Question

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convert image to Black-White or Sepia in c#

I’m writing a C# application, that opens an image, and clicking on a button, displays it in only black and white!
I was sure to find a lot of information on the net, but my searches didn’t give me a lot of understandable and useful information.

I have no idea of how to proceed. Does any one have any advice ? Know a tutorial on the net?

Answer 1

I once found a function that converts a bitmap to grayscale

public void ToGrayScale(Bitmap Bmp)
{
    int rgb;
    Color c;

    for (int y = 0; y < Bmp.Height; y++)
    for (int x = 0; x < Bmp.Width; x++)
    {
        c = Bmp.GetPixel(x, y);
        rgb = (int)Math.Round(.299 * c.R + .587 * c.G + .114 * c.B);
        Bmp.SetPixel(x, y, Color.FromArgb(rgb, rgb, rgb));
    }
}

The function accepts a bitmap as a parameter, and changes it to its grayscale version.

I hope this helps.