[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]

        /// 
        /// Oil painting process.        /// 
        /// The source image.        /// 
              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;            }        }

[图像效果]