[函數名稱]
圖像霓虹效果函數NeonProcess(WriteableBitmap src)
上述公式進行開方即可。
[函數代碼]
///<summary>
/// Neon process.
///</summary>
///<param name="src">Source image.</param>
///<returns></returns>
publicstaticWriteableBitmap NeonProcess(WriteableBitmap src)////15霓虹處理
{
if(src!=null )
{
int w = src.PixelWidth;
int h = src.PixelHeight;
WriteableBitmap neonImage =newWriteableBitmap(w, h);
byte[] temp = src.PixelBuffer.ToArray();
byte[] tempMask = (byte[])temp.Clone();
int b = 0, g = 0, r = 0;
for (int j = 1; j < h - 1; j++)
for (int i = 4; i < w * 4 - 4; i += 4)
{
if (i == 0 || i == w - 4 || j == 0 || j == h - 1)
{
temp[i + j * w * 4] = (byte)0;
temp[i + 1 + j * w * 4] = (byte)0;
temp[i + 2 + j * w * 4] = (byte)0;
}
else
b = (int)Math.Sqrt((tempMask[i + j * w * 4] - tempMask[i + 4 + j * w * 4]) * (tempMask[i + j * w * 4] - tempMask[i + 4 + j * w * 4])
+ (tempMask[i + j * w * 4] - tempMask[i + (j + 1) * w * 4]) * (tempMask[i + j * w * 4] - tempMask[i + (j + 1) * w * 4]));
g = (int)Math.Sqrt((tempMask[i + 1 + j * w * 4] - tempMask[i + 4 + 1 + j * w * 4]) * (tempMask[i + 1 + j * w * 4] - tempMask[i + 4 + 1 + j * w * 4])
+ (tempMask[i + 1 + j * w * 4] - tempMask[i + 1 + (j + 1) * w * 4]) * (tempMask[i + 1 + j * w * 4] - tempMask[i + 1 + (j + 1) * w * 4]));
r = (int)Math.Sqrt((tempMask[i + 2 + j * w * 4] - tempMask[i + 4 + 2 + j * w * 4]) * (tempMask[i + 2 + j *w * 4] - tempMask[i + 4 + 2 + j * w * 4])
+ (tempMask[i + 2 + j * w * 4] - tempMask[i + 2 + (j + 1) * w * 4]) * (tempMask[i + 2 + j * 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;
}
}
Stream sTemp = neonImage.PixelBuffer.AsStream();
sTemp.Seek(0,SeekOrigin.Begin);
sTemp.Write(temp, 0, w * 4 * h);
return neonImage;
else
returnnull;
}
}
[圖像效果]
