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revision 1.196 by tjl, Sun Dec 1 20:58:11 2002 UTC revision 1.197 by tjl, Sun Dec 1 21:00:44 2002 UTC
# Line 633  in the palette. Line 633  in the palette.
633  %     absolutely uniform  %     absolutely uniform
634    
635  For readability, we only use colors with the CIE $L^*$  For readability, we only use colors with the CIE $L^*$
636  lightness value over 80 (percent of maximum).  value over 80.
637  Note that for correct computation of the lightness,  Note that for correct computation of the lightness,
638  it is essential that the display gamma is properly adjusted  it is essential that the display gamma is properly adjusted
639  for linear RGB reproduction.  for linear RGB reproduction.
# Line 642  For each background, Line 642  For each background,
642  we use colors from {\em both} the dark and light end of the  we use colors from {\em both} the dark and light end of the
643  80-100 range in order to create some contrast.  80-100 range in order to create some contrast.
644  This makes the shapes in the texture apparent,  This makes the shapes in the texture apparent,
645  and avoids the unpleasant, blurry appearance of backgrounds with only  and avoids the unpleasant, blurry appearance of images with only
646  chroma changes in colors.  chroma changes in colors.
647    
648  %Even though the register combiners interpolate linearly between  %Even though the register combiners interpolate linearly between

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