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我正在创建一个可以通过相机捕获图像并可以使用 tess-two android 库提取图像中的文本的应用程序。

代码工作正常，直到我添加了裁剪图像的选项。裁剪图像后，在线上发生错误

tessbaseAPI.setImage(bitmap)

日志说

Failed to read bitmap

下面是我裁剪图像的代码

private void performCrop() {
    // take care of exceptions
    try {
        Log.v(TAG, "Inside try of performCrop");
        // call the standard crop action intent (the user device may not
        // support it)
        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        // indicate image type and Uri
        cropIntent.setDataAndType(picUri, "image/*");
        // set crop properties
        cropIntent.putExtra("crop", "true");
        // indicate aspect of desired crop
        cropIntent.putExtra("aspectX", 2);
        cropIntent.putExtra("aspectY", 1);
        // indicate output X and Y
        cropIntent.putExtra("outputX", 256);
        cropIntent.putExtra("outputY", 256);
        // retrieve data on return
        cropIntent.putExtra("return-data", true);
        // start the activity - we handle returning in onActivityResult
        Log.v(TAG, "Going to onActivityResult now");
        startActivityForResult(cropIntent, CROP_PIC);
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        Toast toast = Toast
                .makeText(this, "This device doesn't support the crop action!", Toast.LENGTH_SHORT);
        toast.show();
    }
}

并用于执行 OCR

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        String state = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(state)) {
            if (requestCode == REQUEST_IMAGE_CAPTURE) {
                Log.v(TAG, "Request Code is REQUEST_IMAGE_CAPTURE");
                picUri = data.getData();
                performCrop();
            } else if (requestCode == CROP_PIC) {
                Log.v(TAG, "Request Code is CROP_PIC");
                Bundle extras = data.getExtras();
                Bitmap bitmap = extras.getParcelable("data");
                TextView res = (TextView) findViewById(R.id.hello);
                //imageView.setImageBitmap(imageBitmap);
                //Image image = ImageIO.read(imageFile);
                //BufferedImage buffimg = (BufferedImage) image;
                //BufferedImage img = ImageHelper.convertImageToGrayscale(buffimg);
                //ITesseract instance = new Tesseract();  // JNA Interface Mapping
                //ITesseract instance = new Tesseract1(); // JNA Direct Mapping

                //TessDataManager.initTessTrainedData(context);
                if (isStoragePermissionGranted() == true) {
                    TessBaseAPI tessBaseAPI = new TessBaseAPI();

                    String path = Environment.getExternalStorageDirectory() + "/";
                    //String path = "/mnt/sdcard/";

                    tessBaseAPI.setDebug(true);
                    tessBaseAPI.init(path, "eng");


                    tessBaseAPI.setImage(bitmap);

                    String text = tessBaseAPI.getUTF8Text();
                    tessBaseAPI.end();
                    res.setText(text);
                }
            }} else {
                TextView res = (TextView) findViewById(R.id.hello);
                res.setText("Well damn");
            }
        }

    }

日志中的一行

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.example.abc.snaptravel/com.example.abc.snaptravel.MainActivity}: java.lang.RuntimeException: Failed to read bitmap

我将不胜感激。谢谢！

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1 回答 1

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好吧，出现了很多问题。总的来说，我认为主要问题是我无法访问我的 SD 卡。我在某处读到，很难在 HTC 型号中访问 SD 卡，而我只使用 HTC 型号。

我通过将裁剪的图像保存在内部存储器中然后将该路径提供给tessbaseAPI.setImage(File file)

裁剪功能变成了这个 -

private void performCrop() {
    // take care of exceptions
    try {
        Log.v(TAG, "Inside try of performCrop");
        // call the standard crop action intent (the user device may not
        // support it)
        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        // indicate image type and Uri
        cropIntent.setDataAndType(picUri, "image/*");
        // set crop properties
        cropIntent.putExtra("crop", "true");
        // indicate aspect of desired crop
        cropIntent.putExtra("aspectX", 2);
        cropIntent.putExtra("aspectY", 1);
        // indicate output X and Y
        cropIntent.putExtra("outputX", 256);
        cropIntent.putExtra("outputY", 256);
        File dir=
                Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

        output=new File(dir, "CameraContentDemo.jpg");
        cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(output));
        // retrieve data on return
        cropIntent.putExtra("return-data", false);
        // start the activity - we handle returning in onActivityResult
        Log.v(TAG, "Going to onActivityResult now");
        startActivityForResult(cropIntent, CROP_PIC);
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        Toast toast = Toast
                .makeText(this, "This device doesn't support the crop action!", Toast.LENGTH_SHORT);
        toast.show();
    }
}

onActivityResult() 变成了这个 -

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        String state = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(state)) {
            if (requestCode == REQUEST_IMAGE_CAPTURE) {
                Log.v(TAG, "Request Code is REQUEST_IMAGE_CAPTURE");
                picUri = data.getData();
                performCrop();
            } else if (requestCode == CROP_PIC) {
                Log.v(TAG, "Request Code is CROP_PIC");
                Bundle extras = data.getExtras();
                //Bitmap bitmap = (Bitmap)extras.get("data");
                TextView res = (TextView) findViewById(R.id.hello);
                ImageView im = (ImageView)findViewById(R.id.imageView);
                //im.setImageBitmap(bitmap);
                //imageView.setImageBitmap(imageBitmap);
                //Image image = ImageIO.read(imageFile);
                //BufferedImage buffimg = (BufferedImage) image;
                //BufferedImage img = ImageHelper.convertImageToGrayscale(buffimg);
                //ITesseract instance = new Tesseract();  // JNA Interface Mapping
                //ITesseract instance = new Tesseract1(); // JNA Direct Mapping

                //TessDataManager.initTessTrainedData(context);
                if (isStoragePermissionGranted() == true) {
                    TessBaseAPI tessBaseAPI = new TessBaseAPI();

                    String path = Environment.getExternalStorageDirectory() + "/";
                    //String path = "/mnt/sdcard/";

                    tessBaseAPI.setDebug(true);
                    tessBaseAPI.init(path, "eng");
                    File file = new File(picUri.getPath());
                    tessBaseAPI.setImage(output);

                    String text = tessBaseAPI.getUTF8Text();
                    tessBaseAPI.end();
                    res.setText(text);
                }
            }} else {
                TextView res = (TextView) findViewById(R.id.hello);
                res.setText("Well damn");
            }
        }

    }

请注意，我已经这样做了 -

cropIntent.putExtra("return-data", false);

当我们提供存储它的文件时，我们不需要来自此函数的数据。

于 2016-08-15T08:11:57.797 回答