On Tue, Mar 11, 2003 at 11:41:30AM -0800, Daniel Rogers wrote:
> Weight the pixel value by the alpha value, just like you do with any 
> other operation on pixels.  This makes sense when alpha is defined to be 
> the coverage.  If a pixel is only really half covered, their should half 
> the impulse response on the convolution kernel.

And so, if you're blurring with some transparent area, it's equivalent to
blurring with black? Doesn't make sense to me -- or am I missing something?

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