[函数名称]

  图像油画效果      OilpaintingProcess(WriteableBitmap src)

[算法说明]

  图像油画效果可以看作是轻度的雾化，因此我们只需将雾化的阈值设置为2即可，雾化效果在下一小节有详细介绍。

[函数代码]

<strong>        /// <summary>
        /// Oil painting process.
        /// </summary>
        /// <param name="src">The source image.</param>
        /// <returns></returns>
        public static WriteableBitmap OilpaintingProcess(WriteableBitmap src)////图像油画效果
        {
            if (src != null)
            {
                int w = src.PixelWidth;
                int h = src.PixelHeight;
                WriteableBitmap srcImage = new WriteableBitmap(w, h);
                byte[] temp = src.PixelBuffer.ToArray();
                byte[] tempMask = (byte[])temp.Clone();
                Random ran = new Random();
                int k = 0;
                int dx = 0;
                int dy = 0;
                for (int j = 0; j < h; j++)
                {
                    for (int i = 1; i < w; i++)
                    {
                        k = ran.Next(2);
                        dx = (i + k) >= w ? w - 1 : (i + k);
                        dy = (j + k) >= h ? h - 1 : (j + k);
                        temp[i * 4 + j * w * 4] = (byte)tempMask[dx * 4 + dy * w * 4];
                        temp[i * 4 + 1 + j * w * 4] = (byte)tempMask[dx * 4 + 1 + dy * w * 4];
                        temp[i * 4 + 2 + j * w * 4] = (byte)tempMask[dx * 4 + 2 + dy * w * 4];
                    }
                }
                Stream sTemp = srcImage.PixelBuffer.AsStream();
                sTemp.Seek(0, SeekOrigin.Begin);
                sTemp.Write(temp, 0, w * 4 * h);
                return srcImage;
            }
            else
            {
                return null;
            }
        }</strong>

[图像效果]