opencvsharp提取拐点并输出角点坐标

要使用OpenCvSharp提取拐点并输出角点坐标，可以按照以下步骤进行：

1. 导入OpenCvSharp库

using OpenCvSharp;

2. 读取图像

Mat image = Cv2.ImRead("image.jpg", ImreadModes.Color);

3. 灰度化图像

Mat grayImage = new Mat();
Cv2.CvtColor(image, grayImage, ColorConversionCodes.BGR2GRAY);

4. 提取角点

Mat cornerImage = new Mat();
Cv2.CornerHarris(grayImage, cornerImage, 2, 3, 0.04);

5. 标记角点并输出坐标

for (int y = 0; y < cornerImage.Rows; y++)
{
    for (int x = 0; x < cornerImage.Cols; x++)
    {
        if (cornerImage.At<float>(y, x) > 0.01)
        {
            Cv2.Circle(image, x, y, 5, new Scalar(0, 0, 255), 2);
            Console.WriteLine("Corner found at ({0},{1})", x, y);
        }
    }
}

6. 显示图像

Cv2.ImShow("Corner Detection", image);
Cv2.WaitKey(0);

完整代码如下：

using System;
using OpenCvSharp;

namespace CornerDetection
{
    class Program
    {
        static void Main(string[] args)
        {
            Mat image = Cv2.ImRead("image.jpg", ImreadModes.Color);
            Mat grayImage = new Mat();
            Cv2.CvtColor(image, grayImage, ColorConversionCodes.BGR2GRAY);
            Mat cornerImage = new Mat();
            Cv2.CornerHarris(grayImage, cornerImage, 2, 3, 0.04);

            for (int y = 0; y < cornerImage.Rows; y++)
            {
                for (int x = 0; x < cornerImage.Cols; x++)
                {
                    if (cornerImage.At<float>(y, x) > 0.01)
                    {
                        Cv2.Circle(image, x, y, 5, new Scalar(0, 0, 255), 2);
                        Console.WriteLine("Corner found at ({0},{1})", x, y);
                    }
                }
            }

            Cv2.ImShow("Corner Detection", image);
            Cv2.WaitKey(0);
        }
    }
}