A study of just noticeable luminance difference for various colors
| Autor: | CHEN Rui-Qi, 陳睿騏 |
|---|---|
| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 The just noticeable luminance difference is the luminance difference that can be just visually discriminated for two colors at the same CIE xy color coordinates. The difference is one of the basic characteristics of human vision. The ratio of the just noticeable luminance difference and the luminance of the color is called the Weber fraction by convention. The Weber fraction is usually assumed to be independent of color coordinates, i.e., the Weber fractions of different color coordinates are the same. This thesis measures the Weber fractions of different color coordinates with a psychophysical experiment. A liquid crystal display is used to display the color patches in the experiment. The gray, red and green colors at the coordinates (0.305, 0.323), (0.475, 0.3）and（0.258, 0.45）are chosen as the color centers in the experiment. The luminance of the three color centers are the same as 48 cd/m2. Experimental results show that the Weber fractions of gray, red and green are 1.612%, 1.99% and 1.809%. The Weber fraction increases with color saturation. The dependence of Weber fraction on color coordinates should be due to the Helmholtz-Kohlrausch effect. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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