On Wed, 03 May 2000 06:56:52 -0400, Glen Berry wrote:
>On Tue, 02 May 2000 20:48:21 -0500, Chris Huff
><chr### [at] yahoocom> wrote:
>
>>Stuff I don't even know the use for, let alone how to implement. Could 
>>anyone tell me what these are for?
>
>>posterize
>
>As Ron Parker described, classic posterization is simply reducing the
>color depth to a relatively small number, without using any dithering
>to hide the banding. I don't believe that one has to perform this in
>two passes, however. Simply divide the range between minimum allowable
>value (0), and maximum allowable value for a color into a few discrete
>ranges.

Most of the posterization filters I've seen seem to try to optimize the 
colors that are actually used for the image in which they're used. 
This differs significantly from just chopping off the low-order bits.

-- 
Ron Parker   http://www2.fwi.com/~parkerr/traces.html
These are my opinions.  I do NOT speak for the POV-Team.

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