public void Transform(Bitmap bmp)
{
Bitmap renderedImage = bmp;
uint pixels = (uint)renderedImage.Height * (uint)renderedImage.Width;
decimal Const = 255 / (decimal)pixels;
int x, y, R, G, B;
ImageStatistics statistics = new ImageStatistics(renderedImage);
//Create histogram arrays for R,G,B channels
var histograms = statistics.GetHistograms();
int[] cdfR = histograms.Item1;
int[] cdfG = histograms.Item2;
int[] cdfB = histograms.Item3;
//Convert arrays to cumulative distribution frequency data
for (int r = 1; r <= 255; r++)
{
cdfR[r] = cdfR[r] + cdfR[r - 1];
cdfG[r] = cdfG[r] + cdfG[r - 1];
cdfB[r] = cdfB[r] + cdfB[r - 1];
}
for (y = 0; y < renderedImage.Height; y++)
{
for (x = 0; x < renderedImage.Width; x++)
{
Color pixelColor = renderedImage.GetPixel(x, y);
R = (int)((decimal)cdfR[pixelColor.R] * Const);
G = (int)((decimal)cdfG[pixelColor.G] * Const);
B = (int)((decimal)cdfB[pixelColor.B] * Const);
Color newColor = Color.FromArgb(R, G, B);
renderedImage.SetPixel(x, y, newColor);
}
}
}
