//采用二值化图像，图像中黑色表示背景，白色表示目标
//定义质心计算函数
private int[] CentPoints(Bitmap src)
{
  //定义存储质心坐标的数组变量
  int[] CentreP = new int[2];
  int M00 = 0, M01 = 0, M10 = 0;
  Rectangle rect = new Rectangle(0, 0, src.Width, src.Height);
  System.Drawing.Imaging.BitmapData bmpData = src.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
  unsafe
  {
 int stride = bmpData.Stride;
 byte* p;
 byte* pIn = (byte*)bmpData.Scan0.ToPointer();
 int R, G, B;
 for (int y = 0; y < src.Height; y++)
 {
   for (int x = 0; x < src.Width; x++)
   {
 p = pIn;
 R = p[2];
 G = p[1];
 B = p[0];
 if (R + G + B != 0)
 {
   M00++;
   M01 += y;
   M10 += x;
 }
 pIn += 3;
   }
   pIn += stride - src.Width * 3;
 }
 CentreP[0] = (int)(M10 / M00);
 CentreP[1] = (int)(M01 / M00);
  }
  src.UnlockBits(bmpData);
  return CentreP;
  //返回一个数组，该数组中第一个元素是质心的X坐标，
  //第二个元素是质心的Y坐标
}