firebase - 如何使用ML Kit云文字识别器进行拍打？

Question

我在项目中使用软件包“firebase_ml_vision”进行OCR。我可以阅读基于拉丁语的语言，但是我想阅读汉字。我知道在设备和基于云的文本识别器版本上都有。但是，我找不到如何在应用程序中“启用”基于云的版本。我已经在Firebase中激活了基于云的API，如下图所示:
Activated cloud apis

我当前使用的代码是:

void _initializeVision() async{
final File imageFile = File(imagePath);
final FirebaseVisionImage visionImage = FirebaseVisionImage.fromFile(imageFile);


final TextRecognizer textRecognizer = FirebaseVision.instance.textRecognizer();
final VisionText visionText = await textRecognizer.processImage(visionImage);



for(TextBlock blocks in visionText.blocks){
  for(TextLine line in blocks.lines){
    print(line.text);
  }
}}

Image I try to read

结果:

I/flutter (10432): FamilyMart Collection
I/flutter (10432): 10
I/flutter (10432): Pocket facial tissue
I/flutter (10432): Without fluorescent virgin fber from wood puip
I/flutter (10432): pampers your skin

谁能向我解释如何为Flutter使用云文本识别器？

Answer 1

有同样的问题，不要认为cloud-OCR当前可以与ML-Package一起使用。我设法通过POST请求使其工作。
这是您需要的一切:Make Vision API request

// Upload Image to Firebase and get
// 1. DownloadUrl or 
// 2. StorageBucket or
//
// 3. Convert Image to base64 with
// String base64Image = base64Encode(File(imagePath).readAsBytesSync());
// (does not work for me, if you use this way make sure your `body` is correct)

String body = """{
  'requests': [
    {
      'image': {
        'source': {
          'imageUri': '$downloadUrl'
        }
      },
      'features': [
        {
          'type': 'DOCUMENT_TEXT_DETECTION'
        }
      ]
    }
  ]
}""";

http.Response res = await http
  .post(
    "https://vision.googleapis.com/v1/images:annotate?key=$API_KEY",
    body: body
  );

print("${res.body}");