Depth Perception

Question 1

Kinetic Depth (KDE) cue

Answer 1

Arises as object move relative to us. As the object moves parts of its surface move across the retinal image at different speeds.

Question 2

2 Issues of a reliance on depth cues

Answer 2

• Ambiguity
• Integration of multiple cues

Question 3

How do we overcome ambiguity of cues

Answer 3

Prior knowledge, prior assumptions gained through experience of the world.

Question 4

Multi-cue integration can not only create a unified precept but also….

Answer 4

Solve problems of:

• Ambiguity
• Conflict
• Reliability

Question 5

Compromise

Answer 5

Taking an average, but taking into account how RELIABLE each cue is

Question 6

Dominance

Answer 6

When two cues define very different shapes or depths, the brain may choose to ignore one in favour of the other.

Question 7

Interaction

Answer 7

Some cues are ambiguous but other cues can disambiguate them.

Question 8

Model of Cue Integration (Landy et al. 1995)

Answer 8

1. Interaction Stage
2. Compromise Stage

Question 9

Interaction Stage

Answer 9

Stronger, less ambiguous cues help to resolve or “promote” weaker, more ambiguous cues.

Question 10

Compromise Stage

Answer 10

After cue promotion, the visual system engages in a process of compromise where it combines the now-compatible cues through weighted averaging.