[函数代码]

        /// <summary>

        /// Binary process.

        /// </summary>

        /// <param name="src">Source image.</param>

        /// <param name="threshould">Define a threshould value for binary processing, from 0 to 255.</param>

        /// <returns></returns>

        public static WriteableBitmap BinaryProcess(WriteableBitmap src, int threshould)////2 二值化处理

        {

            if(src!=null )

            {

            int w = src.PixelWidth;

            int h = src.PixelHeight;

            WriteableBitmap binaryImage = new WriteableBitmap(w,h);

            byte[] temp = src.PixelBuffer.ToArray();

            for (int i = 0; i < temp.Length; i += 4)

            {

                byte tempByte = (byte)(((temp[i] + temp[i + 1] + temp[i + 2]) / 3) < threshould ? 0 : 255);

                temp[i] = tempByte;

                temp[i + 1] = tempByte;

                temp[i + 2] = tempByte;

            }

            Stream sTemp = binaryImage.PixelBuffer.AsStream();

            sTemp.Seek(0, SeekOrigin.Begin);

            sTemp.Write(temp, 0, w * 4 * h);

            return binaryImage;

             }

            else

            {

                return null;

            }

        }