Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PPMV 2 > Color Vision 1 > Flashcards

Color Vision 1 Flashcards

1
Q

How human’s see is influenced by what 2 concepts?

A
  1. Brightness perception

2. Color Vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

This helps us differentiate objects allowing us to function without color.

A

Brightness perception

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

This allows us to discern different objects but doesn’t function as well without brightness perception

A

Color Vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What portion of the spectrum is visible to human eyes?

A

400-700nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the specific wavelengths 0ur photopigments can absorb at 400-700nm?

A
  • Spectral color or spectral light
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

For our vision system, what type of wavelengths look dimmer?

A

Short and long

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

For our visual syste, which wavelengths look the brightest?

A

Middle wavelengths

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Mixing of primary light sources is _____, while mixing of primary absorbing pigments is _____.

A
  • light = additive

- pigment = subtractive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Light at what wavelength stimulates all 3 types of cones?

A

475nm

- stimulates s cones > L cones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

This principle states the after a quantum of light is absorbed, all info about its wavelength is lost. Only the number of photons absorbed is encoded.

A

Principle of Univariance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Monochromats appear to differentiate colors because they use what 3 clues?

A
  1. brightness
  2. shape
  3. context
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

This type of disorder only requires 1 primary light to match any test light. Only need a change in brightness. Good VA.

A

Cone monochromat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

This type of disorder is missing all 3 cone types and only has rods. No color discrimination, poor VA and sensitive to light.

A

Rod monochromat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This disorder has 2 type of cone photoreceptor types present with 2 different photopigments. Requires 2 primary lights to complete color matching. Limited color vision, normal VA.

A

Dichromat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many wavelengths do monochromats need to make a match?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many wavelengths does a dichromat need to make a match divided into 2 patches?

A

3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

This is when one set of color stimuli all have the same color appearance, but different spectral comparison.

A

Metamers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

This is when 2 patches of light have identical wavelengths. Opposite of metamer.

A

Isomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does the Trichromatic Theory of color vision say?

A

Color information is coded by activity in 3 types of cones.

  • 3 types of PR
  • 3 types of Photopigments
  • sensitive to a different wavelength
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

This cone type is an s-cone (shortest wavelength). What color is it?

A
  • Cyanolabe

- blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

This cone type is an m-cone. What color is it?

A
  • Chorolabe

- green

22
Q

This cone type is an l-cone. What color is it?

A
  • Erythrolabe

- red

23
Q

The SWS cones make up what % of cone population?

24
Q

There are how many times more LWS than MWS? What about LWS to SWS?

A
  • 2 x

- 10 x

25
These cones are absent in the central 20 minutes (.3 to .4) degrees of the foveal pit ?
SWS
26
The rhodopsin gene resides on what chromosome?
Chromosome 3
27
The M and L cone genes are on what chromosome?
Chromosome X
28
The S cone gene resides on what chromosome?
chromosome 7
29
What are the 3 Grassman Laws of trichromatic vision?
1. Additive prop 2. Scalar prop 3. Associative prop
30
This law states if the same radiation is added to 2 metamers, they remain metamers.
Law of additive property
31
This law states if the intensity of the 2 metamers is increased or decreased by the same amount, they remain metamers
Scalar Property
32
This law states a match will be maintained if one metamer is substituted for another metamer
Associative Property
33
Color labels are based on what 3 perceptual attributes?
1. Hue 2. Saturation 3. Brightness
34
This is the perception based on wavelength
Hue
35
This is colorimetric purity of fullness, how much "white light" is in the sample
Saturation
36
This is the proportional amount of spectral light in a mixture of the spectral light and a white light.
Colorimetric Purity
37
When no white light is added, what is the colorimetric purity?
1
38
A monochromatic light at what wavelength appears less saturated than a monochromatic light at any other wavelength.
570nm
39
At what wavelength will monochromatic light appear brighter than any other stimuli of equal energy in photopic conditions?
555nm
40
What is the wavelength location of our best color discrimination? What's the difference in wavelength that's needed?
495 and 590 nm | - need at least 2 nm difference to notice
41
Outside of the W curve, the change of wavelength has to be what to determine that the 2 colors are different?
at least 5-6 wavelength difference
42
This phenomenon is the change in hue of most spectral colors that accompanies a change in their intensity.
Bezold-Bruke phenomenon
43
Based on the bezold-bruke effect, as luminance _______, wavelength ________.
- luminance increases | - wavelength decreases
44
This is when all stimulit that fall on a line have the same hue.
Hue contour line
45
In the Bezold-Bruke effect, this refers to the lines that are not tilted. They appear pure. What are they?
Invariant wavelengths - 478nm - blue - 503nm - green - 578nm - yellow
46
This theory is based on the realization that certain pairs of colors are never seen together in the same place at the same time.
Color Opponent Theory
47
What are the 3 opponent systems consisting of bipolar hue channels?
- R/G channel - B/Y channel - Black/White channel coding for brightness
48
Response to one bipolar hue channel is _______ to the other. i.e. Red or green, not both.
antagonistic
49
What type of bipolar cells are color opponent?
Midget bipolar cells
50
The opponent processing curves and hue cancellation predicted what?
The correct location of correct hues from the Bezold Bruke Effect! (478, 503, 578nm)

PPMV 2 (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions