Deck 11: Depth Perception

Question 1

When viewing an object of fixed size from increasingly distant viewpoints, its retinal area:

A) Varies non-linearly with distance
B) Varies linearly with distance
C) Remains fixed as distance changes
D) Varies unpredictably with distance

Answer 1

A

Question 2

The range of distances over which there is no perceptible image blur is known as:

A) Accommodative range
B) Depth of field
C) Disparity limit
D) Diplopia limit

Answer 2

B

Question 3

Changes in vergence yoked to changes in:

A) Object distance
B) Accommodation
C) Binocular disparity
D) Height in the visual field

Answer 3

B

Question 4

Binocular disparities occur because the two eyes view objects from slightly different viewing:

A) Distances
B) Heights
C) Angles
D) Planes

Question 5

The problem of matching image features in the eyes is called the stereo:

A) Correspondence problem
B) Aperture problem
C) Equivalence problem
D) Similarity problem

Question 6

Which of the following has not been proposed as a stereo matching constraint?

A) Epipolarity
B) Vertical disparity
C) Similarity in contrast
D) Similarity in orientation

Question 7

Neurons tuned to disparity are found:

A) Only in V1
B) Only in V3
C) Only in V4
D) In multiple areas of visual cortex

Question 8

Larger eye separation (inter-ocular distance):

A) Has no effect on binocular disparity
B) Increases binocular disparity
C) Reduces binocular disparity
D) Destroys binocular disparity

Question 9

Cue magnitude for disparity, image blur, vergence, accommodation, and image size:

A) Varies linearly with 1/distance
B) Varies linearly with distance2
C) Varies linearly with distance
D) Varies linearly with √ distance

Question 10

Research indicates that texture gradients are most effective as a depth cue for slants greater than:

A) 50 degrees from vertical
B) 20 degrees from vertical
C) 10 degrees from vertical
D) 5 degrees from vertical

Question 11

While viewing objects laying on a ground plane, their height in the visual field:

A) Does not change with distance from the observer
B) Varies in the same way for all observers
C) Varies less rapidly for smaller observers
D) Varies more rapidly for smaller observers

Question 12

When two walking figures move across your field of view, one twice as far as the other, the image of the farther walker will:

A) Move at twice retinal velocity of the nearer walker
B) Move at the same retinal velocity as that of the nearer walker
C) Move at half retinal velocity of the nearer walker
D) Will appear to be stationary on the retina.

Question 13

Which cue can be used to estimate the absolute depth of an object?

A) Interposition
B) Vergence
C) Height in the visual field
D) Texture gradient

Question 14

Accommodation is controlled by:

A) The extra-ocular muscle
B) The sphincter muscle
C) The choroid muscle
D) The ciliary muscle

Question 15

Which of the following cues only offers only an ordinal cue to depth?

A) Interposition
B) Vergence
C) Height in the visual field
D) Texture gradient

Question 16

Convergence of railway tracks as they disappear into the distance is an example of:

A) Height in the visual field
B) Atmospheric perspective
C) Perspective gradient
D) Vergence angle

Question 17

A crossed horizontal binocular disparity of 5 degrees will:

A) Correspond to a point farther away than fixation
B) Appear diplopic
C) Allow very fine depth discrimination
D) Correspond to a point the same distance as fixation

Question 18

Lawful variation in the number of texture elements per unit area in the image is known as:

A) Density gradient
B) Perspective gradient
C) Compression gradient
D) Size gradient

Question 19

Research indicates that depth cue combination in the human visual system involves:

A) Multiplying the cue values
B) Taking a weighted average of cue values
C) Ignoring all except one cue value
D) Accepting several cue values as equally viable