WPF：图像处理（二）灰度化(5)

                    Int32 Index = i * Stride + (j << 2); 
                    GrayPixels[i * GrayStride + j] = Convert.ToByte((Pixels[Index + 2] * 19595 + Pixels[Index + 1] * 38469 + Pixels[Index] * 7471 + 32768) >> 16); 
                } 
            } 
 
            // 从灰度数据中创建灰度图像 
            return BitmapSource.Create(PixelWidth, PixelHeight, 96, 96, PixelFormats.Indexed8, BitmapPalettes.Gray256, GrayPixels, GrayStride); 
        }      
 
        /// <summary> 
        /// 将灰度数组转换为灰度图像（256级灰度） 
        /// </summary> 
        /// <param name="grayArray">灰度数组</param> 
        /// <returns>灰度图像</returns> 
        public static BitmapSource GrayArrayToGrayBitmap(Byte[,] grayArray) 
        {   // 将灰度数组转换为灰度数据 
            Int32 PixelHeight = grayArray.GetLength(0);     // 图像高度 
            Int32 PixelWidth = grayArray.GetLength(1);      // 图像宽度 
            Int32 Stride = ((PixelWidth + 3) >> 2) << 2;        // 扫描行跨距 
            Byte[] Pixels = new Byte[PixelHeight * Stride]; 
            for (Int32 i = 0; i < PixelHeight; i++) 
            { 
                for (Int32 j = 0; j < PixelWidth; j++) 
                { 
                    Pixels[i * Stride + j] = grayArray[i, j]; 
                }