POV-Ray : Newsgroups : povray.general : stripes in my color map : Re: stripes in my color map Server Time
30 Jul 2024 00:20:25 EDT (-0400)
  Re: stripes in my color map  
From: Darren New
Date: 3 Dec 2010 11:45:18
Message: <4cf91e9e$1@news.povray.org>
Joost wrote:
>> My favorite way of getting rid of these artifacts is to render to
>> OpenEXR, and then use IC to convert to the target 8-bit image format. As
>> IC uses dithering for such conversions, instead of the banding you'll
>> get 1-bit noise, which the human eye does not notice anymore.
> 
> Ah, you could be speaking chinese to me with the same effect ;-) If you could
> spare some time to translate that to layman terms, I would very much appriciate
> it.

OpenEXR stores more than 8 bits for each pixel. Dithering (WIYF, btw) moves 
pixels small distances in pseudo-random directions in order to blur the 
edges of the bands, essentially.  http://en.wikipedia.org/wiki/Dither

-- 
Darren New, San Diego CA, USA (PST)
   Serving Suggestion:
     "Don't serve this any more. It's awful."


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