原文:



[函数名称]

图像非线性变换函数NonlinearTransformProcess(WriteableBitmap src,int k ) 

[函数代码]        /// 
        /// Nonlinear transform process.        /// 
        /// The source image.        /// Param to adjust nonlinear transform, from 0 to 255.        /// 
             public static WriteableBitmap NonlinearTransformProcess(WriteableBitmap src,int k )37        {            if (src != null)            {                int w = src.PixelWidth;                int h = src.PixelHeight;                WriteableBitmap linearImage = new WriteableBitmap(w, h);                byte[] temp = src.PixelBuffer.ToArray();                int r = 0, g = 0, b = 0;                for (int i = 0; i < temp.Length; i += 4)                {                    b = (int)(k * Math.Log10(1 + temp[i]));                    g = (int)(k * Math.Log10(1 + temp[i + 1]));                    r = (int)(k * Math.Log10(1 + temp[i + 2]));                    temp[i] = (byte)(b > 0 ? (b < 255 ? b : 255) : 0);                    temp[i + 1] = (byte)(g > 0 ? (g < 255 ? g : 255) : 0);                    temp[i + 2] = (byte)(r > 0 ? (r < 255 ? r : 255) : 0);                              }                Stream sTemp = linearImage.PixelBuffer.AsStream();                sTemp.Seek(0, SeekOrigin.Begin);                sTemp.Write(temp, 0, w * 4 * h);                return linearImage;            }            else            {                return null;            }           }