Deck 4: Image Processing Techniques and Fuzzy Logic

Question 1

What is the difference between Convolution and Correlation?

A)image is pre-rotated by 180 degree for correlation
B)image is pre-rotated by 180 degree for convolution
C)image is pre-rotated by 90 degree for correlation
D)image is pre-rotated by 90 degree for convolution

Answer 1

image is pre-rotated by 180 degree for convolution

Question 2

Convolution and Correlation are functions of __________________.

A)distance
B)time
C)intensity
D)displacement

Answer 2

displacement

Question 3

The function that contains a single 1 with the rest being 0s is called ____________________.

A)identity function
B)inverse function
C)discrete unit impulse
D)none of the mentioned

Answer 3

discrete unit impulse

Question 4

Which of the following involves Correlation?

A)matching
B)key-points
C)blobs
D)none of the mentioned.

Question 5

An example of a continuous function of two variables is _____________

A)identity function
B)intensity function
C)contrast stretching
D)gaussian function

Question 6

The output of a smoothing, linear spatial filtering is a ____________ of the pixels contained in the neighbourhood of the filter mask.

A)sum
B)product
C)average
D)dot product

Question 7

Averaging filters is also known as ____________ filter.

A)low pass
B)high pass
C)band pass
D)none of the mentioned

Question 8

What is the undesirable side effects of Averaging filters?

A)no side effects
B)blurred image
C)blurred edges
D)loss of sharp transitions

Question 9

A spatial averaging filter in which all coefficients are equal is called _______________.

A)square filter
B)neighbourhood
C)box filter
D)zero filter

Question 10

Which term is used to indicate that pixels are multiplied by different coefficients?

A)weighted average
B)squared average
C)spatial average
D)none of the mentioned

Question 11

The non linear spacial filters whose response is based on ordering of the pixels contained is called _____________.

A)box filter
B)square filter
C)gaussian filter
D)order-statistic filter

Question 12

Impulse noise in Order-statistic filter is also called as _______________.

A)median noise
B)bilinear noise
C)salt and pepper noise
D)none of the mentioned

Question 13

Best example for a Order-statistic filter is ____________________.

A)impulse filter
B)averaging filter
C)median filter
D)none of the mentioned

Question 14

What does "eliminated" refer to in median filter?

A)force to average intensity of neighbours
B)force to median intensity of neighbours
C)eliminate median value of pixels
D)none of the mentioned.

Question 15

Which of the following is best suited for salt-and-pepper noise elimination?

A)average filter
B)box filter
C)max filter
D)median filter

Question 16

What is the set generated using infinite-value membership functions, called?

A)crisp set
B)boolean set
C)fuzzy set
D)all of the mentioned

Question 17

Which is the set, whose membership only can be true or false, in bi-values Boolean logic?

A)boolean set
B)crisp set
C)null set
D)none of the mentioned

Question 18

If Z is a set of elements with a generic element z, i.e. Z = {z}, then this set is called _____________

A)universe set
B)universe of discourse
C)derived set
D)none of the mentioned

Question 19

A fuzzy set 'A' in Z is characterized by a ____________ that associates with element of Z, a real number in the interval [0, 1].

A)grade of membership
B)generic element
C)membership function
D)none of the mentioned

Question 20

A fuzzy set is ________ if and only if membership function is identically zero in Z.

A)empty
B)subset
C)complement
D)none of the mentioned

Question 21

Which of the following is a type of Membership function?

A)triangular
B)trapezoidal
C)sigma
D)all of the mentioned

Question 22

Which of the following is not a type of Membership function?

A)s-shape
B)bell shape
C)truncated gaussian
D)none of the mentioned

Question 23

Using IF-THEN rule to create the output of fuzzy system is called __________.

A)inference
B)implication
C)both the mentioned
D)none of the mentioned

Question 24

What is the independent variable of fuzzy output?

A)maturity
B)membership
C)generic element
D)none of the mentioned

Question 25

Which of the following is not a principle step in fuzzy technique?

A)fuzzify input
B)apply implication method
C)defuzzify final output
D)none of the mentioned