Win8Metro(C#)数字图像处理--2.11图像锐化

原文:Win8Metro(C#)数字图像处理--2.11图像锐化



[函数名称]

图像锐化函数SharpeningProcess(WriteableBitmap
src,double sharpenValue)

[函数代码]

///<summary>

///
Sharpening process.

///</summary>

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

///<returns></returns>

publicstaticWriteableBitmap
SharpeningProcess(WriteableBitmap src)////11锐化处理

{

if(src!=null
)

{

int
w = src.PixelWidth;

int
h = src.PixelHeight;

WriteableBitmap
sharpenImage =newWriteableBitmap(w,h);

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

byte[]
tempMask = (byte[])temp.Clone();

double
b = 0, g = 0, r = 0, srR = 0, srG = 0, srB = 0;

for
(int j = 1; j < h - 1; j++)

{

for
(int i = 4; i < w * 4 - 4; i += 4)

{

srB = tempMask[i + j * w * 4];

srG = tempMask[i + 1 + j * w * 4];

srR = tempMask[i + 2 + j * w * 4];

b =Math.Abs(5
* srB - tempMask[i - 4 + j * w * 4] - tempMask[i + 4 + j * w * 4] - tempMask[i + (j - 1) * w * 4] - tempMask[i + (j + 1) * w * 4]);

g =Math.Abs(5
* srG - tempMask[i - 4 + 1 + j * w * 4] - tempMask[i + 4 + 1 + j * w * 4] - tempMask[i + 1 + (j - 1) * w * 4] - tempMask[i + 1 + (j + 1) * w * 4]);

r =Math.Abs(5
* srR - tempMask[i - 4 + 2 + j * w * 4] - tempMask[i + 4 + 2 + j * w * 4] - tempMask[i + 2 + (j - 1) * w * 4] - tempMask[i + 2 + (j + 1) * w * 4]);

temp[i + j * w * 4] = (byte)(b
> 0 ? (b < 255 ? b : 255) : 0);

temp[i + 1 + j * w * 4] = (byte)(g
> 0 ? (g < 255 ? g : 255) : 0);

temp[i + 2 + j * w * 4] = (byte)(r
> 0 ? (r < 255 ? r : 255) : 0);

b = 0; g = 0; r = 0; srR = 0; srG = 0; srB = 0;

}

}

Stream
sTemp = sharpenImage.PixelBuffer.AsStream();

sTemp.Seek(0,SeekOrigin.Begin);

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

return
sharpenImage;

}

else

{

returnnull;

}

}

 [图像效果]