Question

I have a black and white System.Drawing.Bitmap I need to auto-crop it so that it is only as big as needed to fit the image. This image always starts at the top left (0,0) position but I’m not sure how much height and width is will require. If there any way to auto-crop it to size?

Answer 1

The following is the code I used:

    // Figure out the final size
    int maxX = 0;
    int maxY = 0;
    for (int x = 0; x < bitmap.Width; x++)
    {
        for (int y = 0; y < bitmap.Height; y++)
        {
            System.Drawing.Color c = bitmap.GetPixel(x, y);
            System.Drawing.Color w = System.Drawing.Color.White;
            if (c.R != w.R || c.G != w.G || c.B != w.B)
            {
                if (x > maxX)
                    maxX = x;
                if (y > maxY)
                    maxY = y;
            }
        }
    }
    maxX += 2;