/** * 价签矫正 */public void getContouresPic (Bitmap source) {    Mat imageSobleOutThreshold = new Mat();    Mat gray = new Mat();    Utils.bitmapToMat(source, imageSobleOutThreshold);    Imgproc.cvtColor(imageSobleOutThreshold, imageSobleOutThreshold, Imgproc.COLOR_BGR2GRAY);    Imgproc.threshold(imageSobleOutThreshold, gray, 125, 225, Imgproc.THRESH_BINARY);//maxVal就是控制黑白反转的,0是黑    //Utils.matToBitmap(gray, source);        ArrayList
       
         rects = new  ArrayList
        
         ();    ArrayList
         
           contours = new ArrayList
          
           ();    Imgproc.findContours(gray, contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_NONE);    for(int i=0;i
           
             500 && rect.width/rect.height == 1) {            MatOfPoint2f mp2f = new MatOfPoint2f(contours.get(i).toArray());            RotatedRect mr = Imgproc.minAreaRect(mp2f);            double area = Math.abs(Imgproc.contourArea(mp2f));            double angle = mr.angle+90;            Mat ratationedImg = new Mat(gray.rows(), gray.cols(), CvType.CV_8UC3);            ratationedImg.setTo(new Scalar(0, 0, 0));            Point center = mr.center;//中心点            Mat m2 = Imgproc.getRotationMatrix2D(center, angle, 1);            Imgproc.warpAffine(imageSobleOutThreshold, ratationedImg, m2, imageSobleOutThreshold.size(), 1, 0, new Scalar(0) );//仿射变换            Utils.matToBitmap(ratationedImg, source);                        File file = new File(Environment.getExternalStorageDirectory()+"/AiLingGong/", "ll"+System.currentTimeMillis()+".jpg");            try {                FileOutputStream out = new FileOutputStream(file);                source.compress(Bitmap.CompressFormat.JPEG, 100, out);                out.flush();                out.close();            } catch (FileNotFoundException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            Log.d("----------------", "旋转角度是:"+angle+"------"+"-----"+mr);        }                }}