chapter 7 Flashcards
(35 cards)
1
Q
cue approach to depth perception
A
- depth perception results from 3 sources of information
- monocular cues, depth present in the image
- binocular cues, comparison of image in both eyes
- focusing cues, convergence/accomodation
2
Q
monocular depth cues
A
- depth cues that only require one eye
3
Q
pictorial cues
A
- depth information that can be inferred from a static picture
4
Q
movement based depth cues
A
- depth cue
- can be monocular, inference of distance comes from motion
5
Q
occlusion
A
- depth cue
- when one object partially hides a second object
- hidden object further away
6
Q
relative height
A
- depth cue
- objects closer to the horizon are seen as more distant
7
Q
relative size
A
- depth cue
- more distant an object is the smaller the image will be on the retina
8
Q
familiar size
A
- depth cue
- knowing the retinal size of a familiar object at a familiar distance, infer distance
9
Q
linear perspective
A
- pictorial depth cue
- parallel lines converge as they go into the distance
10
Q
texture gradient
A
- monocular depth cue
- textures become finer as they recede into the distance
11
Q
atmospheric perspective
A
- pictorial depth cue
- objects in the distance appear blurred/ blue tint
12
Q
shadows
A
- depth cue
- object is in front of it’s shadow, how far the object is in front of the background
13
Q
motion parallax
A
- monocular depth cue
- closer objects appear to move faster than objects further away
- multiple images across time, relative to the object and person moving
14
Q
deletion
A
- gradual occlusion of a moving object as it passes behind another object
15
Q
accretion
A
- gradual reappearance of a moving object as it emerges from behind another
16
Q
optic flow
A
- motion depth cue
- relative motion of objects as an observer moves backward or forward in a scene
17
Q
convergence
A
- inward bending of the eyes when looking at closer objects
18
Q
stereopsis
A
- sense of depth from comparing different images from each retina
19
Q
binocular disparity
A
- binocular depth cue
- both eyes have slightly different image of the world, comparing the 2
20
Q
corresponding points
A
- situation where a point on the left retina and a point on the right would coincide if both retinae were superimposed
21
Q
noncorresponding points
A
- situation where a point on the left retina and a point on the right wouldn’t coincide if both retinae were superimposed
22
Q
horopter
A
- region in space where 2 images from an object fall on corresponding locations on the 2 retinae
23
Q
diplopia
A
- double images
- too much disparity
24
Q
crossed disparity
A
- direction of disparity for objects closer to the viewer than the horopter
25
uncrossed disparity
- direction of disparity for objects farther from the viewer than the horopter
26
zero disparity
- retinal images fall along corresponding points, object is along the horopter
27
correspondence problem
- problem of determining which image in one eye matches the correct image in the other eye
28
random dot stereograms
- image consists of randomly arranged black and white dots
- focus/ unfocus eyes to see the image
29
binocular cells
- cells with 2 receptive fields, one for each eye
- match images coming to each eye
30
size distance invariance
- relation between perceived size and perceived distance, depend on each other
31
size constancy
- perception of an object having a fixed size despite the change in retinal image
32
müller lyer illusion
33
ponzo illusion
34
ames room
- specially constructed room, two people standing in the 2 back corners will look dramatically different sizes
35
moon illusion
- moon looks bigger near the horizon than overhead
