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From: davis@pacific.mps.ohio-state.edu ("John E. Davis")
Newsgroups: comp.lang.postscript
Subject: grayscale -- logarithmic or linear??
Message-ID: <DAVIS.91May13235246@pacific.mps.ohio-state.edu>
Date: 14 May 91 03:52:46 GMT
Sender: news@pacific.mps.ohio-state.edu
Reply-To: davis@pacific.mps.ohio-state.edu  (John E. Davis)
Distribution: comp
Organization: "Dept. of Physics, The Ohio State University"
Lines: 15

Hi,

   I was wondering if the relationship between the grayscale as defined by
postscript (density of points??) and the way the eye perceives shades of gray
is linear or logarithmic.  It seems to me that the eye less sensitive to the
darker shades of gray than lighter ones.  The reason I want to know is that I
am writing a program to draw contour plots and I am representing the third
dimension as shades of gray.

Thanks,
--
John

  bitnet: davis@ohstpy
internet: davis@pacific.mps.ohio-state.edu