573 |
and saturation (the chromatic purity), which are nonlinearly |
and saturation (the chromatic purity), which are nonlinearly |
574 |
related to the usual RGB values. |
related to the usual RGB values. |
575 |
|
|
576 |
There is one problem in using the hue angles |
Even though the CIE $L^*a^*b^*$ \cite{cie86colorimetry} color space |
577 |
of the CIE $L^*a^*b^*$ \cite{cie86colorimetry} color space --- |
is fairly perceptually uniform, it is not good for selecting |
578 |
it produces too much blue and too little yellow in |
single, random colors: |
579 |
|
using a uniformly chosen hue angle |
580 |
|
produces too much blue and too little yellow in |
581 |
the range of light colors. |
the range of light colors. |
582 |
Therefore, we actually map the angles to hues |
Because of this, we map use a different color circle |
583 |
using a color circle with |
with seven evenly spaced ``primary'' hues (RGB, CMY and orange). |
584 |
evenly spaced ``primary'' hues. |
% To balance the blue bias, we use seven primaries |
585 |
To balance the blue bias, we use seven primaries |
% with orange added between the usual hues |
586 |
with orange added between the usual hues |
% of the six saturated corners of the RGB cube. |
|
of the six saturated corners of the RGB cube. |
|
587 |
|
|
588 |
%In addition to choosing perceptually diverse colors, |
%In addition to choosing perceptually diverse colors, |
589 |
%there is the the question of how many colors to use. |
%there is the the question of how many colors to use. |
1016 |
|
|
1017 |
NONREP: BAD HW ACCEL? |
NONREP: BAD HW ACCEL? |
1018 |
|
|
1019 |
|
COLORS MOST DIFFICULT |
1020 |
|
|
1021 |
% \section{MPEG Animation} |
% \section{MPEG Animation} |
1022 |
% [not to be included in final ms.] |
% [not to be included in final ms.] |