PS262 Lecture Notes - Lecture 9: Subtractive Color, Color Vision, Spectral Sensitivity
Document Summary
Color perception greatly facilitates the ability to tell one object from another and especially to pick out objects within scenes, an ability crucial to the survival of many species. The link between good color vision and the ability to detect colored food has led to the proposal that monkey and human color vision may have evolved for the express purpose of detecting fruit. Color researchers consider red, yellow, green, and blue to be pure or unique colors because they ultimately make up all the other colors using different combinations of the four colors. The colors of objects are largely determined by the wavelengths of light that are re ected from the objects into our eyes. Chromatic colors or hues, such as blue, green and red occur when some wavelengths are re ected more than others, a process called selective re ection. Achromatic colors, such as white, grey or black, occur when light is re ected equally across the spectrum.
