[Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex

[Janne V. Kujala]

CVSROOT:        /cvsroot/gzz
Module name:    gzz
Changes by:     Janne V. Kujala <address@hidden>        02/11/22 06:12:04

Modified files:
        Documentation/Manuscripts/Paper: paper.tex 

Log message:
        colors

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/gzz/Documentation/Manuscripts/Paper/paper.tex.diff?tr1=1.55&tr2=1.56&r1=text&r2=text

Patches:
Index: gzz/Documentation/Manuscripts/Paper/paper.tex
diff -u gzz/Documentation/Manuscripts/Paper/paper.tex:1.55 
gzz/Documentation/Manuscripts/Paper/paper.tex:1.56
--- gzz/Documentation/Manuscripts/Paper/paper.tex:1.55  Fri Nov 22 05:42:47 2002
+++ gzz/Documentation/Manuscripts/Paper/paper.tex       Fri Nov 22 06:12:04 2002
@@ -225,6 +225,7 @@
 The identity is used as a seed for randomly choosing
 an easily distinguishable unique texture from a
 distribution based on a qualitative model of visual perception.
+Additionally, black text should have good contrast with the background.
 %providing an infinite source of unique textures.
 %generating textures based on seed numbers [identity]
 The basic assumption of the model is that an image
@@ -330,27 +331,26 @@
 \subsection{Colors}
 
 Color is the most dominant visual attribute of a background. 
-Therefore, it is essential that the perception of the coloring 
-of the backgrounds is as uniform as possible. % XXX ***WHAT*** does this mean?
+Therefore, it is essential that the distribution of the colors 
+is as uniform as possible with respect to a model of color perception.
+% XXX ***WHAT*** does this mean?
 
 Using multiple different colors in a background allows 
 a multitude of different combinations 
 but too many different colors in one background are perceived just 
 as a mix of many colors, making all such backgrounds look the same.
-%XXX: 
-Connect with "random pixels" example
+As an extreme case, consider the example of random texels discussed earlier.
 
-Therefore, we use a small palette of carefully chosen colors for each 
background,
+To maintain color balance,
+we use a small palette of carefully chosen colors for each background,
 independent of the basis textures producing the shapes of the background. 
 Register combiners are used to combine the shape with the colors 
 as explained in the following sections.
 
-Black text should have good contrast with the background.
 %The most important constraint for the colors is readability:
 %% XXX This is our CHOICE for a goal, not an absolute one.
-Additionally, the colors should be perceptually uniformly distributed
-and ``balanced'' to avoid overloading of color perception.
-% "Overloading"? 
+%Additionally, the colors should be ``balanced'' and 
+%perceptually uniformly distributed 
 
 Usually color perception is divided to lightness, hue, 
 and saturation (the chromatic purity), which are nonlinearly
@@ -373,6 +373,7 @@
 it is essential that the display gamma is properly adjusted
 for linear RGB reproduction.
 % Onko lineaarinen *varmasti* oikea LAB-muunnokselle?
+
 Because the shapes should also be distinguishable, 
 we use one half dark colors and one half light colors in the 
 range to have some contrast for the shapes.
@@ -387,7 +388,7 @@
 %% Doesn't really need to be said here; it's what people
 %% will naturally assume.
 
-To have balanced colors, we choose the hues from a distribution
+To have compatible colors, we choose the hues from a distribution
 % To have: huonoa englantia
 concentrated on one random hue with a random variance and
 saturations chosen from an ad hoc distribution.
@@ -395,10 +396,11 @@
 allows motley palettes to occur occasionally.
 
 Because the $a^*b^*$ plane of the CIE $L^*a^*b^*$ color space seems to 
-have too large angle of blue for light colors, 
+have too much blue and too little yellow for light colors, 
 we actually choose the hues by 
 interpolating uniformly between seven primary colors,
-with orange added between the usual six colored corners of the RGB cube.
+with orange added between the hues of the usual six saturated corners
+of the RGB cube.
 % reasoning?
 
 Opposite color schemes could also be used for more variation,