public void highBoost(int maskSize, double sigma, double k)
{
// k==1 Unsharp
// k>1 highboost
Bitmap original = new Bitmap(Img);
gaussianFilter(maskSize, sigma);
Bitmap MaskImage = ImageArithmetic.Subtract(original, Img);
Bitmap newImg = new Bitmap(Img.Width, Img.Height);
for (int col = 0; col < Img.Width; col++)
{
for (int row = 0; row < Img.Height; row++)
{
Color curCol = Img.GetPixel(col, row);
Color maskCol = MaskImage.GetPixel(col, row);
int newR = (int)(curCol.R + k * maskCol.R);
int newG = (int)(curCol.G + k * maskCol.G);
int newB = (int)(curCol.B + k * maskCol.B);
newR = Math.Min(newR, 255);
newR = Math.Max(newR, 0);
newG = Math.Min(newG, 255);
newG = Math.Max(newG, 0);
newB = Math.Min(newB, 255);
newB = Math.Max(newB, 0);
newImg.SetPixel(col, row, Color.FromArgb(newR, newG, newB));
}
}
this.Img = newImg;
}