color part 1

Question 1

why do we perceieve color

Answer 1

1. signalling information- important information beyond shape/form/texture
2. perceptual organization- helps us see objects that dont differ in contrast/shape/texture
3. object recognition- helps us recognize what things are
4. cultural transmission- represent different emotions/concepts
5. aesthetics

Question 2

what colors can we perceive

Answer 2

visible light: 400-700nm

Question 3

monochromatic ilght

Answer 3

pure wavelength- laser light

Question 4

reflectance curves

Answer 4

amount of light reflected by objects (ex. vegetables)

lettuce reflects light mostly in the green area of spectrum

Question 5

paint color mixing

Answer 5

reflects only the wavelengths that the original ones share in common
- subtractive color mixing

Question 6

light color mixing

Answer 6

reflects all the wavelengths in the originals

- additive color mixing

Question 7

3D color space

Answer 7

hue saturation and value

Question 8

hue

Answer 8

chromatic or rainbow color

ex. green

Question 9

saturation

Answer 9

the amount of white added

Question 10

value

Answer 10

how light or dark the color is

Question 11

inverted spectrum

Answer 11

how do i konw my red is your red?

Question 12

trichromatic theory

Answer 12

3 principal colors, 3 receptor types and 3D construct

Question 13

color matching experiment

Answer 13

participant has to match color by adjusting brightness of 3 lights
- found that with 3 lights of wavelenghts you can match all field colors

Question 14

metamers

Answer 14

two different stimuli that are perceptually identical
ex. 580nm vs 530+620
cone response may be identical even if wavelengths are not