biological perceptual visual

Question 1

Depth cues

Answer 1

are sources of information from the environment (external cues) or from within our body (internal cues) that help us perceive how far away objects are.

Question 2

Convergence

Answer 2

(BINOCULAR) visual perception depth cue involving the inwards turning of the eyes to focus on nearby objects. Brain detects depth by how much tension is in the eye muscles as they turn the eyes inward.
More tension = closer
Less tension = further away

Question 3

Retinal Disparity

Answer 3

(Binocular) is a visual depth cue based on the difference/disparity of the retinal images.
brain compares the images and the disparity from both retinas and is then able to judge depth/distance.
the binocular cue in this case is only good for perceiving depth of objects that are relatively close = there is little retinal disparity beyond approx. 10 metres.

Question 4

Accommodation

Answer 4

(Monocular) depth cue involving the automatic focusing of the lens in the eye in response to changes in distance of view from an object.
perceives distance based on the ciliary muscles (which control the lens shape) contracting (lens bulging) and expanding (lens flattening)
Close = lens bulges
Far away = lens flatten

Question 5

Linear perspective

Answer 5

is the apparent convergence of parallel lines as they recede into the distance

Question 6

interposition

Answer 6

(overlap) is when one object partially blocks or covers another, and the partially covered object is perceived as further away.

Question 7

relative size

Answer 7

refers to the tendency to visually perceive the object that produces the largest image on the retina as being closer and the objects that produces the smaller image as being further away.

Question 8

height in the visual field

Answer 8

refers tot he location of objects in our field of vision, whereby objects that are located closer to the horizon are perceived as being more distant than objects located further from the horizon.

Question 9

Visual Perception Factors

Answer 9

‘Rules’ that we apply to visual information to assist our organization and interpretation of the information in consistent and meaningful ways.

Question 10

Texture gradient

Answer 10

refers to the gradual reduction of detail in a surface as it recedes into the distance (as compared with the fine detail of a close up surface).