图像基础---RGB分量增强效果
RGB分量调整实际上是分别对每个像素的RGB三个分量进行调整，公式如下：
[函数代码]
///
/// R,G,B value adjusting.
///
/// The source image.
/// To judge which one to adjust, R is 3, G is 2, B is 1.
/// It is a value to adjust the result image.
///
public static WriteableBitmap RGBAdjustProcess(WriteableBitmap src,int value,int threshould)////41 RGB分量调整
{
if (src != null)
{
int w = src.PixelWidth;
int h = src.PixelHeight;
WriteableBitmap srcImage = new WriteableBitmap(w, h);
byte[] temp = src.PixelBuffer.ToArray();
if (value == 1)
{
for (int i = 0; i < temp.Length; i += 4)
{
temp[i] = (byte)(Math.Max(0, Math.Min((temp[i] + threshould), 255)));
}
}
if (value == 2)
{
for (int i = 0; i < temp.Length; i += 4)
{
temp[i + 1] = (byte)(Math.Max(0, Math.Min((temp[i + 1] + threshould), 255)));
}
}
if (value == 3)
{
for (int i = 0; i < temp.Length; i += 4)
{
temp[i + 2] = (byte)(Math.Max(0, Math.Min((temp[i + 2] + threshould), 255)));
}
}
Stream sTemp = srcImage.PixelBuffer.AsStream();
sTemp.Seek(0, SeekOrigin.Begin);
sTemp.Write(temp, 0, w * 4 * h);
return srcImage;
}
else
{
return null;
}
}
[图像效果]
Fig.1原图
Fig.2B分量调整(threshould=255)
Fig.2G分量调整(threshould=255)
Fig.2R分量调整(threshould=255)
demo 下载： http://www.zealfilter.com/forum.php?mod=viewthread&tid=46&extra=page%3D1