Android Mobile Vision文本识别缩放到找到的坐标

Question

我正在使用Googles Mobile Vision API识别静态位图中的文本(数字).现在我想放大到找到号码的地方.

这就是我扫描Bitmap并获取x和y坐标的方法

Point [] p = textBlock.getCornerPoints();

public void Test(Bitmap bitmap) {
    Context context = getApplicationContext();
    TextRecognizer ocrFrame = new TextRecognizer.Builder(context).build();
    Frame frame = new Frame.Builder().setBitmap(bitmap).build();
    ByteBuffer byteBuffer = frame.getGrayscaleImageData();

    if (ocrFrame.isOperational()) {
        Log.e(TAG, "Textrecognizer is operational");
    }
    SparseArray<TextBlock> textBlocks = ocrFrame.detect(frame);

    for (int i = 0; i < textBlocks.size(); i++) {
        TextBlock textBlock = textBlocks.get(textBlocks.keyAt(i));
        String value = textBlock.getValue();
        Point[] p = textBlock.getCornerPoints();
        Log.e(TAG, "something is happening");
    }
}

此外,我使用TouchImageView显示位图.现在我用我获得的坐标调用setZoom方法,如下所示:

touchImageView.setZoom(1F,210F,748F,ImageView.ScaleType.CENTER);

但它缩放到错误的地方,我不知道为什么.有人可以给我一些提示吗？

(https://github.com/MikeOrtiz/TouchImageView/blob/master/src/com/ortiz/touch/TouchImageView.java)

编辑:好的,我发现缩放类型做了我没有得到的东西.我想这里的问题是setZoom.我必须将位图的坐标转换为Touchimageview的坐标.

EDIT2:解决方案:错误是直接传递x和y坐标,但setZoom取0到1之间的值

int BitmapHeight = photo.getHeight();
                                int BitmapWidth = photo.getWidth();

                                int FoundX = p[0].x;
                                int FoundY = p[0].y;

                                float DividerX = BitmapWidth / (float)FoundX;
                                float DividerY = BitmapHeight / (float)FoundY;

                                float ZoomX = 1 / (float)DividerX;
                                float ZoomY = 1 / (float)DividerY;

                                touchImageView.setZoom(touchImageView.getMaxZoom(), ZoomX, ZoomY, ImageView.ScaleType.CENTER);

Answer 1

您可以使用这个谷歌库https://developers.google.com/vision/android/text-overview。您可以在这里找到示例https://codelabs.developers.google.com/codelabs/mobile-vision-ocr

通过在 android gradle 文件中添加以下内容

compile 'com.google.android.gms:play-services-vision:15.0.0'