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PCC 350 > PCC 350 Exam 1 > Flashcards

PCC 350 Exam 1 Flashcards

1
Q

3 factors required to observe object color

A

Light, object, observer

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2
Q

additive color mixing

A

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

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3
Q

subtractive color mixing

A

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

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4
Q

additive example

A

tv, monitors

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5
Q

subtractive example

A

dye, paints

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6
Q

anomalous trichromatism

A

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

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7
Q

protanomals

A

needs more red to match R & G

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8
Q

deuteranomals

A

needs more green to match B&Y

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9
Q

tritanomals

A

needs more blue to match B&G

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10
Q

dichromatism

A

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

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11
Q

Protanopia

A

lack of functioning red cones

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12
Q

Deuteranopia

A

lack of functioning green cones

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13
Q

Tritanopia

A

lack of functioning blue cones

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14
Q

Monochromatism

A

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

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15
Q

Rod monochromatism

A

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

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16
Q

Cone monochromatism

A

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

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17
Q

Photopic vision

A

Color vision in daylight

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18
Q

Scotopic vision

A

night (dominates in dim light)

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19
Q

mesopic

A

twilight (before sunrise and after sunset)

20
Q

V-function

A

shows us how our eyes perceive brightness by correlating radiant energy

21
Q

2 degree field of view

A

mostly cones used (foveola)

22
Q

10 degree field of view

A

Typical fields of view in

23
Q

trichromacy

A

ability to match any color by mixing 3 primary light sources

24
Q

Trichromacy theory failures

A

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

25
Q

Opponent color theory

A

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

26
Q

retinex theory

A

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

27
Q

Beer-Lambert Law

A

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

28
Q

Hue

A

distinct color

29
Q

Unique hue

A

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

30
Q

Monochromatic graph

A

All photons have same energy level

31
Q

Polychromatic graph

A

Photons in a beam of light have a variety of wavelengths

32
Q

What are the differant modes of viewing color

A

Self luminous
Aperture
object
Volume

33
Q

Color Science can be applied in industry for:

A

Color specifiaction
Standarization
Process Control
Computer colorant fomulation
Color Measurement

34
Q

Green is cultural sig.

A

Fertility in Europe
Infidelity in China
Envy in the West

35
Q

perception of color

A

Understand how eye responds to light

entails how one experiences color

36
Q

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

A

display modes

types of illumination in the store

use of catalogs for display

37
Q

psychology of color perception

A

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

38
Q

Achromatic colors

A

black, grey, white

39
Q

related colors

A

context of scene

40
Q

unrelated colo

A

isolation

41
Q

Chemical responsible for transmission of images to brain

A

11-cis-retinal

42
Q

11-cis-retinal derivative

A

Vitamin A1

43
Q

Cone require _______ levels of illumination, provide photopic vision

A

high

44
Q

compeonents of the eye help focus light

A

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

45
Q

how does lens morphologically change when focusing on distant object

A

becomes flatter

46
Q

differance between sensation and perception

A

sensation: detection of light
perception: result from sensation

47
Q

afterimage

A

A visual image that persists after a stimulus is removed.

PCC 350 (2 decks)

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