private void FilterChromacity(YCrCbImage yCrCbImage)
{
for (int i = 0; i < yCrCbImage.Width; i++)
{
for (int j = 0; j < yCrCbImage.Height; j++)
{
var crs = new List <int>();
var cbs = new List <int>();
for (int x = i - WINDOW; x <= i + WINDOW; x++)
{
for (int y = j - WINDOW; y <= j + WINDOW; y++)
{
if (x >= 0 && x < yCrCbImage.Width && y >= 0 && y < yCrCbImage.Height)
{
crs.Add(yCrCbImage.Cr[x, y]);
cbs.Add(yCrCbImage.Cb[x, y]);
}
}
}
yCrCbImage.Cr[i, j] = Median(crs);
yCrCbImage.Cb[i, j] = Median(cbs);
}
}
}
private void ConvertToBitmap(YCrCbImage yCrCbImage, Bitmap result)
{
for (int i = 0; i < result.Width; i++)
{
for (int j = 0; j < result.Height; j++)
{
var newR = (int)(yCrCbImage.Y[i, j] + 1.402f * (yCrCbImage.Cr[i, j] - 128.0f));
var newG = (int)(yCrCbImage.Y[i, j] - 0.34414f * (yCrCbImage.Cb[i, j] - 128.0f) - 0.71414f * (yCrCbImage.Cr[i, j] - 128.0f));
var newB = (int)(yCrCbImage.Y[i, j] + 1.772f * (yCrCbImage.Cb[i, j] - 128.0f));
newR = Math.Max(0, newR);
newG = Math.Max(0, newG);
newB = Math.Max(0, newB);
newR = Math.Min(255, newR);
newG = Math.Min(255, newG);
newB = Math.Min(255, newB);
var newPixel = Color.FromArgb(newR, newG, newB);
result.SetPixel(i, j, newPixel);
}
}
}
private YCrCbImage ConvertToYCrCbImage(Bitmap image)
{
var result = new YCrCbImage();
result.Width = image.Width;
result.Height = image.Height;
result.Y = new int[image.Width, image.Height];
result.Cr = new int[image.Width, image.Height];
result.Cb = new int[image.Width, image.Height];
for (int i = 0; i < image.Width; i++)
{
for (int j = 0; j < image.Height; j++)
{
var pixel = image.GetPixel(i, j);
result.Y[i, j] = (int)(0.299f * pixel.R + 0.587f * pixel.G + 0.114f * pixel.B);
result.Cr[i, j] = (int)(128.0f + 0.5f * pixel.R - 0.418688f * pixel.G - 0.081312f * pixel.B);
result.Cb[i, j] = (int)(128.0f - 0.168736 * pixel.R - 0.331264f * pixel.G + 0.5f * pixel.B);
}
}
return(result);
}
