Beispiel #1
0
        public static Bitmap ThresholdingWithGrayScaleLevel(Bitmap bmp, int p1, int p2)
        {
            var grayscale = BitmapHelper.ToGrayscale(bmp);

            for (int x = 0; x < grayscale.Width; x++)
            {
                for (int y = 0; y < grayscale.Height; y++)
                {
                    if (grayscale.GetPixel(x, y).R <= p1 || grayscale.GetPixel(x, y).R >= p2)
                    {
                        grayscale.SetPixel(x, y, Color.FromArgb(0, 0, 0, 0));
                    }
                }
            }
            return(grayscale);
        }
Beispiel #2
0
        public static Bitmap Rozciaganie(Bitmap b, int p1, int p2)
        {
            var bmp = BitmapHelper.ToGrayscale(b);

            for (int x = 0; x < bmp.Width; x++)
            {
                for (int y = 0; y < bmp.Height; y++)
                //if (p1 < p2)
                {
                    if (bmp.GetPixel(x, y).R > p1 && bmp.GetPixel(x, y).R <= p2)
                    {
                        var av = ((bmp.GetPixel(x, y).R - p1) * ((256 - 1) / (p2 - p1)));
                        bmp.SetPixel(x, y, Color.FromArgb(bmp.GetPixel(x, y).A, av, av, av));
                    }
                }
            }
            //else bmp[x, y] = 0;
            return(bmp);
        }
Beispiel #3
0
        public static Bitmap Thresholding(Bitmap bmp, int value)
        {
            var grayscale = BitmapHelper.ToGrayscale(bmp);

            for (int x = 0; x < grayscale.Width; x++)
            {
                for (int y = 0; y < grayscale.Height; y++)
                {
                    if (grayscale.GetPixel(x, y).R <= value)
                    {
                        grayscale.SetPixel(x, y, Color.FromArgb(0, 0, 0, 0));
                    }
                    else
                    {
                        grayscale.SetPixel(x, y, Color.FromArgb(255, 255, 255, 255));
                    }
                }
            }
            return(grayscale);
        }