high-level vision

Question 1

recognition

Answer 1

experience of having perceived an object; don’t have to know what it is or how to use it

Question 2

identification

Answer 2

ability to name object/know something about it

Question 3

is object perception a hierarchy?

Answer 3

no

Question 4

examples of how high level affects lower levels

Answer 4

meaning affects figure-ground (mid) and edge extraction (low)

Question 5

two theories of object recognition

Answer 5

-pandemonium model of letter recognition
-structural description (recognition by components)

Question 6

pandemonium model of letter recognition

Answer 6

-feature demons shout when their feature is detected
-cognitive demons shout when their combo of features is detected
-the demon that shouts the loudest wins

Question 7

advantages of the pandemonium model of letter recognition

Answer 7

-accounts for mistakes in letter perception
-machine design that read account # on cheques
-multiple levels of processing & parallel processing

Question 8

disadvantages of the pandemonium model of letter recognition

Answer 8

-only one aspect of object recognition
-too many templates

Question 9

structural description

Answer 9

conceptual representation based on an object’s parts and the relationships between the parts; if can perceive the geons, then can recognize the object

Question 10

what does structural description theory falsely claim about viewpoint and what evidence?

Answer 10

that viewpoint does not matter when in fact it does; greebles

Question 11

advantages of structural description

Answer 11

-novel objects can be described as sets of geons and assigned a category
-robot design to pick up cans

Question 12

disadvantages of structural description

Answer 12

-hard to describe all objects in terms of geons
-hard to discriminate objects in same class
-does actually depend on viewpoint