本文实例讲述了C#数字图象处理之肤色检测的方法。分享给大家供大家参考。具体如下：

//定义肤色检测函数（可供人脸检测等研究使用）public Bitmap SkinDetect1(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 r, g, Fupr,Flor,Wrg; for (int y = 0; y < a.Height; y++) { for (int x = 0; x < a.Width; x++) { P = pIn; B = P[0]; G = P[1]; R = P[2]; if (R + G + B == 0) { r = 0; g = 0; } else { r = (R / (R + G + B)); g = (G / (R + G + B)); } Fupr = (1.0743 * r + 0.1452-1.3767 * r * r) ; Flor = (0.5601 * r + 0.1766-0.776 * r * r); Wrg = (r - 0.33) * (r - 0.33) + (g - 0.33) * (g - 0.33); if ((R - G >= 45) && ((R > G) && (G > B)) && (Fupr > g) && (Wrg >= 0.0004)) { P[0] = (byte)B; P[1] = (byte)G; P[2] = (byte)R; } else { P[0] = 0; P[1] = 0; P[2] = 0; } pIn += 3; } pIn += stride - a.Width * 3; } } a.UnlockBits(bmpData); return a;}

效果图像：

希望本文所述对大家的C#程序设计有所帮助。