1、Hough变换找线
原理不再赘述
2、Hough圆变换
直接上代码:
case "霍夫圆变换":
{
CircleSegment[] circles;
OpenCvSharp.Size size = new OpenCvSharp.Size(output.Width, output.Height);
Mat image_out3 = new Mat(size, MatType.CV_8UC3);
Cv2.CvtColor(input, output, ColorConversionCodes.RGB2GRAY);
circles = Cv2.HoughCircles(output, HoughMethods.Gradient, 1,20,100,30, 1, 1000);
Mat dst = new Mat();
input.CopyTo(dst);
for (int i = 0; i < circles.Length; i++)
{
//圆
Cv2.Circle(dst, (int)circles[i].Center.X,(int)circles[i].Center.Y, (int)circles[i].Radius, new Scalar(0, 255, 0), 2, LineTypes.AntiAlias);
//圆心显示
Cv2.Circle(dst, (int)circles[i].Center.X, (int)circles[i].Center.Y, 3, new Scalar(0, 255, 0), 2, LineTypes.Link8);
}
using (new Window("OutputImage", WindowMode.AutoSize, dst)) ;
Cv2.WaitKey();
break;
直接从switch-case截取的代码,删掉首位两行放入一个方法中应该可以
效果图: