public void ProcessImage(PictureHandler sourceImage, PictureHandler targetImage)
{
float pixelCount = sourceImage.PixelHeight * sourceImage.PixelWidth;
float[] cdfR = new float[256];
float[] cdfG = new float[256];
float[] cdfB = new float[256];
float r, g, b;
sourceImage.GetHistogramDataFor(0, out r, out g, out b);
cdfR[0] = r;
cdfG[0] = g;
cdfB[0] = b;
for (int i = 1; i < 256; i++)
{
sourceImage.GetHistogramDataFor(i, out r, out g, out b);
cdfR[i] = cdfR[i - 1] + r;
cdfG[i] = cdfG[i - 1] + g;
cdfB[i] = cdfB[i - 1] + b;
}
float denominatorR = pixelCount - cdfR[0];
float denominatorG = pixelCount - cdfG[0];
float denominatorB = pixelCount - cdfB[0];
for (int x = 0; x < sourceImage.PixelWidth; x++)
{
for (int y = 0; y < sourceImage.PixelHeight; y++)
{
Color c = sourceImage[x, y];
int rr = (int)((cdfR[c.R] - cdfR[0]) / denominatorR * 255);
int gg = (int)((cdfG[c.G] - cdfR[0]) / denominatorG * 255);
int bb = (int)((cdfB[c.B] - cdfR[0]) / denominatorB * 255);
targetImage[x, y] = Color.FromRgb((byte)MathHelper.Limit(rr), (byte)MathHelper.Limit(gg), (byte)MathHelper.Limit(bb));
}
}
}
