OpenCV如何使用Hough transformin Java检测作物圈

Question

我想裁剪我使用霍夫变换检测到的圆圈，我成功检测到圆圈，但我不明白如何裁剪它们。 这是我用于霍夫变换的代码：

for( int i=0;i<circles.cols();i++){
            Point center = new Point( Math.round(circles.get(0,i)[0]), 
            Math.round(circles.get(0, i)[1]));                      
            System.out.println("X============="+i+":"+circles.get(0,i)[0]);                                
            System.out.println("Y============="+i+":"+circles.get(0,i)[1]);
            int radius = (int) Math.round(circles.get(0, i)[2]);
            //System.out.println("--Rayon--:"+radius);
            Imgproc.circle( image, center, radius, new Scalar(0,0,255),3);//radius, color)   `

Answer 1

您可以裁剪如下图像：

Mat initialImage = ...
Rect crop = new Rect(new Point(column,row),new Size(width,height)); // crop area begins at Point(column,row) with Size(width,height)
Mat croppedImage = new Mat(initialImage,crop);