Rhet Turnbull wrote:
> 
> I don't
> know the proper name for data that has been converted in such a way
> (discretized? quantized?) hence request for naming help.

I don't know a math term for this, but Photoshop has a function like
this called "Posterize". You can read the definition here:

http://www.alankorn.com/briefs/mendler.html#_ftn2

Maybe that's a little different than what you want. :)  

  -mark

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   Mark Stosberg              Principal Developer  
   [EMAIL PROTECTED]       Summersault, LLC     
   765-939-9301 ext 223       website development  
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