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[Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex
From: |
Janne V. Kujala |
Subject: |
[Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex |
Date: |
Sun, 01 Dec 2002 15:35:45 -0500 |
CVSROOT: /cvsroot/gzz
Module name: gzz
Changes by: Janne V. Kujala <address@hidden> 02/12/01 15:35:45
Modified files:
Documentation/Manuscripts/Paper: paper.tex
Log message:
Edit
CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/gzz/Documentation/Manuscripts/Paper/paper.tex.diff?tr1=1.190&tr2=1.191&r1=text&r2=text
Patches:
Index: gzz/Documentation/Manuscripts/Paper/paper.tex
diff -u gzz/Documentation/Manuscripts/Paper/paper.tex:1.190
gzz/Documentation/Manuscripts/Paper/paper.tex:1.191
--- gzz/Documentation/Manuscripts/Paper/paper.tex:1.190 Sun Dec 1 15:21:03 2002
+++ gzz/Documentation/Manuscripts/Paper/paper.tex Sun Dec 1 15:35:45 2002
@@ -569,7 +569,20 @@
The final image contains convex combinations of
the palette colors.
+Usually color perception is divided to lightness, hue,
+and saturation (the chromatic purity), which are nonlinearly
+related to the usual RGB values.
+There is one problem in using the hue angles
+of the CIE $L^*a^*b^*$ \cite{cie86colorimetry} color space ---
+it produces too much blue and too little yellow in
+the range of light colors.
+Therefore, we actually map the angles to hues
+using a color circle with
+evenly spaced ``primary'' hues.
+To balance the blue bias, we use seven primaries
+with orange added between the usual hues
+of the six saturated corners of the RGB cube.
%In addition to choosing perceptually diverse colors,
%there is the the question of how many colors to use.
@@ -587,14 +600,11 @@
%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
-related to the usual RGB values.
-A color space is called perceptually uniform, if the Euclidian
-distance of coordinates approximately corresponds to the
-perceived difference of color.
-For example, the CIE $L^*a^*b^*$ \cite{cie86colorimetry}
-color space is reasonably perceptually uniform.
+%A color space is called perceptually uniform, if the Euclidian
+%distance of coordinates approximately corresponds to the
+%perceived difference of color.
+%For example, the CIE $L^*a^*b^*$ \cite{cie86colorimetry}
+%color space is reasonably perceptually uniform.
To produce chromatically compatible colors, we choose
the hue angles for the base colors of a single background
@@ -609,17 +619,6 @@
of the palette, the interpolated colors would easily span too
much area on the color circle.
The saturations are chosen by an ad hoc distribution.
-
-There is one problem in using the hue angles
-of the CIE $L^*a^*b^*$ color space ---
-it produces too much blue and too little yellow in
-the range of light colors.
-Therefore, we actually map the angles to hues
-using a color circle with
-evenly spaced ``primary'' hues.
-To balance the blue bias, we use seven primaries
-with orange added between the usual hues
-of the six saturated corners of the RGB cube.
% Uniform?
% 1) define term
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, (continued)
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex,
Janne V. Kujala <=
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01
- [Gzz-commits] gzz/Documentation/Manuscripts/Paper paper.tex, Tuomas J. Lukka, 2002/12/01