Android-Ocr 在人像中使用 Tesseract

Question

我在此链接中使用了 ocr 示例 https://github.com/rmtheis/android-ocr 一切正常，但我想在纵向 View 中使用它，我按照此链接中的步骤操作，Zxing Camera in Portrait mode on Android , 在纵向模式下启用 ocr 测试。 View 现在是纵向的，但相机仍在以横向模式拍照。

有什么帮助吗？

  final class PreviewCallback implements Camera.PreviewCallback {

  private static final String TAG = PreviewCallback.class.getSimpleName();

  private final CameraConfigurationManager configManager;
  private Handler previewHandler;
  private int previewMessage;

  PreviewCallback(CameraConfigurationManager configManager) {
  this.configManager = configManager;
  }

  void setHandler(Handler previewHandler, int previewMessage) {
  this.previewHandler = previewHandler;
  this.previewMessage = previewMessage;
  }

 // (NV21) format.
 @Override
  public void onPreviewFrame(byte[] data, Camera camera) {
  Point cameraResolution = configManager.getCameraResolution();
  Handler thePreviewHandler = previewHandler;
  if (cameraResolution != null && thePreviewHandler != null) {
  Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
      cameraResolution.y, data);
   message.sendToTarget();
   previewHandler = null;
   } else {
    Log.d(TAG, "Got preview callback, but no handler or resolution available");
   }
   }

Answer 1

您是否通过此方法使用预览数据:

public void onPreviewFrame(byte[] data, Camera camera) {}

如果是，那么我可以帮助你，因为我正在做非常相似的项目(即将开源)

这是我用来旋转预览图像的代码

public static Bitmap getBitmapImageFromYUV(byte[] data, int width,
        int height, int degree, Rect rect) {
    Bitmap bitmap = getBitmapImageFromYUV(data, width, height, rect);
    return rotateBitmap(bitmap, degree,rect);

}

public static Bitmap rotateBitmap(Bitmap source, float angle, Rect rect) {
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);

    source = Bitmap.createBitmap(source, 0, 0, source.getWidth(),
            source.getHeight(), matrix, true);
    source = Bitmap.createBitmap(source, rect.left, rect.top, rect.width(), rect.height());

    if(mShouldSavePreview)
        saveBitmap(source);
    return source;

}

public static Bitmap getBitmapImageFromYUV(byte[] data, int width,
        int height, Rect rect) {
    YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21, width, height,
            null);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    yuvimage.compressToJpeg(new Rect(0, 0, width, height), 90, baos);

    byte[] jdata = baos.toByteArray();
    BitmapFactory.Options bitmapFatoryOptions = new BitmapFactory.Options();
    bitmapFatoryOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;
    Bitmap bmp = BitmapFactory.decodeByteArray(jdata, 0, jdata.length,
            bitmapFatoryOptions);

    Log.d(TAG,"getBitmapImageFromYUV w:"+bmp.getWidth()+" h:"+bmp.getHeight());


    return bmp;
}