c# 使用OpenCV识别硬币

public class CoinDetector
 {
  private Mat _image;
  private Mat _originalImage;
  private string _pathToFile;

  public CoinDetector(string pathToFile)
  {
   _pathToFile = pathToFile;
  }

  public void ImagePreprocessing()
  {
   _image = new Mat(_pathToFile, ImreadModes.Color);
   _originalImage = _image.Clone();
   TransformGrayScale();
   TransformGaussianBlur();
   HoughSegmentation();
  }

  private void TransformGrayScale()
  {
   _image = _originalImage.CvtColor(ColorConversionCodes.BGR2GRAY);
   new Window("Grayed Coins", WindowMode.Normal, _image);
   Cv2.WaitKey();
  }

  private void TransformGaussianBlur()
  {
   Cv2.GaussianBlur(_image, _image, new Size(0, 0), 1);
   new Window("Blurred Coins", WindowMode.Normal, _image);
   //Cv2.WaitKey();
  }

  private void HoughSegmentation()
  {
   Mat result = _image.Clone();

   var circleSegments = Cv2.HoughCircles(_image, HoughMethods.Gradient, 1.02, 40);
   for (int i = 0; i < circleSegments.Length; i++)
   {
    Cv2.Circle(result, (Point) circleSegments[i].Center, (int)circleSegments[i].Radius, new Scalar(255, 255, 0), 2);
   }

   using (new Window("Circles", result))
   {
    Cv2.WaitKey();
   }
  }
 }

 string filePath = @"C:/Users/arnal/Documents/coins.jpg";
 var coinDetector = new CoinDetector(filePath);
 coinDetector.ImagePreprocessing();