vb.net - How is a negative image figured out? -

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My program works on im grayscale, Alpha creates a mask, and divides the color channel Image by pixel After looking at the pixel

I am using speed for vb2005.net using the things that are using drawing.graphics ?

You must use ColorMatrix : 

  new float [] [] {new float [] {-1, 0, 0, 0}, new Float [] {0, -1, 0, 0}, new float [0], 0, -1, 0}, new float [] {0, 1, 0}, new float [ ] {1, 1, 1, 0, 1}}

or (It is not certain that this can be done specifically in VB.NET)


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