RE: Re: associated alpha

On Fri, 11 Feb 2005, Bob Friesenhahn wrote:

> According to the TIFF specification, colormapped images can have 
> associated alpha.  This is actually quite feasable

Sorry for that, thanks for the correction. From working a lot in
Photoshop, with colorapped images that always have just a 1 bit
transparency mask, I never considered the possibility for Tiffs.

I've been doing more video compositing work lately with colormapped
images, so I'm interested in this. Is the problem just that saving
colormapped associated-alpha tiffs will be lossy... or that you are
trying to implement the specs without changing how the API works for
existing users or files?

David



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