Win8Metro(C#)数字图像处理--2.8图像线性变换

2.8图像线性变换

[函数名称]

图像线性变换函数LinearTransformProcess(WriteableBitmap src, double k,int v)

[函数代码]

       ///<summary>

       /// Linear transform process(f=kf+v).

       ///</summary>

       ///<param name="src">Source image.</param>

       ///<param name="k">Parameter,from 0 to 5.</param>

       ///<param name="v">Parameter,from -128 to 128.</param>

       ///<returns></returns>

       publicstaticWriteableBitmap LinearTransformProcess(WriteableBitmap src,double k,int v)////8线性变换处理

       {

           if(src!=null )

           {

           int w = src.PixelWidth;

           int h = src.PixelHeight;

           WriteableBitmap linearImage =newWriteableBitmap(w,h);

           byte[] temp = src.PixelBuffer.ToArray();

           for (int i = 0; i < temp.Length; i +=4)

           {

               temp[i] = (byte)(((k * temp[i] + v + 0.5) > 255 ? 255 : (k * temp[i] + v + 0.5)) < 0 ? 0 : ((k * temp[i] + v + 0.5) > 255 ? 255 : (k * temp[i] + v + 0.5)));

               temp[i+1] = (byte)(((k * temp[i+1] + v + 0.5) > 255 ? 255 : (k * temp[i+1] + v + 0.5)) < 0 ? 0 : ((k * temp[i+1] + v + 0.5) > 255 ? 255 : (k * temp[i+1] + v + 0.5)));

               temp[i+2] = (byte)(((k * temp[i+2] + v + 0.5) > 255 ? 255 : (k * temp[i+2] + v + 0.5)) < 0 ? 0 : ((k * temp[i+2] + v + 0.5) > 255 ? 255 : (k * temp[i+2] + v + 0.5)));

           }

           Stream sTemp = linearImage.PixelBuffer.AsStream();

           sTemp.Seek(0,SeekOrigin.Begin);

           sTemp.Write(temp, 0, w * 4 * h);

           return linearImage;

           }

           else

           {

               returnnull;

           }  

       }

[图像效果]