CIS 3365 Lecture Notes - Lecture 13: Color Theory, Cie 1931 Color Space, Color Blindness

• School: University of Houston
• Department: Computer Information Systems
• Course: CIS 3365
• Professor: Xuqing Wu

Document Summary

Lecture 13: retina in grey and color cont. Color channels have less spatial resolution than luminance channel. Perception of shape or motion is due to mainly luminance channel. Color channels are better (only?) for labeling. There are six elementary colors and these colors are arranged perceptually as opponent pairs along three axis: black- white, red-green, yellow-blue. (hering 1920) Input of cones is processed in three distinct channels: luminance (red +green=yellow), red-green, yellow-blue. There are no colors named reddish green or yellowish blue (hurvich 1981) People tend to divide colors to a few. Subjects were asked to name 210 colors. Outlines corresponds to colors that were given same name with over 75% probability. The closer color is to pure color the to colors that were given same. Choosing color for labels (nominal information coding: distinctness, unique hues, contrast with background, color blindness, number, field size, convention. Recommendation (first six before the remaining six)