flutter_ocr_sdk 0.1.0

A wrapper for Dynamsoft OCR SDK, detecting MRZ in passports, travel documents, and ID cards.

flutter_ocr_sdk

A wrapper for Dynamsoft OCR SDK. It helps developers build Flutter applications to detect machine-readable zones (MRZ) in passports, travel documents, and ID cards.

Try MRZ Detection Example

cd example
flutter run -d <device>

Usage

• Download the model folder to your project, and configure assets in pubspec.yaml:

  assets:
      - model/
  

• Initialize the MRZ detector with a valid license key:

  FlutterOcrSdk _mrzDetector = FlutterOcrSdk();
  int? ret = await _mrzDetector.init("",
      "DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ==");
  

• Load the MRZ detection model:

  await _mrzDetector.loadModel('model/');
  

• Recognize and parse MRZ information from an image file:

  String? json = await _mrzDetector.recognizeByFile(photo.path);
  String results = getTextResults(json);
  
  String getTextResults(String json) {
      StringBuffer sb = StringBuffer();
      List<dynamic>? obj = jsonDecode(json)['results'];
      if (obj != null) {
          for (dynamic tmp in obj) {
              List<dynamic> area = tmp['area'];
  
              if (area.length == 2) {
                  String line1 = area[0]['text'];
                  String line2 = area[1]['text'];
                  return MRZ.parseTwoLines(line1, line2).toString();
              } else if (area.length == 3) {
                  String line1 = area[0]['text'];
                  String line2 = area[1]['text'];
                  String line3 = area[2]['text'];
                  return MRZ.parseThreeLines(line1, line2, line3).toString();
              }
          }
      }
  
      return 'No results';
  }