POV-Ray : Newsgroups : povray.beta-test : [Doc] gray equation : [Doc] gray equation Server Time
29 Jul 2024 08:23:07 EDT (-0400)
  [Doc] gray equation  
From: Le Forgeron
Date: 11 Jun 2002 04:25:12
Message: <3D05B3FD.5000607@free.fr>
Version 3.5.beta.RC6.icl.win32
(was already signaled for RC5)

In 6.5.4.2 Functions in Isosurface,

the equation for the .gray is bogus, it is given as
   gray value = Red*58.9% + Green*11.4% + Blue*29.7%

which means that Red would be brighter than Blue which would be brigher than Green.
IMHO, for the human eyes, it should be
   gray value = Red*29.7% + Green*58.9% + Blue*11.4%
(Because Green is brighter than Red which is brighter than Blue)

Or at least something in the line like : 60% Green, 30% Red, 10%Blue
and not 60% Red, 30% Blue, 10% Green


-- 
Non Sine Numine
http://grimbert.cjb.net/
Puis, s'il advient d'un peu triompher, par hasard,






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