PSYB51H3 Chapter 5: Chapter 5 - Textbook Notes
Document Summary
Metamers: actually see mix of wavelengths at same time. Individual wavelengths don"t change when mixed: exact amounts are needed. Intensity of light: nonspectral hues are colours only possible by combining wavelengths. History of t richromatic theory: basis was newton"s discopery that prism would break sunlight into spectrum of hues, knew colour was production of mind, maxwell found we could match colours with just 3 lights (rgb) diff chromatic info is put against each other: have enough cells to have opponent colour system. Psychophysical roots of opponent color theory: opponent colour theory: seeing colour is based on opposites, red-green, blue-yellow, black-white, hue cancellation (adding opp. Afterimages: another way to see opponent colours: afterimages, e. g. look red, then grey. Colour in the visual cortex: there is a mismatch between colour perception and lgn cells, e. g. Excited by yellow and inhibited by blue, but not true: means lgn is not end of colour processing.
