/// 
        /// Mean value computing.        /// 
        /// The source image.        /// 
             public static double GetMeanProcess(WriteableBitmap src) 32 图像均值计算        {            if (src != null)            {                double mean = 0.0;                int sum = 0;                int gray = 0,number=0;                byte[] temp = src.PixelBuffer.ToArray();                for (int i = 0; i < temp.Length; i += 4)                {                    gray = (int)(temp[i] * 0.114 + temp[i + 1] * 0.587 + temp[i + 2] * 0.299);                    sum += gray;                    number++;                }                mean =(double)(sum/number);                return mean;            }            else            {                return 0;            }        }