C#图像处理之头发检测的方法

本文实例讲述了c#图像处理之头发检测的方法。分享给大家供大家参考。具体如下：

//发色检测（ycbcr颜色空间）
public bitmap haird(bitmap a)
{
  rectangle rect = new rectangle(0, 0, a.width, a.height);
  system.drawing.imaging.bitmapdata bmpdata = a.lockbits(rect, system.drawing.imaging.imagelockmode.readwrite, system.drawing.imaging.pixelformat.format24bpprgb);
  int stride = bmpdata.stride;
  unsafe
  {
   byte* pin = (byte*)bmpdata.scan0.topointer();
   byte* p;
   int r, g, b;
   double cr, cb,brightv;
   for (int y = 0; y < a.height; y++)
   {
     for (int x = 0; x < a.width; x++)
     {
     p = pin;
     r = p[2];
     g = p[1];
     b = p[0];
     cb = 128 - 37.797 * r / 255 - 74.203 * g / 255 + 112 * b / 255;
     cr = 128 + 112 * r / 255 - 93.768 * g / 255 - 18.214 * b / 255;
     brightv = (r + g + b) / 3;
     if (!(cb >= 115 && cb <= 141 && cr >= 115 && cr <= 143 && (r < 35)))
     {
       pin[0] = (byte)255;
       pin[1] = (byte)255;
       pin[2] = (byte)255;
     }
     pin += 3;
     }
     pin += stride - a.width * 3;
   }
  }
  a.unlockbits(bmpdata);
  return a;
}
//定义最小值函数
public double min(double a, double b, double c)
{
  double e = (a <= b ? a : b) <= c ? (a <= b ? a : b) : c;
  return e;
}
//定义最大值函数
public int max(int a, int b, int c)
{
  int e = (a >= b ? a : b) <= c ? c : (a >= b ? a : b);
  return e;
}

结果图像效果：

希望本文所述对大家的c#程序设计有所帮助。