Initial commit: Coin scan demo with blur detection and coin contour cropping

- YOLOv5 TFLite coin detection with NMS - Blur classifier for image quality gating - Circular contour refinement and cropping - Camera capture and gallery pick Co-authored-by: Cursor <cursoragent@cursor.com>
2026-07-13 20:35:28 -07:00 · 2026-07-13 20:35:28 -07:00 · 7cee2ae28f
commit 7cee2ae28f
78 changed files with 3615 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,46 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
+
+# Native phash host build (CLI / hashgen)
+/native/phash/build/
--- a/.metadata
+++ b/.metadata
@ -0,0 +1,33 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "5dcb86f68f239346676ceb1ed1ea385bd215fba1"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+      base_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+    - platform: android
+      create_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+      base_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+    - platform: ios
+      create_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+      base_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
--- a/README.md
+++ b/README.md
@ -0,0 +1,23 @@
+# Coin Scan Demo
+
+对照 CoinSnap 反编译：`detect.tflite`（YOLOv5 硬币检测）+ `blur.tflite`（模糊度二分类）。
+
+流程对齐 card-dex-demo，但换成硬币圆框与双模型：
+
+拍照 / 选图 → **blur 清晰度检测** → **detect 目标框** → **圆形轮廓精修** → 圆形裁剪预览。
+
+模型来自 CoinSnap APK `assets/`：
+
+| 模型 | 输入 | 输出 |
+|------|------|------|
+| `detect.tflite` | `[1,320,320,3]` NHWC, `/255`, letterbox | `[1,6300,6]` → cx,cy,w,h,obj,cls |
+| `blur.tflite` | `[1,3,224,224]` NCHW, `/255`, 白底 letterbox | `[1,2]` → `[blur, clear]` |
+
+## 运行
+
+```bash
+export PATH="$HOME/flutter/bin:$PATH"
+cd /Users/a1518/Desktop/project/coin-dex-demo
+flutter pub get
+flutter run
+```
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
--- a/android/.gitignore
+++ b/android/.gitignore
@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@ -0,0 +1,58 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file("local.properties")
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader("UTF-8") { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterVersionCode = localProperties.getProperty("flutter.versionCode")
+if (flutterVersionCode == null) {
+    flutterVersionCode = "1"
+}
+
+def flutterVersionName = localProperties.getProperty("flutter.versionName")
+if (flutterVersionName == null) {
+    flutterVersionName = "1.0"
+}
+
+android {
+    namespace = "com.coindex.coin_dex_demo"
+    compileSdk = 35
+    ndkVersion "27.0.12077973"
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    defaultConfig {
+        applicationId = "com.coindex.coin_dex_demo"
+        minSdk = 26
+        targetSdk = 35
+        versionCode = flutterVersionCode.toInteger()
+        versionName = flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            signingConfig = signingConfigs.debug
+            minifyEnabled false
+            shrinkResources false
+        }
+    }
+}
+
+flutter {
+    source = "../.."
+}
--- a/android/app/src/debug/AndroidManifest.xml
+++ b/android/app/src/debug/AndroidManifest.xml
@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@ -0,0 +1,39 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="32" />
+    <uses-feature android:name="android.hardware.camera" android:required="true" />
+
+    <application
+        android:label="Coin Scan Demo"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:taskAffinity=""
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
+</manifest>
--- a/android/app/src/main/kotlin/com/coindex/coin_dex_demo/MainActivity.kt
+++ b/android/app/src/main/kotlin/com/coindex/coin_dex_demo/MainActivity.kt
@ -0,0 +1,5 @@
+package com.coindex.coin_dex_demo
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity()
--- a/android/app/src/main/res/drawable-v21/launch_background.xml
+++ b/android/app/src/main/res/drawable-v21/launch_background.xml
@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
--- a/android/app/src/main/res/drawable/launch_background.xml
+++ b/android/app/src/main/res/drawable/launch_background.xml
@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
--- a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
+++ b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
--- a/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
+++ b/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
--- a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
--- a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
--- a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
--- a/android/app/src/main/res/values-night/styles.xml
+++ b/android/app/src/main/res/values-night/styles.xml
@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
--- a/android/app/src/main/res/values/styles.xml
+++ b/android/app/src/main/res/values/styles.xml
@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
--- a/android/app/src/profile/AndroidManifest.xml
+++ b/android/app/src/profile/AndroidManifest.xml
@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
--- a/android/build.gradle
+++ b/android/build.gradle
@ -0,0 +1,18 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = "../build"
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register("clean", Delete) {
+    delete rootProject.buildDir
+}
--- a/android/gradle.properties
+++ b/android/gradle.properties
@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx4G -XX:+HeapDumpOnOutOfMemoryError
+android.useAndroidX=true
+android.enableJetifier=true
--- a/android/gradle/wrapper/gradle-wrapper.properties
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
--- a/android/settings.gradle
+++ b/android/settings.gradle
@ -0,0 +1,25 @@
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }()
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "8.7.0" apply false
+    id "org.jetbrains.kotlin.android" version "2.0.21" apply false
+}
+
+include ":app"
--- a/assets/ml/blur.tflite
+++ b/assets/ml/blur.tflite
--- a/assets/ml/detect.tflite
+++ b/assets/ml/detect.tflite
--- a/ios/.gitignore
+++ b/ios/.gitignore
@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3
--- a/ios/Flutter/AppFrameworkInfo.plist
+++ b/ios/Flutter/AppFrameworkInfo.plist
@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>12.0</string>
+</dict>
+</plist>
--- a/ios/Flutter/Debug.xcconfig
+++ b/ios/Flutter/Debug.xcconfig
@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"
--- a/ios/Flutter/Release.xcconfig
+++ b/ios/Flutter/Release.xcconfig
@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"
--- a/ios/Podfile
+++ b/ios/Podfile
@ -0,0 +1,42 @@
+platform :ios, '12.0'
+
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. Run flutter pub get first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+    target.build_configurations.each do |config|
+      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
+    end
+  end
+end
--- a/ios/Runner.xcodeproj/project.pbxproj
+++ b/ios/Runner.xcodeproj/project.pbxproj
@ -0,0 +1,616 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C807B294A618700263BE5 /* RunnerTests.swift */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C8085294A63A400263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 97C146E61CF9000F007C117D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 97C146ED1CF9000F007C117D;
+			remoteInfo = Runner;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
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+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.coindex.coinDexDemo;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.coindex.coinDexDemo;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				331C8088294A63A400263BE5 /* Debug */,
+				331C8089294A63A400263BE5 /* Release */,
+				331C808A294A63A400263BE5 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}
--- a/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
--- a/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+++ b/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
--- a/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+++ b/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
--- a/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ b/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1510"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C8080294A63A400263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
--- a/ios/Runner.xcworkspace/contents.xcworkspacedata
+++ b/ios/Runner.xcworkspace/contents.xcworkspacedata
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>
--- a/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+++ b/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
--- a/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+++ b/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
--- a/ios/Runner/AppDelegate.swift
+++ b/ios/Runner/AppDelegate.swift
@ -0,0 +1,13 @@
+import Flutter
+import UIKit
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
--- a/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
+++ b/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
--- a/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
+++ b/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
--- a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
+++ b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
--- a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
+++ b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
--- a/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
+++ b/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
--- a/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
+++ b/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.
--- a/ios/Runner/Base.lproj/LaunchScreen.storyboard
+++ b/ios/Runner/Base.lproj/LaunchScreen.storyboard
@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>
--- a/ios/Runner/Base.lproj/Main.storyboard
+++ b/ios/Runner/Base.lproj/Main.storyboard
@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>
--- a/ios/Runner/Info.plist
+++ b/ios/Runner/Info.plist
@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Coin Scan Demo</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>coin_dex_demo</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>Camera access is required to scan and crop coins.</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>Photo library access is required to pick a coin image.</string>
+</dict>
+</plist>
--- a/ios/Runner/Runner-Bridging-Header.h
+++ b/ios/Runner/Runner-Bridging-Header.h
@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"
--- a/ios/RunnerTests/RunnerTests.swift
+++ b/ios/RunnerTests/RunnerTests.swift
@ -0,0 +1,12 @@
+import Flutter
+import UIKit
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}
--- a/lib/main.dart
+++ b/lib/main.dart
@ -0,0 +1,34 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'screens/capture_screen.dart';
+
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await SystemChrome.setPreferredOrientations([
+    DeviceOrientation.portraitUp,
+  ]);
+  runApp(const CoinScanDemoApp());
+}
+
+class CoinScanDemoApp extends StatelessWidget {
+  const CoinScanDemoApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Coin Scan Demo',
+      debugShowCheckedModeBanner: false,
+      theme: ThemeData(
+        brightness: Brightness.dark,
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: const Color(0xFFEAB308),
+          brightness: Brightness.dark,
+        ),
+        useMaterial3: true,
+        scaffoldBackgroundColor: const Color(0xFF0B0C10),
+      ),
+      home: const CaptureScreen(),
+    );
+  }
+}
--- a/lib/screens/capture_screen.dart
+++ b/lib/screens/capture_screen.dart
@ -0,0 +1,323 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+
+import '../services/coin_scan_gate.dart';
+import '../widgets/guide_overlay.dart';
+import 'preview_screen.dart';
+
+/// Capture only — blur + detect run after shutter (CoinSnap flow).
+class CaptureScreen extends StatefulWidget {
+  const CaptureScreen({super.key});
+
+  @override
+  State<CaptureScreen> createState() => _CaptureScreenState();
+}
+
+class _CaptureScreenState extends State<CaptureScreen>
+    with WidgetsBindingObserver {
+  final _picker = ImagePicker();
+
+  CameraController? _camera;
+  List<CameraDescription> _cameras = const [];
+  bool _ready = false;
+  bool _busy = false;
+  String? _error;
+  Size? _previewSize;
+
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+    _initCamera();
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    _camera?.dispose();
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    final cam = _camera;
+    if (cam == null || !cam.value.isInitialized) return;
+    if (state == AppLifecycleState.inactive) {
+      cam.dispose();
+      _camera = null;
+      _ready = false;
+    } else if (state == AppLifecycleState.resumed) {
+      _initCamera();
+    }
+  }
+
+  Future<void> _initCamera() async {
+    try {
+      _cameras = await availableCameras();
+      if (_cameras.isEmpty) {
+        setState(() => _error = '没有可用相机');
+        return;
+      }
+      final back = _cameras.firstWhere(
+        (c) => c.lensDirection == CameraLensDirection.back,
+        orElse: () => _cameras.first,
+      );
+      final controller = CameraController(
+        back,
+        ResolutionPreset.high,
+        enableAudio: false,
+      );
+      await controller.initialize();
+      if (!mounted) {
+        await controller.dispose();
+        return;
+      }
+      _camera = controller;
+      setState(() {
+        _ready = true;
+        _error = null;
+      });
+    } catch (e) {
+      setState(() => _error = '相机初始化失败: $e');
+    }
+  }
+
+  Future<void> _openPreviewIfOk(String path) async {
+    final result = await CoinScanGate.evaluate(
+      imagePath: path,
+      captureViewport: _previewSize,
+    );
+    if (!mounted) return;
+    if (!result.ok) {
+      final msg = switch (result.fail) {
+        CoinGateFail.blurry =>
+          '图像过模糊（清晰度 ${(result.blur!.clearScore * 100).toStringAsFixed(0)}%），请重拍',
+        CoinGateFail.noCoin => '未检测到硬币，请对准圆框后重拍',
+        CoinGateFail.none => '无法处理该图片',
+      };
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(msg), duration: const Duration(seconds: 2)),
+      );
+      return;
+    }
+    await Navigator.of(context).push(
+      MaterialPageRoute(
+        builder: (_) => PreviewScreen(
+          imagePath: path,
+          captureViewport: _previewSize,
+        ),
+      ),
+    );
+  }
+
+  Future<void> _capture() async {
+    if (_busy) return;
+    final cam = _camera;
+    if (cam == null || !cam.value.isInitialized) return;
+
+    setState(() => _busy = true);
+    try {
+      final shot = await cam.takePicture();
+      await _openPreviewIfOk(shot.path);
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('拍照失败: $e')),
+        );
+      }
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
+  Future<void> _pickGallery() async {
+    if (_busy) return;
+    setState(() => _busy = true);
+    try {
+      final file = await _picker.pickImage(
+        source: ImageSource.gallery,
+        imageQuality: 100,
+        requestFullMetadata: true,
+      );
+      if (file == null) return;
+      await _openPreviewIfOk(file.path);
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('选图失败: $e')),
+        );
+      }
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
+  Future<void> _switchCamera() async {
+    if (_cameras.length < 2 || _busy) return;
+    final current = _camera?.description;
+    final next = _cameras.firstWhere(
+      (c) => c.lensDirection != current?.lensDirection,
+      orElse: () => _cameras.first,
+    );
+    setState(() => _ready = false);
+    await _camera?.dispose();
+    final controller = CameraController(
+      next,
+      ResolutionPreset.high,
+      enableAudio: false,
+    );
+    await controller.initialize();
+    if (!mounted) {
+      await controller.dispose();
+      return;
+    }
+    _camera = controller;
+    setState(() => _ready = true);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Stack(
+        fit: StackFit.expand,
+        children: [
+          _buildPreview(),
+          SafeArea(
+            child: Padding(
+              padding: const EdgeInsets.fromLTRB(20, 16, 20, 0),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(
+                    '硬币扫描',
+                    style: Theme.of(context).textTheme.headlineSmall?.copyWith(
+                          fontWeight: FontWeight.w700,
+                        ),
+                  ),
+                  const SizedBox(height: 4),
+                  Text(
+                    '将硬币放入圆框 → blur 清晰度检测 → detect 轮廓锁定',
+                    style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                          color: Colors.white70,
+                        ),
+                  ),
+                ],
+              ),
+            ),
+          ),
+          if (_busy)
+            const ColoredBox(
+              color: Color(0x66000000),
+              child: Center(child: CircularProgressIndicator()),
+            ),
+          Positioned(
+            left: 0,
+            right: 0,
+            bottom: 0,
+            child: _buildControls(),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildPreview() {
+    if (_error != null) {
+      return Center(
+        child: Padding(
+          padding: const EdgeInsets.all(24),
+          child: Text(_error!, textAlign: TextAlign.center),
+        ),
+      );
+    }
+    final cam = _camera;
+    if (!_ready || cam == null || !cam.value.isInitialized) {
+      return const Center(child: CircularProgressIndicator());
+    }
+
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final previewSize = Size(constraints.maxWidth, constraints.maxHeight);
+        _previewSize = previewSize;
+        return Stack(
+          fit: StackFit.expand,
+          children: [
+            FittedBox(
+              fit: BoxFit.cover,
+              child: SizedBox(
+                width: cam.value.previewSize?.height ?? previewSize.width,
+                height: cam.value.previewSize?.width ?? previewSize.height,
+                child: CameraPreview(cam),
+              ),
+            ),
+            GuideOverlay(size: previewSize),
+          ],
+        );
+      },
+    );
+  }
+
+  Widget _buildControls() {
+    return SafeArea(
+      child: Padding(
+        padding: const EdgeInsets.fromLTRB(28, 12, 28, 24),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            _RoundButton(
+              icon: Icons.photo_library_outlined,
+              onTap: _busy ? null : _pickGallery,
+            ),
+            GestureDetector(
+              onTap: _busy ? null : _capture,
+              child: Container(
+                width: 76,
+                height: 76,
+                decoration: BoxDecoration(
+                  shape: BoxShape.circle,
+                  border: Border.all(color: Colors.white, width: 4),
+                ),
+                padding: const EdgeInsets.all(5),
+                child: Container(
+                  decoration: const BoxDecoration(
+                    color: Colors.white,
+                    shape: BoxShape.circle,
+                  ),
+                ),
+              ),
+            ),
+            _RoundButton(
+              icon: Icons.flip_camera_ios_outlined,
+              onTap: _busy ? null : _switchCamera,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _RoundButton extends StatelessWidget {
+  const _RoundButton({required this.icon, this.onTap});
+
+  final IconData icon;
+  final VoidCallback? onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      color: Colors.white12,
+      shape: const CircleBorder(),
+      child: InkWell(
+        customBorder: const CircleBorder(),
+        onTap: onTap,
+        child: SizedBox(
+          width: 52,
+          height: 52,
+          child: Icon(icon, color: Colors.white),
+        ),
+      ),
+    );
+  }
+}
--- a/lib/screens/preview_screen.dart
+++ b/lib/screens/preview_screen.dart
@ -0,0 +1,377 @@
+import 'dart:io';
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:image/image.dart' as img;
+import 'package:path_provider/path_provider.dart';
+
+import '../services/blur_detector.dart';
+import '../services/coin_cropper.dart';
+import '../services/coin_detector.dart';
+import '../widgets/guide_frame.dart';
+
+/// Post-capture: blur check → detect → contour refine → circular crop.
+class PreviewScreen extends StatefulWidget {
+  const PreviewScreen({
+    super.key,
+    required this.imagePath,
+    this.captureViewport,
+  });
+
+  final String imagePath;
+  final Size? captureViewport;
+
+  @override
+  State<PreviewScreen> createState() => _PreviewScreenState();
+}
+
+class _PreviewScreenState extends State<PreviewScreen> {
+  final _detector = CoinDetector();
+  final _blur = BlurDetector();
+
+  bool _loading = true;
+  String? _error;
+  ui.Image? _sourceImage;
+  CoinBox? _locked;
+  CropResult? _crop;
+  BlurResult? _blurResult;
+
+  @override
+  void initState() {
+    super.initState();
+    _run();
+  }
+
+  @override
+  void dispose() {
+    _sourceImage?.dispose();
+    _detector.dispose();
+    _blur.dispose();
+    super.dispose();
+  }
+
+  Future<void> _run() async {
+    try {
+      final raw = await File(widget.imagePath).readAsBytes();
+      final displayCodec = await ui.instantiateImageCodec(raw);
+      final displayFrame = await displayCodec.getNextFrame();
+      final fullImage = displayFrame.image;
+
+      final rgba = await fullImage.toByteData(format: ui.ImageByteFormat.rawRgba);
+      if (rgba == null) {
+        fullImage.dispose();
+        throw StateError('无法读取像素');
+      }
+
+      final fullRaster = img.Image.fromBytes(
+        width: fullImage.width,
+        height: fullImage.height,
+        bytes: rgba.buffer,
+        bytesOffset: rgba.offsetInBytes,
+        numChannels: 4,
+        order: img.ChannelOrder.rgba,
+      );
+      fullImage.dispose();
+
+      final imageSize = Size(
+        fullRaster.width.toDouble(),
+        fullRaster.height.toDouble(),
+      );
+      final guide = widget.captureViewport != null
+          ? GuideFrame.inCoverImage(
+              viewport: widget.captureViewport!,
+              imageSize: imageSize,
+            )
+          : GuideFrame.inImage(imageSize);
+
+      final gx = guide.left.round().clamp(0, fullRaster.width - 1);
+      final gy = guide.top.round().clamp(0, fullRaster.height - 1);
+      final gw = guide.width.round().clamp(1, fullRaster.width - gx);
+      final gh = guide.height.round().clamp(1, fullRaster.height - gy);
+      final raster = img.copyCrop(
+        fullRaster,
+        x: gx,
+        y: gy,
+        width: gw,
+        height: gh,
+      );
+
+      final blurResult = await _blur.evaluate(raster);
+      if (blurResult.isBlurry) {
+        if (!mounted) return;
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text(
+              '图像过模糊（清晰 ${(blurResult.clearScore * 100).toStringAsFixed(0)}%），请重拍',
+            ),
+          ),
+        );
+        Navigator.of(context).pop();
+        return;
+      }
+
+      final dir = await getTemporaryDirectory();
+      final guidePath =
+          '${dir.path}/coin_guide_${DateTime.now().millisecondsSinceEpoch}.jpg';
+      await File(guidePath).writeAsBytes(
+        img.encodeJpg(raster, quality: 100),
+        flush: true,
+      );
+
+      final guideBytes = img.encodeJpg(raster, quality: 100);
+      final guideCodec = await ui.instantiateImageCodec(guideBytes);
+      final guideFrame = await guideCodec.getNextFrame();
+      final displayImage = guideFrame.image;
+
+      final boxes = await _detector.detectImage(raster);
+      final guideSize = Size(
+        displayImage.width.toDouble(),
+        displayImage.height.toDouble(),
+      );
+      var best = _detector.pickBest(boxes, imageSize: guideSize);
+      if (best == null) {
+        displayImage.dispose();
+        if (!mounted) return;
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('未检测到硬币，请重拍')),
+        );
+        Navigator.of(context).pop();
+        return;
+      }
+      best = _detector.refineContour(raster, best);
+
+      final crop = await CoinCropper.cropAndCorrect(
+        imagePath: guidePath,
+        box: best,
+      );
+
+      if (!mounted) {
+        displayImage.dispose();
+        return;
+      }
+      setState(() {
+        _sourceImage = displayImage;
+        _locked = best;
+        _crop = crop;
+        _blurResult = blurResult;
+        _loading = false;
+      });
+    } catch (e) {
+      if (!mounted) return;
+      setState(() {
+        _error = '处理失败: $e';
+        _loading = false;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('硬币轮廓锁定'),
+        backgroundColor: Colors.transparent,
+      ),
+      body: SafeArea(
+        child: Padding(
+          padding: const EdgeInsets.fromLTRB(20, 8, 20, 24),
+          child: _loading
+              ? const Center(
+                  child: Column(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      CircularProgressIndicator(),
+                      SizedBox(height: 16),
+                      Text('blur → detect → 轮廓精修…'),
+                    ],
+                  ),
+                )
+              : _error != null
+                  ? Center(child: Text(_error!, textAlign: TextAlign.center))
+                  : _buildContent(context),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildContent(BuildContext context) {
+    final blur = _blurResult;
+    final locked = _locked;
+    final meta = [
+      if (blur != null)
+        '清晰度 ${(blur.clearScore * 100).toStringAsFixed(0)}%',
+      if (locked != null)
+        '检测 ${(locked.confidence * 100).toStringAsFixed(0)}%',
+      if (locked?.radius != null)
+        '半径 ${locked!.radius!.round()}px',
+    ].join(' · ');
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        Text(
+          meta,
+          style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                color: Colors.white70,
+              ),
+        ),
+        const SizedBox(height: 8),
+        Expanded(
+          child: SingleChildScrollView(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                SizedBox(
+                  height: 260,
+                  child: _LockedPhotoView(
+                    image: _sourceImage!,
+                    locked: _locked,
+                  ),
+                ),
+                const SizedBox(height: 12),
+                Text('圆形裁剪', style: Theme.of(context).textTheme.titleSmall),
+                const SizedBox(height: 6),
+                SizedBox(
+                  height: 200,
+                  child: Center(
+                    child: ClipOval(
+                      child: ColoredBox(
+                        color: Colors.black26,
+                        child: Image.memory(
+                          _crop!.bytes,
+                          width: 180,
+                          height: 180,
+                          fit: BoxFit.cover,
+                          filterQuality: FilterQuality.high,
+                        ),
+                      ),
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 16),
+                FilledButton.icon(
+                  onPressed: () => Navigator.of(context).pop(),
+                  icon: const Icon(Icons.camera_alt_outlined),
+                  label: const Text('重新拍摄'),
+                  style: FilledButton.styleFrom(
+                    minimumSize: const Size.fromHeight(48),
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _LockedPhotoView extends StatelessWidget {
+  const _LockedPhotoView({required this.image, required this.locked});
+
+  final ui.Image image;
+  final CoinBox? locked;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final view = Size(constraints.maxWidth, constraints.maxHeight);
+        final imgSize = Size(image.width.toDouble(), image.height.toDouble());
+        final fitted = _contain(imgSize, view);
+
+        return ClipRRect(
+          borderRadius: BorderRadius.circular(12),
+          child: ColoredBox(
+            color: Colors.black26,
+            child: Stack(
+              children: [
+                Positioned.fromRect(
+                  rect: fitted,
+                  child: RawImage(
+                    image: image,
+                    fit: BoxFit.fill,
+                    filterQuality: FilterQuality.high,
+                  ),
+                ),
+                if (locked != null)
+                  Positioned.fill(
+                    child: CustomPaint(
+                      painter: _LockPainter(
+                        box: locked!,
+                        imageSize: imgSize,
+                        fitted: fitted,
+                      ),
+                    ),
+                  ),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+
+  static Rect _contain(Size image, Size view) {
+    final scale = (view.width / image.width < view.height / image.height)
+        ? view.width / image.width
+        : view.height / image.height;
+    final w = image.width * scale;
+    final h = image.height * scale;
+    return Rect.fromLTWH(
+      (view.width - w) / 2,
+      (view.height - h) / 2,
+      w,
+      h,
+    );
+  }
+}
+
+class _LockPainter extends CustomPainter {
+  _LockPainter({
+    required this.box,
+    required this.imageSize,
+    required this.fitted,
+  });
+
+  final CoinBox box;
+  final Size imageSize;
+  final Rect fitted;
+
+  Offset _map(Offset p) => Offset(
+        fitted.left + p.dx / imageSize.width * fitted.width,
+        fitted.top + p.dy / imageSize.height * fitted.height,
+      );
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final c = _map(box.effectiveCenter);
+    final r = box.effectiveRadius / imageSize.width * fitted.width;
+
+    final ring = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 3
+      ..color = const Color(0xFFEAB308);
+    canvas.drawCircle(c, r, ring);
+
+    final aabb = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 1.2
+      ..color = const Color(0x66EAB308);
+    final tl = _map(box.rect.topLeft);
+    final br = _map(box.rect.bottomRight);
+    canvas.drawRect(Rect.fromPoints(tl, br), aabb);
+
+    final cross = Paint()
+      ..color = const Color(0xFFEAB308)
+      ..strokeWidth = 2;
+    const len = 10.0;
+    canvas.drawLine(Offset(c.dx - len, c.dy), Offset(c.dx + len, c.dy), cross);
+    canvas.drawLine(Offset(c.dx, c.dy - len), Offset(c.dx, c.dy + len), cross);
+  }
+
+  @override
+  bool shouldRepaint(covariant _LockPainter old) {
+    return old.box != box || old.fitted != fitted || old.imageSize != imageSize;
+  }
+}
--- a/lib/services/blur_detector.dart
+++ b/lib/services/blur_detector.dart
@ -0,0 +1,117 @@
+import 'dart:typed_data';
+
+import 'package:image/image.dart' as img;
+import 'package:tflite_flutter/tflite_flutter.dart';
+
+/// Blur / sharpness result from CoinSnap `blur.tflite`.
+class BlurResult {
+  const BlurResult({
+    required this.blurScore,
+    required this.clearScore,
+    required this.isBlurry,
+  });
+
+  /// Softmax-ish class 0 = blur, class 1 = clear (from model).
+  final double blurScore;
+  final double clearScore;
+  final bool isBlurry;
+
+  double get confidence => isBlurry ? blurScore : clearScore;
+}
+
+/// CoinSnap blur classifier (`assets/ml/blur.tflite`).
+///
+/// Input: `[1, 3, 224, 224]` NCHW float32, letterbox on white, pixels / 255.
+/// Output: `[1, 2]` → `[blur, clear]`.
+class BlurDetector {
+  BlurDetector({this.clearThreshold = 0.55});
+
+  static const int inputSize = 224;
+  static const String assetPath = 'assets/ml/blur.tflite';
+
+  /// Clear score must be ≥ this to pass (mirrors app-side threshold).
+  final double clearThreshold;
+
+  Interpreter? _interpreter;
+  bool _loading = false;
+
+  Future<void> ensureLoaded() async {
+    if (_interpreter != null || _loading) return;
+    _loading = true;
+    try {
+      _interpreter = await Interpreter.fromAsset(assetPath);
+    } finally {
+      _loading = false;
+    }
+  }
+
+  Future<BlurResult> evaluate(img.Image image) async {
+    await ensureLoaded();
+    final interp = _interpreter;
+    if (interp == null) {
+      return const BlurResult(blurScore: 0, clearScore: 1, isBlurry: false);
+    }
+
+    final canvas = _letterboxWhite(image, inputSize);
+    final flat = _toNchw(canvas);
+    // Nested list matches [1, 3, 224, 224] NCHW.
+    final inputNd = List.generate(
+      1,
+      (_) => List.generate(
+        3,
+        (c) => List.generate(
+          inputSize,
+          (y) => List.generate(inputSize, (x) {
+            final i = c * inputSize * inputSize + y * inputSize + x;
+            return flat[i];
+          }),
+        ),
+      ),
+    );
+    final output = List.generate(1, (_) => List<double>.filled(2, 0.0));
+    interp.run(inputNd, output);
+
+    final blur = output[0][0];
+    final clear = output[0][1];
+    final isBlurry = clear < clearThreshold;
+    return BlurResult(blurScore: blur, clearScore: clear, isBlurry: isBlurry);
+  }
+
+  Future<void> dispose() async {
+    _interpreter?.close();
+    _interpreter = null;
+  }
+
+  static img.Image _letterboxWhite(img.Image src, int size) {
+    final scale = size / (src.width > src.height ? src.width : src.height);
+    final nw = (src.width * scale).round().clamp(1, size);
+    final nh = (src.height * scale).round().clamp(1, size);
+    final resized = img.copyResize(
+      src,
+      width: nw,
+      height: nh,
+      interpolation: img.Interpolation.linear,
+    );
+    final canvas = img.Image(width: size, height: size);
+    img.fill(canvas, color: img.ColorRgb8(255, 255, 255));
+    final padX = ((size - nw) / 2).floor();
+    final padY = ((size - nh) / 2).floor();
+    img.compositeImage(canvas, resized, dstX: padX, dstY: padY);
+    return canvas;
+  }
+
+  static Float32List _toNchw(img.Image canvas) {
+    final out = Float32List(1 * 3 * inputSize * inputSize);
+    const plane = inputSize * inputSize;
+    for (var y = 0; y < inputSize; y++) {
+      for (var x = 0; x < inputSize; x++) {
+        final p = canvas.getPixel(x, y);
+        final i = y * inputSize + x;
+        out[i] = p.r / 255.0;
+        out[plane + i] = p.g / 255.0;
+        out[plane * 2 + i] = p.b / 255.0;
+      }
+    }
+    return out;
+  }
+}
--- a/lib/services/coin_contour_refiner.dart
+++ b/lib/services/coin_contour_refiner.dart
@ -0,0 +1,96 @@
+import 'dart:math' as math;
+import 'dart:ui';
+
+import 'package:image/image.dart' as img;
+
+class RefinedCircle {
+  const RefinedCircle({required this.center, required this.radius});
+  final Offset center;
+  final double radius;
+}
+
+/// Refine an AABB into a circular coin contour via radial edge search.
+class CoinContourRefiner {
+  static RefinedCircle? refine(img.Image image, Rect aabb) {
+    if (aabb.width < 16 || aabb.height < 16) return null;
+
+    final cx = aabb.center.dx;
+    final cy = aabb.center.dy;
+    final maxR = math.max(aabb.width, aabb.height) * 0.62;
+    final minR = math.min(aabb.width, aabb.height) * 0.28;
+    if (maxR <= minR + 2) {
+      return RefinedCircle(
+        center: Offset(cx, cy),
+        radius: math.min(aabb.width, aabb.height) / 2,
+      );
+    }
+
+    // Sample edge strength along rays; vote for radius with strongest ring.
+    const rays = 64;
+    final radiusVotes = <double>[];
+    for (var i = 0; i < rays; i++) {
+      final ang = (i / rays) * math.pi * 2;
+      final dx = math.cos(ang);
+      final dy = math.sin(ang);
+      var bestR = (minR + maxR) / 2;
+      var bestMag = -1.0;
+      for (var r = minR; r <= maxR; r += 1.5) {
+        final x1 = (cx + dx * r).round();
+        final y1 = (cy + dy * r).round();
+        final x0 = (cx + dx * (r - 2)).round();
+        final y0 = (cy + dy * (r - 2)).round();
+        if (!_in(image, x0, y0) || !_in(image, x1, y1)) continue;
+        final g0 = _gray(image, x0, y0);
+        final g1 = _gray(image, x1, y1);
+        final mag = (g1 - g0).abs();
+        if (mag > bestMag) {
+          bestMag = mag;
+          bestR = r;
+        }
+      }
+      if (bestMag > 8) radiusVotes.add(bestR);
+    }
+
+    if (radiusVotes.length < rays * 0.35) {
+      return RefinedCircle(
+        center: Offset(cx, cy),
+        radius: math.min(aabb.width, aabb.height) / 2 * 0.96,
+      );
+    }
+
+    radiusVotes.sort();
+    final radius = radiusVotes[radiusVotes.length ~/ 2] * 1.04;
+
+    // Slight center nudge from opposite ray midpoints.
+    var nx = 0.0;
+    var ny = 0.0;
+    var n = 0;
+    for (var i = 0; i < rays; i += 2) {
+      final ang = (i / rays) * math.pi * 2;
+      final r = radiusVotes[math.min(i, radiusVotes.length - 1)];
+      nx += cx + math.cos(ang) * (r - radius);
+      ny += cy + math.sin(ang) * (r - radius);
+      n++;
+    }
+    final center = n == 0
+        ? Offset(cx, cy)
+        : Offset(
+            ((nx / n) + cx) / 2,
+            ((ny / n) + cy) / 2,
+          );
+
+    final clamped = Offset(
+      center.dx.clamp(radius, image.width - radius),
+      center.dy.clamp(radius, image.height - radius),
+    );
+    return RefinedCircle(center: clamped, radius: radius);
+  }
+
+  static bool _in(img.Image image, int x, int y) =>
+      x >= 0 && y >= 0 && x < image.width && y < image.height;
+
+  static double _gray(img.Image image, int x, int y) {
+    final p = image.getPixel(x, y);
+    return 0.299 * p.r + 0.587 * p.g + 0.114 * p.b;
+  }
+}
--- a/lib/services/coin_cropper.dart
+++ b/lib/services/coin_cropper.dart
@ -0,0 +1,80 @@
+import 'dart:io';
+import 'dart:math' as math;
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:image/image.dart' as img;
+
+import 'coin_detector.dart';
+
+class CropResult {
+  const CropResult({
+    required this.bytes,
+    required this.width,
+    required this.height,
+    required this.usedDetection,
+  });
+
+  final Uint8List bytes;
+  final int width;
+  final int height;
+  final bool usedDetection;
+}
+
+/// Circular crop of the detected coin (square output with transparent-ish bg).
+class CoinCropper {
+  static Future<CropResult> cropAndCorrect({
+    required String imagePath,
+    CoinBox? box,
+    double padding = 0.12,
+  }) async {
+    final raw = await File(imagePath).readAsBytes();
+    var decoded = img.decodeImage(raw);
+    if (decoded == null) {
+      throw StateError('Failed to decode image: $imagePath');
+    }
+    decoded = img.bakeOrientation(decoded);
+
+    final usedDetection = box != null;
+    final center = box?.effectiveCenter ??
+        Offset(decoded.width / 2, decoded.height / 2);
+    var radius = box?.effectiveRadius ??
+        math.min(decoded.width, decoded.height) * 0.35;
+    radius *= (1 + padding);
+
+    final size = (radius * 2).round().clamp(32, 2048);
+    final out = img.Image(width: size, height: size, numChannels: 4);
+    img.fill(out, color: img.ColorRgba8(0, 0, 0, 0));
+
+    final r2 = radius * radius;
+    for (var y = 0; y < size; y++) {
+      for (var x = 0; x < size; x++) {
+        final dx = x + 0.5 - size / 2;
+        final dy = y + 0.5 - size / 2;
+        if (dx * dx + dy * dy > r2) continue;
+        final sx = (center.dx + dx).round();
+        final sy = (center.dy + dy).round();
+        if (sx < 0 || sy < 0 || sx >= decoded.width || sy >= decoded.height) {
+          continue;
+        }
+        final p = decoded.getPixel(sx, sy);
+        out.setPixelRgba(x, y, p.r.toInt(), p.g.toInt(), p.b.toInt(), 255);
+      }
+    }
+
+    const outSize = 320;
+    final resized = img.copyResize(
+      out,
+      width: outSize,
+      height: outSize,
+      interpolation: img.Interpolation.cubic,
+    );
+    final bytes = Uint8List.fromList(img.encodePng(resized));
+    return CropResult(
+      bytes: bytes,
+      width: resized.width,
+      height: resized.height,
+      usedDetection: usedDetection,
+    );
+  }
+}
--- a/lib/services/coin_detector.dart
+++ b/lib/services/coin_detector.dart
@ -0,0 +1,251 @@
+import 'dart:math' as math;
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:image/image.dart' as img;
+import 'package:tflite_flutter/tflite_flutter.dart';
+
+import 'coin_contour_refiner.dart';
+
+/// Detected coin region in image pixel coordinates.
+class CoinBox {
+  const CoinBox({
+    required this.rect,
+    required this.confidence,
+    this.center,
+    this.radius,
+  });
+
+  /// Axis-aligned outer bounds.
+  final Rect rect;
+  final double confidence;
+
+  /// Refined circle (image pixels). When null, use [rect] inscribed circle.
+  final Offset? center;
+  final double? radius;
+
+  Offset get effectiveCenter =>
+      center ?? Offset(rect.center.dx, rect.center.dy);
+
+  double get effectiveRadius =>
+      radius ?? (math.min(rect.width, rect.height) / 2);
+
+  CoinBox copyWith({
+    Rect? rect,
+    double? confidence,
+    Offset? center,
+    double? radius,
+  }) {
+    return CoinBox(
+      rect: rect ?? this.rect,
+      confidence: confidence ?? this.confidence,
+      center: center ?? this.center,
+      radius: radius ?? this.radius,
+    );
+  }
+}
+
+/// CoinSnap-style YOLOv5 detector (`assets/ml/detect.tflite`).
+///
+/// Input: `[1, 320, 320, 3]` float32, pixels / 255, letterbox resize.
+/// Output: `[1, 6300, 6]` → `cx, cy, w, h, obj, cls` (already 0–1).
+class CoinDetector {
+  CoinDetector();
+
+  static const int inputSize = 320;
+  static const double confThreshold = 0.35;
+  static const double iouThreshold = 0.45;
+  static const String assetPath = 'assets/ml/detect.tflite';
+
+  Interpreter? _interpreter;
+  bool _loading = false;
+
+  Future<void> ensureLoaded() async {
+    if (_interpreter != null || _loading) return;
+    _loading = true;
+    try {
+      _interpreter = await Interpreter.fromAsset(assetPath);
+    } finally {
+      _loading = false;
+    }
+  }
+
+  Future<List<CoinBox>> detectImage(img.Image image) async {
+    await ensureLoaded();
+    final interp = _interpreter;
+    if (interp == null) return const [];
+
+    final prepared = _letterbox(image, inputSize);
+    final input = _toInputTensor(prepared.canvas);
+    // Nested list matches [1, 6300, 6] expected by tflite_flutter.
+    final output = List.generate(
+      1,
+      (_) => List.generate(6300, (_) => List<double>.filled(6, 0.0)),
+    );
+    final inputNd = List.generate(
+      1,
+      (_) => List.generate(
+        inputSize,
+        (y) => List.generate(
+          inputSize,
+          (x) {
+            final i = (y * inputSize + x) * 3;
+            return [input[i], input[i + 1], input[i + 2]];
+          },
+        ),
+      ),
+    );
+
+    interp.run(inputNd, output);
+
+    final boxes = <CoinBox>[];
+    final rows = output[0];
+    for (final row in rows) {
+      final score = row[4] * row[5];
+      if (score < confThreshold) continue;
+
+      // Normalized cx,cy,w,h on the letterboxed 320 canvas.
+      final cx = row[0] * inputSize;
+      final cy = row[1] * inputSize;
+      final w = row[2] * inputSize;
+      final h = row[3] * inputSize;
+
+      // Map back from letterbox → original image pixels.
+      final left = (cx - w / 2 - prepared.padX) / prepared.scale;
+      final top = (cy - h / 2 - prepared.padY) / prepared.scale;
+      final right = (cx + w / 2 - prepared.padX) / prepared.scale;
+      final bottom = (cy + h / 2 - prepared.padY) / prepared.scale;
+
+      final rect = Rect.fromLTRB(left, top, right, bottom).intersect(
+        Rect.fromLTWH(0, 0, image.width.toDouble(), image.height.toDouble()),
+      );
+      if (rect.width < 8 || rect.height < 8) continue;
+
+      boxes.add(CoinBox(rect: rect, confidence: score));
+    }
+
+    return _nms(boxes);
+  }
+
+  /// Prefer largest reasonably confident near-circular box.
+  CoinBox? pickBest(List<CoinBox> boxes, {Size? imageSize}) {
+    if (boxes.isEmpty) return null;
+    CoinBox? best;
+    var bestScore = -1.0;
+    for (final b in boxes) {
+      final area = b.rect.width * b.rect.height;
+      final imgArea = imageSize == null
+          ? area
+          : (imageSize.width * imageSize.height).clamp(1.0, double.infinity);
+      final fill = area / imgArea;
+      if (fill < 0.02 || fill > 0.95) continue;
+
+      final aspect = b.rect.width / math.max(b.rect.height, 1.0);
+      final roundScore = 1.0 - (aspect - 1.0).abs().clamp(0.0, 1.0);
+      final score = b.confidence * 0.45 + fill * 0.25 + roundScore * 0.3;
+      if (score > bestScore) {
+        bestScore = score;
+        best = b;
+      }
+    }
+    return best ?? boxes.first;
+  }
+
+  /// Refine AABB into a circle using local edge intensity.
+  CoinBox refineContour(img.Image image, CoinBox box) {
+    final refined = CoinContourRefiner.refine(image, box.rect);
+    if (refined == null) {
+      final r = math.min(box.rect.width, box.rect.height) / 2;
+      return box.copyWith(center: box.rect.center, radius: r);
+    }
+    final side = refined.radius * 2;
+    final rect = Rect.fromCenter(
+      center: refined.center,
+      width: side,
+      height: side,
+    ).intersect(
+      Rect.fromLTWH(0, 0, image.width.toDouble(), image.height.toDouble()),
+    );
+    return box.copyWith(
+      rect: rect,
+      center: refined.center,
+      radius: refined.radius,
+    );
+  }
+
+  Future<void> dispose() async {
+    _interpreter?.close();
+    _interpreter = null;
+  }
+
+  static Float32List _toInputTensor(img.Image canvas) {
+    final out = Float32List(1 * inputSize * inputSize * 3);
+    var i = 0;
+    for (var y = 0; y < inputSize; y++) {
+      for (var x = 0; x < inputSize; x++) {
+        final p = canvas.getPixel(x, y);
+        out[i++] = p.r / 255.0;
+        out[i++] = p.g / 255.0;
+        out[i++] = p.b / 255.0;
+      }
+    }
+    return out;
+  }
+
+  static _Letterbox _letterbox(img.Image src, int size) {
+    final scale = math.min(size / src.width, size / src.height);
+    final nw = math.max(1, (src.width * scale).round());
+    final nh = math.max(1, (src.height * scale).round());
+    final resized = img.copyResize(
+      src,
+      width: nw,
+      height: nh,
+      interpolation: img.Interpolation.linear,
+    );
+    final canvas = img.Image(width: size, height: size);
+    img.fill(canvas, color: img.ColorRgb8(114, 114, 114));
+    final padX = ((size - nw) / 2).floor();
+    final padY = ((size - nh) / 2).floor();
+    img.compositeImage(canvas, resized, dstX: padX, dstY: padY);
+    return _Letterbox(canvas: canvas, scale: scale, padX: padX.toDouble(), padY: padY.toDouble());
+  }
+
+  static List<CoinBox> _nms(List<CoinBox> boxes) {
+    final sorted = [...boxes]..sort((a, b) => b.confidence.compareTo(a.confidence));
+    final kept = <CoinBox>[];
+    final suppressed = List<bool>.filled(sorted.length, false);
+    for (var i = 0; i < sorted.length; i++) {
+      if (suppressed[i]) continue;
+      kept.add(sorted[i]);
+      for (var j = i + 1; j < sorted.length; j++) {
+        if (suppressed[j]) continue;
+        if (_iou(sorted[i].rect, sorted[j].rect) > iouThreshold) {
+          suppressed[j] = true;
+        }
+      }
+    }
+    return kept;
+  }
+
+  static double _iou(Rect a, Rect b) {
+    final inter = a.intersect(b);
+    if (inter.isEmpty) return 0;
+    final interArea = inter.width * inter.height;
+    final union = a.width * a.height + b.width * b.height - interArea;
+    return union <= 0 ? 0 : interArea / union;
+  }
+}
+
+class _Letterbox {
+  const _Letterbox({
+    required this.canvas,
+    required this.scale,
+    required this.padX,
+    required this.padY,
+  });
+
+  final img.Image canvas;
+  final double scale;
+  final double padX;
+  final double padY;
+}
--- a/lib/services/coin_scan_gate.dart
+++ b/lib/services/coin_scan_gate.dart
@ -0,0 +1,122 @@
+import 'dart:io';
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:image/image.dart' as img;
+import 'package:path_provider/path_provider.dart';
+
+import '../widgets/guide_frame.dart';
+import 'blur_detector.dart';
+import 'coin_detector.dart';
+
+enum CoinGateFail { none, blurry, noCoin }
+
+class CoinGateResult {
+  const CoinGateResult({
+    required this.ok,
+    this.fail = CoinGateFail.none,
+    this.blur,
+    this.box,
+  });
+
+  final bool ok;
+  final CoinGateFail fail;
+  final BlurResult? blur;
+  final CoinBox? box;
+}
+
+/// Post-capture gate: blur.tflite → detect.tflite (CoinSnap order).
+class CoinScanGate {
+  static Future<CoinGateResult> evaluate({
+    required String imagePath,
+    Size? captureViewport,
+    CoinDetector? detector,
+    BlurDetector? blurDetector,
+  }) async {
+    final ownedDet = detector == null;
+    final ownedBlur = blurDetector == null;
+    final det = detector ?? CoinDetector();
+    final blur = blurDetector ?? BlurDetector();
+
+    try {
+      final raster = await _guideCrop(imagePath, captureViewport);
+      if (raster == null) {
+        return const CoinGateResult(ok: false, fail: CoinGateFail.noCoin);
+      }
+
+      final blurResult = await blur.evaluate(raster);
+      if (blurResult.isBlurry) {
+        return CoinGateResult(
+          ok: false,
+          fail: CoinGateFail.blurry,
+          blur: blurResult,
+        );
+      }
+
+      final boxes = await det.detectImage(raster);
+      final best = det.pickBest(
+        boxes,
+        imageSize: Size(raster.width.toDouble(), raster.height.toDouble()),
+      );
+      if (best == null) {
+        return CoinGateResult(
+          ok: false,
+          fail: CoinGateFail.noCoin,
+          blur: blurResult,
+        );
+      }
+      return CoinGateResult(ok: true, blur: blurResult, box: best);
+    } finally {
+      if (ownedDet) await det.dispose();
+      if (ownedBlur) await blur.dispose();
+    }
+  }
+
+  static Future<img.Image?> _guideCrop(
+    String imagePath,
+    Size? captureViewport,
+  ) async {
+    final raw = await File(imagePath).readAsBytes();
+    final codec = await ui.instantiateImageCodec(raw);
+    final frame = await codec.getNextFrame();
+    final fullImage = frame.image;
+    final rgba = await fullImage.toByteData(format: ui.ImageByteFormat.rawRgba);
+    if (rgba == null) {
+      fullImage.dispose();
+      return null;
+    }
+
+    final fullRaster = img.Image.fromBytes(
+      width: fullImage.width,
+      height: fullImage.height,
+      bytes: rgba.buffer,
+      bytesOffset: rgba.offsetInBytes,
+      numChannels: 4,
+      order: img.ChannelOrder.rgba,
+    );
+    fullImage.dispose();
+
+    final imageSize = Size(
+      fullRaster.width.toDouble(),
+      fullRaster.height.toDouble(),
+    );
+    final guide = captureViewport != null
+        ? GuideFrame.inCoverImage(viewport: captureViewport, imageSize: imageSize)
+        : GuideFrame.inImage(imageSize);
+
+    final gx = guide.left.round().clamp(0, fullRaster.width - 1);
+    final gy = guide.top.round().clamp(0, fullRaster.height - 1);
+    final gw = guide.width.round().clamp(1, fullRaster.width - gx);
+    final gh = guide.height.round().clamp(1, fullRaster.height - gy);
+    return img.copyCrop(fullRaster, x: gx, y: gy, width: gw, height: gh);
+  }
+
+  /// Persist guide crop for preview reuse.
+  static Future<String> writeGuideJpeg(img.Image raster) async {
+    final dir = await getTemporaryDirectory();
+    final path =
+        '${dir.path}/coin_guide_${DateTime.now().millisecondsSinceEpoch}.jpg';
+    await File(path).writeAsBytes(img.encodeJpg(raster, quality: 95), flush: true);
+    return path;
+  }
+}
--- a/lib/widgets/guide_frame.dart
+++ b/lib/widgets/guide_frame.dart
@ -0,0 +1,44 @@
+import 'dart:math' as math;
+import 'dart:ui';
+
+/// Circular capture guide (coin frame).
+class GuideFrame {
+  static const double maxDiameterFraction = 0.72;
+  static const double centerYFraction = 0.46;
+
+  static Rect inViewport(Size size) {
+    final d = math.min(size.width, size.height) * maxDiameterFraction;
+    return Rect.fromCenter(
+      center: Offset(size.width / 2, size.height * centerYFraction),
+      width: d,
+      height: d,
+    );
+  }
+
+  static Rect inCoverImage({
+    required Size viewport,
+    required Size imageSize,
+  }) {
+    final guide = inViewport(viewport);
+    final scale = math.max(
+      viewport.width / imageSize.width,
+      viewport.height / imageSize.height,
+    );
+    final dispW = imageSize.width * scale;
+    final dispH = imageSize.height * scale;
+    final ox = (viewport.width - dispW) / 2;
+    final oy = (viewport.height - dispH) / 2;
+
+    final mapped = Rect.fromLTRB(
+      (guide.left - ox) / scale,
+      (guide.top - oy) / scale,
+      (guide.right - ox) / scale,
+      (guide.bottom - oy) / scale,
+    );
+    return mapped.intersect(
+      Rect.fromLTWH(0, 0, imageSize.width, imageSize.height),
+    );
+  }
+
+  static Rect inImage(Size imageSize) => inViewport(imageSize);
+}
--- a/lib/widgets/guide_overlay.dart
+++ b/lib/widgets/guide_overlay.dart
@ -0,0 +1,50 @@
+import 'package:flutter/material.dart';
+
+import 'guide_frame.dart';
+
+/// Circular shooting guide overlay.
