Lecture 13

Question 1

What is motion vision used for?

Answer 1

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Question 2

What is inner loop control? What are examples?

Answer 2

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Question 3

What is outer loop control? What are examples?

Answer 3

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Question 4

What are examples of other ways in which motion vision is used for?

Answer 4

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Question 5

What happens when there is motion blur?

Answer 5

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Question 6

What is the snaps shot in a rotational movement? What is the snap shot in a translation movement?

Answer 6

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Question 7

What does the length of the arrow depend on? Which movement is this in?

Answer 7

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Question 8

What is a parallex vector? What does it depend on? What is the equation?

Answer 8

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Question 9

Why is this vector useful?

Answer 9

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Question 10

What are the motion axis of the animal? What are the different movements along each axis? What do they combine to form?

Answer 10

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Question 11

What do you do for the individual directions?

Answer 11

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Question 12

What happens when there is a pure translation component?

Answer 12

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Question 13

What happens when there is only a pure rotational component?

Answer 13

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Question 14

What are the structures of the global flow- fields in translation and rotation? What are the differences?

Answer 14

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Question 15

How to map 3D –> 2D plane? What is found in the 2D planes?

Answer 15

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Question 16

What is the distance between each unit?

Answer 16

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Question 17

Given that we can measure the distribution of parallax vectors in an optic flow, how do we estimate T and R? What is the equation? Why do we have to do this?

Answer 17

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Question 18

What is the KvD method?

Answer 18

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Question 19

What is the problem with this in the translation aspect?

Answer 19

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Question 20

How has this problem been solved? How is the equation changed?

Answer 20

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Question 21

How does this new equation change stuff in the rotation aspect?

Answer 21

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Question 22

What is the method used to minimise the error, E, between a set of observed parallax vectors, and estimated parallax vectors? i.e. what is a method to measure optic flow?

Answer 22

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Question 23

What are the equations for the estimates of t, R and µ? What do the different components mean?
a. What is I?
b. What is v ?
c. What is the circle with the x in it?
What is ?

Answer 23

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Question 24

What are the components of the t and R estimate equations that consider the opposite in that equation? Why does this occur? How to minimise this problem? What term does it affect?

Answer 24

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Question 25

Why is this method robust?

Answer 25

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Question 26

How to assess the potential of the method? What is the graph to plot? What would the results show?

Answer 26

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Question 27

How does perturbation compare to the root mean squared (RMS) of the deviation of results? What is the relationship?

Answer 27

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Question 28

How many points to use to give a good estimate? What graph shows this? What was the results for number of points to give a good estimate?

Answer 28

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Question 29

What does this mean in terms of insects?

Answer 29

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Question 30

What are the problems with the KvD? What are the problems biologically?

Answer 30

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Question 31

What is an alternative way of analysing visual motion? What is it called?

Answer 31

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Question 32

What is LK?

Answer 32

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Question 33

What are the steps?

Answer 33

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Question 34

What are the formulas of the LK method? How to apply LK?

Answer 34

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Question 35

What is the motion constraint? How to get it from the LK?

Answer 35

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Question 36

How to implement the LK?

Answer 36

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Question 37

What are the problems which can arise? How to solve this?

Answer 37

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Question 38

How does LK compare to KvD?

Answer 38

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Question 39

How do other approached vary to?

Answer 39

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