PSYB51H3 Lecture Notes - Monochromacy, Rhodopsin, Optical Flow
Document Summary
Lecture 5- the perception of color and motion. We see a lot of colours millions of them. Basic principles of colour perception: trichromacy, opponent processes, does everyone see colours the same way? (some see green as blue and vice versa, from the colour of lights to a world of colour. Colour: not a physical property but rather a psychophysical property. Most of the light we see is reflected. Typical light sources: sun, light bulb; emit a broad spectrum of wavelengths. Greenfilter: nose and stars appear~ equally bright but actually are very different in colour. Problem of univariance: an infinite set of different wavelength-intensity combinations can elicit exactly the same response from a single type of photoreceptor. One type of photoreceptor cannot make colour discriminations based on wavelength. Only the response of a receptor will tell us something about what light we are looking at. However, : the out put of one cone is completely ambiguous, there aren t red/green/blue cones!
