保存圆圈的边界矩形OpenCV Android

Question

您好我正在使用HoughCircle来检测圆圈我还创建了一个边框来显示圆圈的轮廓我现在想要做的是抓取边界框内的图像并将它们保存到文件或位图

这是我的代码

            // accumulator value
            double dp = 1;
            // minimum distance between the center coordinates of detected circles in pixels
            double minDist = gray_src.rows() / 8;
            // min and max radiuis
            int minRadius = 0, maxRadius = 500;
            //Last two
            double iCanny = 100, accum = 25;

            // create a Mat object to store the circles detected
            Mat circles = new Mat();

            // find the circle in the image
            Imgproc.HoughCircles(outlineThick, circles, Imgproc.CV_HOUGH_GRADIENT, dp, minDist, iCanny, accum, minRadius, maxRadius);

            // get the number of circles detected
            int numberOfCircles = (circles.rows() == 0) ? 0 : circles.

            // int x = (int) circleCoordinates[0], y = (int) circleCoordinates[1];
            Point pt;


            Rect[] roiArray = new Rect[numberOfCircles];
            for (int i = 0; i < numberOfCircles; i++) {
                double circleCoordinates[] = circles.get(0, i);
                pt = new Point(Math.round(circleCoordinates[0]), Math.round(circleCoordinates[1]));
                //circle's outline
                int radius = (int) Math.round(circleCoordinates[2]);
                Log.d("LOG", "Circle: X=" + Double.toString(circleCoordinates[0]) + " Y=" + Double.toString(circleCoordinates[1]));
                Imgproc.circle(src, pt, radius, new Scalar(0, 255, 0), 2, 8, 0);
                Imgproc.rectangle(src, new Point(pt.x - (radius + 1), pt.y - (radius + 1)), new Point(pt.x + (radius + 1), pt.y + (radius + 1)), new Scalar(255, 0, 0), 2);
                Rect roi = new Rect(new Point(pt.x - (radius + 1), pt.y - (radius + 1)), new Point(pt.x + (radius + 1), pt.y + (radius + 1)));
                roiArray[i] = roi;
            }

我尝试过使用像submat(dst,mask);之类的东西，但是当我保存图像时我得到的只是全尺寸图像而不是裁剪版本

非常感谢任何帮助