What Are The Basic Color Vision Tasks?
It is important to distinguish among the different color tasks that a viewer might perform. I say this because the different tasks follow different rules and involve different parts of the visual system, e. g., photoreceptors, opponent processes and memory. Much like the case with aperture vs. surface color, experts often indvertantly confuse nonexperts by shifting gears from one context to another without making it clear that they are talking about a related, but different, phenomenon. • Color discrimination: The determination of whether two colors are the same or different. • Color appearance: The perception of colors. This is strictly internal to a viewer and cannot be directly measured. Color discrimination and appearance are only very loosely related tasks. • Color naming: The task of putting a verbal label on to the perceived color. There are many possible colors but only a few common color terms. In other words, many color will have the same name. But how do people chose which n
