POV-Ray : Newsgroups : povray.general : anti-aliasing : Re: anti-aliasing Server Time
19 Nov 2024 15:43:38 EST (-0500)
  Re: anti-aliasing  
From: Warp
Date: 13 Feb 2002 12:47:46
Message: <3c6aa6c2@news.povray.org>
Felix Wiemann <Fel### [at] gmxnet> wrote:
: when I use anti-aliasing and treshold 0.0 (+A0.0) with an empty (black)
: scene, every pixel is super-sampled. The doc says every pixel which differs
: *more* than threshold is sampled, but that's not true. Try +A0.001: No pixel
: is sampled anymore!

  I think that's just a colloquial terminology thing. It wants to say that
if(difference_between_adjacent_pixels >= threshold) then supersample.
  However, that '>=' is more difficult to express in fluent english than
just "more than".
  Of course it could be said precisely, but it would require a rewording of
the expression. Instead of being something like
  "If adjacent pixel colors differ more than the given threshold..."
it would need to be something like:
  "If the difference in color between adjacent pixels is more or equal to
the given threshold..."

: Why are the pixels at the edges sampled in a different way than the others
: with method 2 (but not method 1)?
: Why isn't the maximum number of samples taken?

  As Thorsten said, who cares as long as it gives a good result?-)

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -


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