2. Object Recognition

Question 1

What is perception? (ccc object recognition)

Answer 1

Our ability to extract meaning from sensory input

Question 2

What does perception include? (ccc object recognition)

Answer 2

• Audition
• Taste
• Touch
• Olfaction (Smell)

Question 3

How many different types of senses do we have? (ccc object recognition)

Answer 3

9 - 22

Question 4

What does the brain receive in the visual system? (ccc object recognition)

Answer 4

Sensory input

Question 5

What does the cognitive system do in the visual system? (ccc object recognition)

Answer 5

Constructs the perception

Question 6

What is the only part of the eye with a good clarity of vision? (ccc object recognition)

Answer 6

Fovea

Question 7

What is the size of the blind spot for a human? (ccc object recognition)

Answer 7

An orange held at arms length

Question 8

What pathway tells the brain ‘where’? (ccc object recognition)

Answer 8

The dorsal pathway

Question 9

What pathway tells the brain ‘what’? (ccc object recognition)

Answer 9

The ventral pathway

Question 10

What happens to image on the retina? (ccc object recognition)

Answer 10

It is inverted

Question 11

What receives the encoded image of the visual fields from both eyes? (ccc object recognition)

Answer 11

The cerebral cortex

Question 12

What is stage one of processing images? (ccc object recognition)

Answer 12

• Local features

- Edge detection and contrast can be seen

Question 13

What is stage two of processing images? (ccc object recognition)

Answer 13

• Shape representation

- Gestalt principles and basic features

Question 14

What is stage three of processing images? (ccc object recognition)

Answer 14

• Object representation

- Stored representation/knowledge

Question 15

What is Gestalts principle? (ccc object recognition)

Answer 15

The whole visual percept is more than the sum of its parts

Question 16

What processing is shape perception? (ccc object recognition)

Answer 16

Bottom up

Question 17

What are the three stages to Marr’s Computational model? (ccc object recognition)

Answer 17

1) Primal sketch
2) 2 1/2 D sketch
3) The 3D model

Question 18

What is stage one of Marr’s Computational model? (ccc object recognition)

Answer 18

• Variations of light
• Similar to a line drawing
• Detection of edges

Question 19

What is stage two of Marr’s Computational model? (ccc object recognition)

Answer 19

• Orientation is present
• Distance can be seen
• Depth is visible

Question 20

What is stage three of Marr’s Computational model? (ccc object recognition)

Answer 20

• Volume/space present
• Object entered, not viewer centred
• Shape fully understood

Question 21

What is template matching? (ccc object recognition)

Answer 21

A theory that suggests a template is an internal representation. Template becomes a memory of which visual input can be matched to.

Question 22

What is template matching also known as? (ccc object recognition)

Answer 22

Prototype theory

Question 23

What does feature analysis assume? (ccc object recognition)

Answer 23

• Lower level features are analysed first

- Individual features are analysed and defined

Question 24

Why is feature analysis flawed? (ccc object recognition)

Answer 24

V and X are both made up of / and \

Question 25

What are geons? (ccc object recognition)

Answer 25

The viewpoint of an object, where on its own it is distinguished as a 2D object. When termination points are removed (by shading), the image becomes 3D.