Brainscape's Knowledge GenomeTM

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


See full index

perception > binocular vision > Flashcards

binocular vision Flashcards

1
Q

what is euclidian geometry?

A

parallel lines remain parallel as they are extended in place

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

are the images projected onto the retina euclidean?

A

no

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

how can euclidian geometry be explained?

A

objects maintain in the same size and shape as they move around space

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

whats binocular summation?

A

the combination of signals from each eye in ways that make performance on many tasks better with both eyes than with either eye alone

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

what is binocular disparity?

A

the differences between the two retinal images of the same scene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is stereopsis?

A

a vivid perception of the three dimensionality of the world that is not available with monocular vision

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

what is a depth cue?

A

information about the third dimension of visual space

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

what is a monocular depth cue?

A

a depth cue that is available even when the world is viewed with one eye alone

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

what is a monocular depth cue?

A

a depth cue that relies on info from both eyes

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

what is a binocular depth cue?

A

a depth cue that relies on info from both eyes

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

what is occlusion?

A

a cue to relative depth order in which, one object obstructs the view of another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is a metrical depth cue?

A

a depth cue that provides quantitative info about distance in the third dimension

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

what is a nonmetrical depth cue?

A

a depth cue that provides info about the depth order but not depth magnitude

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

what is relative size cue?

A

a comparison of size between items without knowing the absolute size of either one

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

what is relative height?

A

below the horizon, objects higher in the visual field appear further away. above, objects lower in the field appear to be further

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

what is texture gradient?

A

a depth cue based on the geometric fact that items of the same size form smaller images when they are further away

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

whats the cause of texture gradients?

A

results from a combination of the cues of relative size and relative height

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

what is familiar size?

A

a cue based on knowledge of the typical size of objects

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

what is aerial perspective?

A

a depth cue based on the implicit understanding that light is scattered by the atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is the effect of the aerial perspective?

A

more light is scattered when we look through more atmosphere so more distant objects appear fainter and bluer

21
Q

what is linear perspective?

A

lines that are parallel in the three dimensional world will appear to converge in a two dimensional image as they extend into the distance

22
Q

what is the vanishing point?

A

the apparent point at which parallel lines receding in depth converge

23
Q

what is the motion parallax?

A

images closer to the observer move faster across the visual field than images further away

24
Q

what is accomodation?

A

the process by which the eye changes its focus

25
Q

what happens when the eye accomodates?

A

the lens gets fatter as gaze is directed toward nearer objects

26
Q

what is convergence?

A

the ability of the two eyes to turn inward, often used to focus on nearer objects

27
Q

what is divergence?

A

the ability of the two eyes to turn outward, often used to focus on farther objects

28
Q

what are corresponding retinal points?

A

a geometric concept stating that points on the retina of each eye where the monocular retinal images of a single object are formed are at the same distance from the fovea in each eye

29
Q

what is binocular disparity?

A

the difference between the two retinal images of the same scene

30
Q

what is the vieth muller circle?

A

the location of objects whose images fall on geometrically corresponding points on the two retinas

31
Q

what is horopter?

A

the location of objects whose images lie on the corresponding points. surface of 0 disparity.

32
Q

how are objects on the horopter seen?

A

as single images when viewed with both eyes

33
Q

what is panum’s fusional area?

A

the region of space infront and behind the horopter, within which binocular single vision is possible

34
Q

how are images seen when objects are closer or further away from the hotopter?

A

if they fall on noncorresponding points in the two eyes they are seen as two images

35
Q

what is diplopia?

A

double vision

36
Q

what happens if stimuli falls outside of panum’s?

A

if visible in both eyes it will appear diplopic

37
Q

what is crossed disparity?

A

the sign of disparity created by objects in front of the plane of the horopter

38
Q

how are images dispaced in front of the horopter?

A

displaced to the left in the right eye and to the right in the left eye

39
Q

what is free fusion?

A

the technique of converging or diverging (uncrossing) the eyes in order to view a stereogram without a stereoscope

40
Q

what is stereoblindness?

A

an inability to make use of binocular disparity as a depth cue

41
Q

what is the correspondence problem?

A

in binocular vision, the problem of figuring out which bit of the image in the left eye should be matched with which bit in the right eye

42
Q

what are ways to solve the correspondence problem?

A
  • blurring the image
  • uniqueness constraint
  • continutity constraint
43
Q

how does blurring the image help with correspondance?

A

leaves only the low spatial frequency info which reduces the number of features

44
Q

how does uniqueness constraint help correspondence?

A

the observation of a feature in the world is represented exactly once in the retinal image

45
Q

how does continuity constraint help correspondence?

A

the observation that except at the edges of objects, neighbouring points in the world lie at similar distances from the viewer

46
Q

how do most binocular neurons respond best when the retinal images are on corresponding points?

A

with zero disparity

47
Q

what is another way neurons respond best?

A

when similar images occupy slightly different positions on the retinas of the two eyes

48
Q

what is binocular rivalry?

A

the competition between the two eyes for control of visual perception, which is evident when completely different stimuli are presented to the two eyes

49
Q

what is forced perspective?

A

when near and far objects are carefully aligned so that they appear to be interacting with eachother

perception (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions