ml_card_scanner

ml_ card_scanner

The ml_card_scanner plugin allows you to scan bank cards.

Features

• Can scan expiration date, card type and card number
• Work with horizontal and vertical cards
• Powered by Google's Machine Learning models
• Great performance and accuracy
• Fully offline scan makes it a completely secure scanner.

Warning: This package does not guarantee 100% 
accurate scanning of card details, 
so always give users the opportunity 
to check and modify the data before using it.

Prepare

###Android

1. Add these to android/grade.properties file:

android.useAndroidX=true
android.enableJetifier=true

2. In android/app/build.gradle file:

android {
  compileSdkVersion 31 // Set this to at least 31
  minSdkVersion 21 // at least 21
  ...
}

3. Add the permission to android/app/src/main/AndroidManifest.xml file

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  <uses-permission android:name="android.permission.CAMERA"/> 
  ...
 </manifest>

###iOS

Add to ios/Runner/Info.plist file:

<key>NSCameraUsageDescription</key>
<string>Your Description</string>

Add this lines to the top of your Podfile:

# Uncomment this line to define a global platform for your project
 platform :ios, '10.0'

And add the following to end of your Podfile file:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      ... # Here are some configurations automatically generated by flutter

      # You can enable the permissions needed here. For example to enable camera
      # permission, just remove the `#` character in front so it looks like this:
      #
      # ## dart: PermissionGroup.camera
      # 'PERMISSION_CAMERA=1'
      #
      #  Preprocessor definitions can be found in: https://github.com/Baseflow/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',

       
        ## dart: PermissionGroup.camera
         'PERMISSION_CAMERA=1',

        ]

    end
  end
end

Usage

Just import the package and call ml_card_scanner an use ScannerWidget in your code:

ScannerWidget(controller: _controller)

Also ScannerWidget have another parameter you can specify:

• overlayBuilder - set your overlay widget or specify null to use the default;
• overlayTextBuilder - set your widget or specify null to use the default;
• cameraPreviewBuilder - set your widget constraints for CameraPreview or specify null to use the default;
• scannerDelay - set the scan delay or not set to use the default 400 (interval between card scannings in millisecconds);
• oneShotScanning - set to false - the scan will run continuously, true -scaninng will stop after card detected;
• overlayOrientation - set the default overlay orientation, by default portrait;
• cameraResolution - resolution preset for camera, by default high;
• controller - ScannerWidgetController widget controller to get scanned card details or error;
• cardScanTries - how many recognition varians to collect before provide scanning result;
• usePreprocessingFilters - applying built in preprocessing filters to improve recognition quality; would slow down the recognition process, but improve the quality;

See example/lib/ml_card_scanner.dart for implementation.

For ScannerWidgetController have functionality:

• enable or disable scanning;
• enable or disable camera preview;
• set onCardScanned callback;
• set onError callback;

Example Output :

Number card: 5173949390587465
Type: Master Card
Expiry: 10/24