Android Opencv 图片裁剪

 

            Mat m = new Mat();
            Utils.bitmapToMat(bitmap_src, m);
            Mat r = reSizeMat(m);
            Bitmap b = Bitmap.createBitmap(r.cols(), r.rows(),
                    Bitmap.Config.ARGB_8888);
            Utils.matToBitmap(r, b);
            imageView3.setImageBitmap(b);

    private Mat reSizeMat(Mat src){
        Rect rect=new Rect(0,0,500,500);

        Mat result=new Mat(src,rect);
        return result;
    }