PCC 350 Exam 1

Question 1

3 factors required to observe object color

Answer 1

Light, object, observer

Question 2

additive color mixing

Answer 2

Red, green, blue; mixing primaries = white (reflects all color)

Question 3

subtractive color mixing

Answer 3

cyan, yellow, magenta; mixing primaries = black (absorbs all color)

Question 4

additive example

Answer 4

tv, monitors

Question 5

subtractive example

Answer 5

dye, paints

Question 6

anomalous trichromatism

Answer 6

using 3 primary colored lights to match colors, but needs more help to figure it out

Question 7

protanomals

Answer 7

needs more red to match R & G

Question 8

deuteranomals

Answer 8

needs more green to match B&Y

Question 9

tritanomals

Answer 9

needs more blue to match B&G

Question 10

dichromatism

Answer 10

Only need 2 primaries to match colors, one blue primary and another at any wavelength longer than green

Question 11

Protanopia

Answer 11

lack of functioning red cones

Question 12

Deuteranopia

Answer 12

lack of functioning green cones

Question 13

Tritanopia

Answer 13

lack of functioning blue cones

Question 14

Monochromatism

Answer 14

unable to perceive one color; match colors by adjusting brightness; can only see black and White

Question 15

Rod monochromatism

Answer 15

Behave as though they have no cone vision; average illumination levels appear too bright must wear dark spectacles

Question 16

Cone monochromatism

Answer 16

Behave as though they have normal cone vision but can’t perceive color

Question 17

Photopic vision

Answer 17

Color vision in daylight

Question 18

Scotopic vision

Answer 18

night (dominates in dim light)

Question 19

mesopic

Answer 19

twilight (before sunrise and after sunset)

Question 20

V-function

Answer 20

shows us how our eyes perceive brightness by correlating radiant energy

Question 21

2 degree field of view

Answer 21

mostly cones used (foveola)

Question 22

10 degree field of view

Answer 22

Typical fields of view in

Question 23

trichromacy

Answer 23

ability to match any color by mixing 3 primary light sources

Question 24

Trichromacy theory failures

Answer 24

Doesn’t explain after images or mixing of lights to produce colors like yellow

Question 25

Opponent color theory

Answer 25

pairs: RG, YB, Light-Dark (color is due to the combined response from these three different components)

Question 26

retinex theory

Answer 26

Based on lightness comparisons in a visual scene; 3 independent channels for comparing lightness; explains color constancy

Question 27

Beer-Lambert Law

Answer 27

Absorption of light is proportional to the number of absorbing molecules for a given path length

Question 28

Hue

Answer 28

distinct color

Question 29

Unique hue

Answer 29

pure for a given observer, not tinted by adjacent hues, can be used to define axes in a perceptual model with 3/d being lightness scale

Question 30

Monochromatic graph

Answer 30

All photons have same energy level

Question 31

Polychromatic graph

Answer 31

Photons in a beam of light have a variety of wavelengths

Question 32

What are the differant modes of viewing color

Answer 32

Self luminous Aperture object Volume

Question 33

Color Science can be applied in industry for:

Answer 33

Color specifiaction Standarization Process Control Computer colorant fomulation Color Measurement

Question 34

Green is cultural sig.

Answer 34

Fertility in Europe Infidelity in China Envy in the West

Question 35

perception of color

Answer 35

Understand how eye responds to light entails how one experiences color

Question 36

what variables at point of sale play a role in color perception

Answer 36

display modes types of illumination in the store use of catalogs for display

Question 37

psychology of color perception

Answer 37

provides information on how color is percieved based on mood and enviroment

Question 38

Achromatic colors

Answer 38

black, grey, white

Question 39

related colors

Answer 39

context of scene

Question 40

unrelated colo

Answer 40

isolation

Question 41

Chemical responsible for transmission of images to brain

Answer 41

11-cis-retinal

Question 42

11-cis-retinal derivative

Answer 42

Vitamin A1

Question 43

Cone require _______ levels of illumination, provide photopic vision

Answer 43

high

Question 44

compeonents of the eye help focus light

Answer 44

Lens (1/3) and cornea (2/3)

Question 45

how does lens morphologically change when focusing on distant object

Answer 45

becomes flatter

Question 46

differance between sensation and perception

Answer 46

sensation: detection of light perception: result from sensation

Question 47

afterimage

Answer 47

A visual image that persists after a stimulus is removed.