On Wed, 12 Jan 2000 22:46:35 -0500, Matt Giwer wrote:
>    Or just put a penny on a scanner.

That doesn't give you a depthmap, and it doesn't give you something you 
could integrate to get a depthmap (the light is coming from in front, so
there are no shadows.)

>    As to and inverse operation, I don't see what you mean. But there is
>always a separate inverse function, the photonegative.

I mean inverse in the mathematical sense, as in "the operation you'd perform
to undo the emboss operation."

>    And there is also almost always the "stamp" filter instead of emboss
>which often works much better for things where emboss appears to be the right
>thing but doesn't work. And with stamp you should get control of edge depth
>and direction.

But it does the same basic operation as emboss, which is differentiation.
I want a filter that integrates.

I could of course write one that works on PPM files, which would be good 
enough for my purposes.  Maybe when I have more free time... (like that'll
ever happen)

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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