Deck 3: Image Processing Transformations, Histograms, and Filters

Question 1

How is negative of an image obtained with intensity levels [0,L-1] with "r" and "s" being pixel values?

A)s = l - 1 + r
B)s = l - 1 - r
C)s = l + 1 + r
D)s = l + 1 + r.

Answer 1

s = l - 1 - r

Question 2

The general form of log transformations is ____________________.

A)s = c.log(1 + r)
B)s = c+log(1 + r)
C)s = c.log(1 - r)
D)s = c-log(1 - r)

Answer 2

s = c.log(1 + r)

Question 3

Power-law transformations has the basic form of ________________, where c and ? are constants.

A)s = c + r?
B)s = c - r?
C)s = c * r?
D)s = c / r.?

Answer 3

s = c * r?

Question 4

For what value of the output must the Power-law transformation account for offset?

A)no offset needed
B)all values
C)one
D)zero

Question 5

What is Gamma Correction?

A)a power-law response phenomenon
B)inverted intensity curve
C)light brightness variation
D)none of the mentioned

Question 6

Which process expands the range of intensity levels in an image so that it spans the full intensity range of the display?

A)shading correction
B)contrast sketching
C)gamma correction
D)none of the mentioned

Question 7

Highlighting a specific range of intensities of an image is called ___________.

A)intensity matching
B)intensity highlighting
C)intensity slicing
D)none of the mentioned

Question 8

Highlighting the contribution made to total image by specific bits instead of highlighting intensity-level changes is called ____________________.

A)intensity highlighting
B)byte-slicing
C)bit-plane slicing
D)none of the mentioned

Question 9

Which of the following involves reversing the intensity levels of an image?

A)log transformations
B)piecewise linear transformations
C)image negatives
D)none of the mentioned.

Question 10

Piecewise Linear Transformation function involves which of the following?

A)bit-plane slicing
B)intensity level slicing
C)contrast stretching
D)all of the mentioned

Question 11

What is the basis for numerous spatial domain processing techniques?

A)transformations
B)scaling
C)histogram
D)none of the mentioned

Question 12

In _______ image we notice that the components of histogram are concentrated on the low side on intensity scale.

A)bright
B)dark
C)colourful
D)all of the mentioned

Question 13

What is Histogram Equalisation also called as?

A)histogram matching
B)image enhancement
C)histogram linearisation
D)none of the mentioned

Question 14

What is Histogram Matching also called as?

A)histogram equalisation
B)histogram specification
C)histogram linearisation
D)none of the mentioned

Question 15

Histogram Equalisation is mainly used for _________________________.

A)image enhancement
B)blurring
C)contrast adjustment
D)none of the mentioned

Question 16

To reduce computation if one utilises non-overlapping regions, it usually produces ______ effect.

A)dimming
B)blurred
C)blocky
D)none of the mentioned

Question 17

What does SEM stands for?

A)scanning electronic machine
B)self electronic machine
C)scanning electron microscope
D)scanning electric machine

Question 18

The type of Histogram Processing in which pixels are modified based on the intensity distribution of the image is called _______________.

A)intensive
B)local
C)global
D)random

Question 19

Which type of Histogram Processing is suited for minute detailed enhancements?

A)intensive
B)local
C)global
D)random

Question 20

In uniform PDF, the expansion of PDF is ____________________________.

A)portable document format
B)post derivation function
C)previously derived function
D)probability density function

Question 21

What is accepting or rejecting certain frequency components called as?

A)filtering
B)eliminating
C)slicing
D)none of the mentioned

Question 22

A filter that passes low frequencies is ____________________.

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

Question 23

What is the process of moving a filter mask over the image and computing the sum of products at each location called as?

A)convolution
B)correlation
C)linear spatial filtering
D)non linear spatial filtering

Question 24

The standard deviation controls "____________" of the bell (2-D Gaussian function of bell shape).

A)size
B)curve
C)tightness
D)none of the mentioned

Question 25

What is required to generate an M X N linear spatial filter?

A)mn mask coefficients
B)m+n coordinates
C)mn spatial coefficients
D)none of the mentioned