+class GuideOverlay extends StatelessWidget {
+  const GuideOverlay({super.key, required this.size});
+
+  final Size size;
+
+  @override
+  Widget build(BuildContext context) {
+    return CustomPaint(
+      size: size,
+      painter: _GuidePainter(),
+    );
+  }
+}
+
+class _GuidePainter extends CustomPainter {
+  @override
+  void paint(Canvas canvas, Size size) {
+    final rect = GuideFrame.inViewport(size);
+    final dim = Paint()..color = Colors.black.withOpacity(0.45);
+    final path = Path()
+      ..addRect(Offset.zero & size)
+      ..addOval(rect)
+      ..fillType = PathFillType.evenOdd;
+    canvas.drawPath(path, dim);
+
+    final border = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 2
+      ..color = Colors.white70;
+    canvas.drawOval(rect, border);
+
+    // Crosshair ticks
+    final tick = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 2
+      ..color = const Color(0xFFEAB308);
+    final c = rect.center;
+    const len = 14.0;
+    canvas.drawLine(Offset(c.dx - len, c.dy), Offset(c.dx + len, c.dy), tick);
+    canvas.drawLine(Offset(c.dx, c.dy - len), Offset(c.dx, c.dy + len), tick);
+  }
+
+  @override
+  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
+}
--- a/pubspec.lock
+++ b/pubspec.lock
@ -0,0 +1,554 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: a96e8b390886ee8abb49b7bd3ac8df6f451c621619f52a26e815fdcf568959ff
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.9"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.11.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  camera:
+    dependency: "direct main"
+    description:
+      name: camera
+      sha256: dfa8fc5a1adaeb95e7a54d86a5bd56f4bb0e035515354c8ac6d262e35cec2ec8
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.6"
+  camera_android:
+    dependency: transitive
+    description:
+      name: camera_android
+      sha256: "32f04948a284b71d938fe275616faf4957d07f9b3aab8021bfc8c418301a289e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.9+11"
+  camera_avfoundation:
+    dependency: transitive
+    description:
+      name: camera_avfoundation
+      sha256: ca36181194f429eef3b09de3c96280f2400693f9735025f90d1f4a27465fdd72
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.19"
+  camera_platform_interface:
+    dependency: transitive
+    description:
+      name: camera_platform_interface
+      sha256: "2f757024a48696ff4814a789b0bd90f5660c0fb25f393ab4564fb483327930e2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.0"
+  camera_web:
+    dependency: transitive
+    description:
+      name: camera_web
+      sha256: "595f28c89d1fb62d77c73c633193755b781c6d2e0ebcd8dc25b763b514e6ba8f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.18.0"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "7caf6a750a0c04effbb52a676dce9a4a592e10ad35c34d6d2d0e4811160d5670"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.4+2"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.8"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  file_selector_linux:
+    dependency: transitive
+    description:
+      name: file_selector_linux
+      sha256: "54cbbd957e1156d29548c7d9b9ec0c0ebb6de0a90452198683a7d23aed617a33"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+2"
+  file_selector_macos:
+    dependency: transitive
+    description:
+      name: file_selector_macos
+      sha256: "271ab9986df0c135d45c3cdb6bd0faa5db6f4976d3e4b437cf7d0f258d941bfc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4+2"
+  file_selector_platform_interface:
+    dependency: transitive
+    description:
+      name: file_selector_platform_interface
+      sha256: a3994c26f10378a039faa11de174d7b78eb8f79e4dd0af2a451410c1a5c3f66b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.6.2"
+  file_selector_windows:
+    dependency: transitive
+    description:
+      name: file_selector_windows
+      sha256: "320fcfb6f33caa90f0b58380489fc5ac05d99ee94b61aa96ec2bff0ba81d3c2b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+4"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: "9e8c3858111da373efc5aa341de011d9bd23e2c5c5e0c62bccf32438e192d7b1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: "9ee02950848f61c4129af3d6ec84a1cfc0e47931abc746b03e7a3bc3e8ff6eda"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.22"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.0"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  image:
+    dependency: "direct main"
+    description:
+      name: image
+      sha256: f9881ff4998044947ec38d098bc7c8316ae1186fa786eddffdb867b9bc94dfce
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.8.0"
+  image_picker:
+    dependency: "direct main"
+    description:
+      name: image_picker
+      sha256: "021834d9c0c3de46bf0fe40341fa07168407f694d9b2bb18d532dc1261867f7a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      sha256: "8c5abf0dcc24fe6e8e0b4a5c0b51a5cf30cefdf6407a3213dae61edc75a70f56"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.12+12"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      sha256: "717eb042ab08c40767684327be06a5d8dbb341fe791d514e4b92c7bbe1b7bb83"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.6"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      sha256: "05da758e67bc7839e886b3959848aa6b44ff123ab4b28f67891008afe8ef9100"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.12+2"
+  image_picker_linux:
+    dependency: transitive
+    description:
+      name: image_picker_linux
+      sha256: "34a65f6740df08bbbeb0a1abd8e6d32107941fd4868f67a507b25601651022c9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+2"
+  image_picker_macos:
+    dependency: transitive
+    description:
+      name: image_picker_macos
+      sha256: "1b90ebbd9dcf98fb6c1d01427e49a55bd96b5d67b8c67cf955d60a5de74207c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+2"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      sha256: "886d57f0be73c4b140004e78b9f28a8914a09e50c2d816bdd0520051a71236a0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.1"
+  image_picker_windows:
+    dependency: transitive
+    description:
+      name: image_picker_windows
+      sha256: "6ad07afc4eb1bc25f3a01084d28520496c4a3bb0cb13685435838167c9dcedeb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1+1"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "7f0df31977cb2c0b88585095d168e689669a2cc9b97c309665e3386f3e9d341a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.4"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: "06e98f569d004c1315b991ded39924b21af84cf14cc94791b8aea337d25b57f8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: "6ba465d5d76e67ddf503e1161d1f4a6bc42306f9d66ca1e8f079a47290fb06d3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.1"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16+1"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.0"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "7687075e408b093f36e6bbf6c91878cc0d4cd10f409506f7bc996f68220b9136"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  path:
+    dependency: "direct main"
+    description:
+      name: path
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.0"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.5"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: "6f01f8e37ec30b07bc424b4deabac37cacb1bc7e2e515ad74486039918a37eb7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.10"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "4843174df4d288f5e29185bd6e72a6fbdf5a4a4602717eed565497429f179942"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: c15605cd28af66339f8eb6fbe0e541bfe2d1b72d5825efc6598f3e0a31b9ad27
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.2"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
+  posix:
+    dependency: transitive
+    description:
+      name: posix
+      sha256: "185ef7606574f789b40f289c233efa52e96dead518aed988e040a10737febb07"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.5.0"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      sha256: ea0b925899e64ecdfbf9c7becb60d5b50e706ade44a85b2363be2a22d88117d2
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      sha256: ad47125e588cfd37a9a7f86c7d6356dde8dfe89d071d293f80ca9e9273a33871
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "9955ae474176f7ac8ee4e989dadfb411a58c30415bcfb648fa04b2b8a03afa7f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
+  tflite_flutter:
+    dependency: "direct main"
+    description:
+      name: tflite_flutter
+      sha256: "48e6fde2ad97162bb66a16a142f4c4698add9e8cd397ce9d1cc7451b55537ac1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.11.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "3923c89304b715fb1eb6423f017651664a03bf5f4b29983627c4da791f74a4ec"
+      url: "https://pub.dev"
+    source: hosted
+    version: "14.2.1"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      sha256: b015a8ad1c488f66851d762d3090a21c600e479dc75e68328c52774040cf9226
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.5.0"
+sdks:
+  dart: ">=3.4.0 <4.0.0"
+  flutter: ">=3.22.0"
--- a/pubspec.yaml
+++ b/pubspec.yaml
@ -0,0 +1,29 @@
+name: coin_dex_demo
+description: Coin scan demo — capture, blur check, detect contour, crop.
+publish_to: 'none'
+version: 1.0.0+1
+
+environment:
+  sdk: '>=3.4.0 <4.0.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+  cupertino_icons: ^1.0.6
+  camera: 0.10.6
+  tflite_flutter: ^0.11.0
+  image: ^4.3.0
+  image_picker: ^1.1.2
+  path_provider: ^2.1.4
+  path: ^1.9.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^3.0.0
+
+flutter:
+  uses-material-design: true
+  assets:
+    - assets/ml/detect.tflite
+    - assets/ml/blur.tflite
--- a/test/widget_test.dart
+++ b/test/widget_test.dart
@ -0,0 +1,10 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:coin_dex_demo/main.dart';
+
+void main() {
+  testWidgets('app builds', (tester) async {
+    await tester.pumpWidget(const CoinScanDemoApp());
+    expect(find.text('硬币扫描'), findsOneWidget);
+  });
+}