WPF：图像处理（二）灰度化(2)

                new FormatConvertedBitmap(bitmap, PixelFormats.Bgr32, null, 0).CopyPixels(Pixels, Stride, 0); 
            } 
 
            // 将像素数据转换为彩色数组 
            Color[,] ColorArray = new Color[PixelHeight, PixelWidth]; 
            for (Int32 i = 0; i < PixelHeight; i++) 
            { 
                for (Int32 j = 0; j < PixelWidth; j++) 
                { 
                    Int32 Index = i * Stride + (j << 2); 
                    ColorArray[i, j].B = Pixels[Index]; 
                    ColorArray[i, j].G = Pixels[Index + 1]; 
                    ColorArray[i, j].R = Pixels[Index + 2]; 
                    ColorArray[i, j].A = Pixels[Index + 3]; 
                } 
            } 
 
            return ColorArray; 
        } 
 
        /// <summary> 
        /// 将位图转换为灰度数组（256级灰度） 
        /// </summary> 
        /// <param name="bitmap">原始位图</param> 
        /// <returns>灰度数组</returns> 
        /// <remarks>扩展方法</remarks> 
        public static Byte[,] ToGrayArray(this BitmapSource bitmap) 
        {   // 将像素格式统一到Bgr32，并提取图像数据 
            Int32 PixelHeight = bitmap.PixelHeight; // 图像高度