Flutter MRZ/VIN SDK

A Flutter wrapper for the Dynamsoft Capture Vision SDK, featuring built-in MRZ (Machine Readable Zone) and VIN (Vehicle Identification Number) detection models.

Demo Video

Supported Platforms

✅ Windows
✅ Linux
✅ Android

✅ iOS

Add camera and microphone usage descriptions to ios/Runner/Info.plist:

<key>NSCameraUsageDescription</key>
<string>Can I use the camera please?</string>
<key>NSMicrophoneUsageDescription</key>
<string>Can I use the mic please?</string>

✅ Web

In index.html, include:

<script src="https://cdn.jsdelivr.net/npm/dynamsoft-capture-vision-bundle@2.6.1000/dist/dcv.bundle.min.js"></script>

Prerequisites

A valid Dynamsoft Capture Vision license key

Getting Started

Set the license key in example/lib/global.dart:

Future<int> initSDK() async {
  int? ret = await detector.init(
      "LICENSE-KEY");
  ...
}

Run the example project on your desired platform:

cd example
flutter run -d chrome    # Run on Web
flutter run -d linux     # Run on Linux
flutter run -d windows   # Run on Windows
flutter run              # Run on default connected device (e.g., Android)

API Reference

Method	Description	Parameters	Return Type
`Future<int?> init(String key)`	Initializes the OCR SDK with a license key.	`key`: License string	`Future<int?>`
`Future<List<List<OcrLine>>?> recognizeBuffer(Uint8List bytes, int width, int height, int stride, int format, int rotation)`	Performs OCR on a raw image buffer.	`bytes`: RGBA image buffer `width`, `height`: Image dimensions `stride`: Row bytes `format`: Pixel format index `rotation`: 0/90/180/270	`Future<List<List<OcrLine>>?>`
`Future<List<List<OcrLine>>?> recognizeFile(String filename)`	Performs OCR on an image file.	`filename`: Path to the image file	`Future<List<List<OcrLine>>?>`
`Future<int?> loadModel({ModelType modelType = ModelType.mrz})`	Loads the OCR model by type (`mrz` or `vin`).	`modelType`: Optional, defaults to `ModelType.mrz`	`Future<int?>`