Some questions

Boudewijn Rempt boud at
Thu Mar 16 14:44:58 CET 2006

On Thursday 16 March 2006 14:45, Leonardo Giordani wrote:
> > factor is a value that each summed color component is divided by while
> > convolving; offset is added. So, we add all values for red, green and
> > blue in a set of pixels, then divice them by factor and add offset.
> > Factor should be near the sum of the kernel values in the convolution
> > kernel otherwise the result will be much darker or lighter.
> Ah ok, they are normalization values; why aren't they computed by the
> function instead of given by the caller of the function?

Because you can do fun things with them if you make them available from the 
user interface, I think. Take a look at the custom convolution filter where 
you can set them.

Boudewijn Rempt
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