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]