问：System.InvalidOperationException：Xamarin中首先调用初始化（OCR TESSERACT）错误

Question

if (tessResult)始终为假，执行tesseract OCR必须为真，有人可以帮助我吗？

if (!_tesseractApi.Initialized)
    await _tesseractApi.Init("eng"); 

  var photo = await TakePic();
  if (photo != null)
  {
      // When setting an ImageSource using a stream, 
      // the stream gets closed, so to avoid that I backed up
      // the image into a byte array with the following code:
      var imageBytes = new byte[photo.Source.Length];
      photo.Source.Position = 0;
      photo.Source.Read(imageBytes, 0, (int)photo.Source.Length);
      photo.Source.Position = 0;

      var tessResult = await _tesseractApi.SetImage(imageBytes);

      if (tessResult) 
      {
        _takenImage.Source = ImageSource.FromStream(() => photo.Source);
        _recognizedTextLabel.Text = _tesseractApi.Text;
      }
  }
}

Answer 1

将Tesseract火车文件（在您的情况下为英语tesseract火车文件）放在资产文件夹中。

Answer 2

尝试将tessdata导入您的项目：