Win8Metro(C#)数字图像处理--2.9图像均值滤波


[函数名称]
图像均值滤波函数MeanFilterProcess(WriteableBitmap
src)



[函数代码]
///<summary>
///
Mean filter process.
///</summary>
///<param
name="src">Source image</param>
///<returns></returns>
publicstaticWriteableBitmap
MeanFilterProcess(WriteableBitmap src)////9均值滤波处理
{
if(src!=null
)
{
int
w = src.PixelWidth;
int
h = src.PixelHeight;
WriteableBitmap
filterImage =newWriteableBitmap(w,h);
byte[]
temp = src.PixelBuffer.ToArray();
byte[]
tempMask = (byte[])temp.Clone();
for
(int j = 1; j < h - 1; j++)
{
for
(int i = 4; i < w * 4 - 4; i += 4)
{
temp[i + j * w * 4] = (byte)((tempMask[i
- 4 + (j - 1) * w * 4] + tempMask[i + (j - 1) * w * 4] + tempMask[i + 4 + (j - 1) * w * 4]
+ tempMask[i - 4 + j * w * 4] + tempMask[i + 4 + j * w * 4] + tempMask[i
- 4 + (j + 1) * w * 4] + tempMask[i + (j + 1) * w * 4]
+ tempMask[i + 4 + (j + 1) * w * 4]) / 8);
temp[i + 1 + j * w * 4] = (byte)((tempMask[i
- 4 + 1 + (j - 1) * w * 4] + tempMask[i + 1 + (j - 1) * w * 4] + tempMask[i + 1 + 4 + (j - 1) * w * 4]
+ tempMask[i + 1 - 4 + j * w * 4] + tempMask[i + 1 + 4 + j * w *
4] + tempMask[i + 1 - 4 + (j + 1) * w * 4] + tempMask[i + 1 + (j + 1) * w * 4]
+ tempMask[i + 1 + 4 + (j + 1) * w * 4]) / 8);
temp[i + 2 + j * w * 4] = (byte)((tempMask[i
+ 2 - 4 + (j - 1) * w * 4] + tempMask[i + 2 + (j - 1) * w * 4] + tempMask[i + 2 + 4 + (j - 1) * w * 4]
+ tempMask[i + 2 - 4 + j * w * 4] + tempMask[i + 2 + 4 + j * w *
4] + tempMask[i + 2 - 4 + (j + 1) * w * 4] + tempMask[i + 2 + (j + 1) * w * 4]
+ tempMask[i + 2 + 4 + (j + 1) * w * 4]) / 8);
}
}
Stream
sTemp = filterImage.PixelBuffer.AsStream();
sTemp.Seek(0,
SeekOrigin.Begin);
sTemp.Write(temp, 0, w * 4 * h);
return
filterImage;
}
else
{
returnnull;
}

}
[图像效果]