opencvSharp 学习笔记（三）

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：