1.2 Chromatic Light
How to describe color? - We have several possibilities:
1. Make a table of colors, e.g. Munsell color-order system.
Figure:
A commercial color table
![\includegraphics[]{I-33a}](img65.png) |
2. Assign names to colors, e.g. Light-Goldenrot-Yellow, Medium-Spring-Green, etc.
3. Produce colors by some process:
Artists speak about the following variations of pure pigments:
- TINTS (means adding white),
- SHADES (means adding black),
- and TONES (means adding a combination of both).
Figure:
The artists description of colors
![\begin{figure}\begin{picture}(4,4)
\put(0.3,3){\makebox(0,0){White}}
\put(0.3,2)...
...des}}
\put(1,1){\makebox(0,0){$\bullet$}\line(0,2){2}}
\end{picture}\end{figure}](img66.png) |
Consequently colored light has following quantities associated:
- HUE (corresponding to pure pigment)
- SATURATION (i.e. distance from gray of equal intensity)
- LIGHTNESS (i.e. perceived intensity of a reflecting object)
or BRIGHTNESS (i.e. perceived intensity of light emitting object).
Subsections
Andreas Kriegl 2003-07-23