Lecture 4: Object Perception

Question 1

3 Reasons why it’s so difficult for machine to perceive

Answer 1

1) stimulus on receptors is ambiguous
2) objects can be hidden or blurred
3) objects look different from different viewpoints

Question 2

Inverse projection problem

Answer 2

an image on retina can be caused by an infinite number of objects

Question 3

Viewpoint invariance

Answer 3

ability to recognise an object regardless of the viewpoint

Question 4

2 characteristics of Perceptual organisation approach- Wundt

Answer 4

1) perceptions are created by combining elements called sensations
2) structuralism could not explain apparent movement

Question 5

Theory of unconscious inference

Answer 5

Helmholtz, explain why stimuli can be interpreted in more than one way

Question 6

Likelihood principle

Answer 6

objects are perceived based on what is most likely to have caused the pattern

Question 7

How do feature detectors respond to a scene

Answer 7

tiling

Question 8

What is tiling?

Answer 8

columns working together to cover entire visual scene

Question 9

Object discrimination and what inhibits this?

Answer 9

picking the correct shape, lesioning in the temporal lobe

Question 10

Landmark discrimination and what inhibits this?

Answer 10

picking the closer option, lesioning in parietal lobe

Question 11

What pathway

Answer 11

ventral pathway from occipital lobe to temporal lobe

Question 12

Where pathway

Answer 12

dorsal pathway from occipital lobe to parietal lobe