Ip mcq- 100 question - Image processing MCQ based notes practice material PDF

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Image processing MCQ based notes practice material...

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1.

Digital functions' derivatives are defined as

a.

differences

b.

multiplication

c.

addition

d.

division

View Answer Report Discuss Too Difficult! Answer: (a).differences

2.

For line detection we use mask that is

a.

Gaussian

b.

laplacian

c.

ideal

d.

butterworth

View Answer Report Discuss Too Difficult! Answer: (b).laplacian

3.

Gradient computation equation is

a.

|Gx|+|Gy|

b.

|Gx|-|Gy|

c.

|Gx|/|Gy|

d.

|Gx|x|Gy|

View Answer Report Discuss Too Difficult! Answer: (a).|Gx|+|Gy|

4.

For finding horizontal lines we use mask of values

a.

[-1 -1 -1; 2 2 2; -1 -1 -1]

b.

[2 -1 -1; -1 2 -1; -1 -1 2]

c.

[-1 2 -1; -1 2 -1; -1 2 -1]

d.

[-1 -1 2; -1 2 -1;2 -1 -1]

View Answer Report Discuss Too Difficult! Answer: (a).[-1 -1 -1; 2 2 2; -1 -1 -1]

5.

If the inner region of the object is textured then approach we use is

a.

discontinuity

b.

similarity

c.

extraction

d.

recognition

View Answer Report Discuss Too Difficult! Answer: (b).similarity

6.

The horizontal gradient pixels are denoted by

a.

Gx

b.

Gy

c.

Gt

d.

Gs

View Answer Report Discuss Too Difficult! Answer: (a).Gx

7.

To avoid the negative values taking absolute values in lapacian image doubles

a.

thickness of lines

b.

thinness of lines

c.

thickness of edges

d.

thinness of edges

View Answer Report Discuss Too Difficult! Answer: (a).thickness of lines

8.

First derivative approximation says that values of constant intensities must be

a.

1

b.

0

c.

positive

d.

negative

View Answer Report Discuss Too Difficult! Answer: (b).0

9.

For finding lines at angle 45 we use mask of values

a.

[-1 -1 -1; 2 2 2; -1 -1 -1]

b.

[2 -1 -1; -1 2 -1; -1 -1 2]

c.

[-1 2 -1; -1 2 -1; -1 2 -1]

d.

[-1 -1 2; -1 2 -1;2 -1 -1]

View Answer Report Discuss Too Difficult! Answer: (b).[2 -1 -1; -1 2 -1; -1 -1 2]

10.

Second derivative approximation says that values along the ramp must be

a.

nonzero

b.

zero

c.

positive

d.

negative

View Answer Report Discuss Too Difficult!

Answer: (b).zero

11.

Ri is a connected set, where is

a.

1,2,3,4

b.

1,2,3…10

c.

1,2,3…50

d.

1,2,3…n

View Answer Report Discuss Too Difficult! Answer: (d).1,2,3…n

12.

Gradient magnitude images are more useful in

a.

point detection

b.

line detection

c.

area detection

d.

edge detection

View Answer Report Discuss Too Difficult! Answer: (d).edge detection

13.

Image having gradient pixels is called

a.

sharp image

b.

blur image

c.

gradient image

d.

binary image

View Answer Report Discuss Too Difficult! Answer: (c).gradient image

14.

In laplacian images light shades of gray level is represented by

a.

0

b.

1

c.

positive

d.

negative

View Answer Report Discuss Too Difficult! Answer: (c).positive

15.

For noise reduction we use

a.

image smoothing

b.

image contouring

c.

image enhancement

d.

image recognition

View Answer Report Discuss Too Difficult! Answer: (a).image smoothing

16.

Diagonal lines are angles at

a.

0

b.

30

c.

45

d.

90

View Answer Report Discuss Too Difficult! Answer: (c).45

17.

Transition between objects and background shows

a.

ramp edges

b.

step edges

c.

sharp edges

d.

Both a and b

View Answer Report Discuss Too Difficult! Answer: (d).Both a and b

18.

Horizontal lines are angles at

a.

0

b.

30

c.

45

d.

90

View Answer Report Discuss Too Difficult! Answer: (a).0

19.

Standard deviation is referred to as noiseless if having the value

a.

0.1

b.

0.2

c.

0.3

d.

0.4

View Answer Report Discuss Too Difficult! Answer: (a).0.1

20.

For edge detection we use

a.

first derivative

b.

second derivative

c.

third derivative

d.

Both a and b

View Answer Report Discuss Too Difficult!

Answer: (a).first derivative

21.

Step edge transition is between pixels over the distance of

a.

1 pixel

b.

2 pixels

c.

3 pixels

d.

4 pixels

View Answer Report Discuss Too Difficult! Answer: (a).1 pixel

22.

Sobel gradient is not that good for detection of

a.

horizontal lines

b.

vertical lines

c.

Diagonal lines

d.

edges

View Answer Report Discuss Too Difficult!

Answer: (c).Diagonal lines

23.

Smoothness reduced the bricks of

a.

pixels

b.

constant intensities

c.

point pixels

d.

edges

View Answer Report Discuss Too Difficult! Answer: (d).edges

24.

Second derivative approximation says that it is nonzero only at

a.

ramp

b.

step

c.

onset

d.

edges

View Answer Report Discuss Too Difficult! Answer: (c).onset

25.

Method in which images are input and attributes are output is called

a.

low level processes

b.

high level processes

c.

mid level processes

d.

edge level processes

View Answer Report Discuss Too Difficult! Answer: (c).mid level processes

26.

Computation of derivatives in segmentation is also called

a.

spatial filtering

b.

frequency filtering

c.

low pass filtering

d.

high pass filtering

View Answer Report Discuss Too Difficult! Answer: (a).spatial filtering

27.

Model of lines through region is called

a.

ramp edges

b.

step edge

c.

roof edges

d.

thinness of edges

View Answer Report Discuss Too Difficult! Answer: (c).roof edges

28.

Transition of intensity takes place between

a.

adjacent pixels

b.

near pixels

c.

edge pixels

d.

line pixels

View Answer Report Discuss Too Difficult! Answer: (a).adjacent pixels

29.

Averaging is analogous to

a.

differentiation

b.

derivation

c.

addition

d.

integration

View Answer Report Discuss Too Difficult! Answer: (d).integration

30.

Response of derivative mask is zero at

a.

sharp intensities

b.

constant intensities

c.

low intensities

d.

high intensities

View Answer Report Discuss Too Difficult!

Answer: (b).constant intensities

31.

Subdivision of the image depends upon the

a.

problem

b.

objects

c.

image

d.

partition

View Answer Report Discuss Too Difficult! Answer: (a).problem

32.

One that is not a method of image segmentation is

a.

area

b.

line

c.

point

d.

edge

View Answer Report Discuss Too Difficult! Answer: (a).area

33.

Discontinuity approach of segmentation depends upon

a.

low frequencies

b.

smooth changes

c.

abrupt changes

d.

contrast

View Answer Report Discuss Too Difficult! Answer: (c).abrupt changes

34.

On ramp and step second derivatives produce

a.

single edge effect

b.

single effect

c.

double edge effect

d.

double line effect

View Answer Report Discuss Too Difficult! Answer: (c).double edge effect

35.

Point detection is done using filter that is

a.

Gaussian

b.

laplacian

c.

ideal

d.

butterworth

View Answer Report Discuss Too Difficult! Answer: (b).laplacian

36.

Second derivatives are zero at points on

a.

ramp

b.

step

c.

constant intensity

d.

edge

View Answer Report Discuss Too Difficult! Answer: (a).ramp

37.

Two regions are said to be adjacent if their union forms

a.

connected set

b.

boundaries

c.

region

d.

image

View Answer Report Discuss Too Difficult! Answer: (a).connected set

38.

8bit image has intensity levels of

a.

0

b.

128

c.

255

d.

256

View Answer Report Discuss Too Difficult! Answer: (d).256

39.

Sobel operators were introduced in

a.

1970

b.

1971

c.

1972

d.

1973

View Answer Report Discuss Too Difficult! Answer: (a).1970

40.

Blurring attenuate the

a.

pixels

b.

points

c.

cross gradient

d.

intensity

View Answer Report Discuss Too Difficult!

Answer: (d).intensity

41.

A line is viewed as

a.

area

b.

edge segment

c.

point

d.

edge

View Answer Report Discuss Too Difficult! Answer: (b).edge segment

42.

Sobel is better than prewitt in image

a.

sharpening

b.

blurring

c.

smoothing

d.

contrast

View Answer Report Discuss Too Difficult! Answer: (c).smoothing

43.

Intensity's local changes can be detected through

a.

differentiation

b.

derivation

c.

addition

d.

integration

View Answer Report Discuss Too Difficult! Answer: (b).derivation

44.

For line detection we assume that lines are

a.

thin

b.

thick

c.

sharp

d.

blur

View Answer Report Discuss Too Difficult! Answer: (a).thin

45.

Example of similarity approach in image segmentation is

a.

edge based segmentation

b.

boundary based segmentation

c.

region based segmentation

d.

Both a and b

View Answer Report Discuss Too Difficult! Answer: (c).region based segmentation

46.

The preferred direction of mask is weighted with the

a.

low value coefficients

b.

high value coefficients

c.

mid value coefficients

d.

double value coefficients

View Answer Report Discuss Too Difficult! Answer: (b).high value coefficients

47.

Points other than exceeding the threshold in output image are marked as

a.

0

b.

1

c.

11

d.

x

View Answer Report Discuss Too Difficult! Answer: (a).0

48.

In laplacian images dark shades of gray level is represented by

a.

0

b.

1

c.

positive

d.

negative

View Answer Report Discuss Too Difficult! Answer: (d).negative

49.

Pixels where intensity changes abruptly are called

a.

area pixels

b.

line pixels

c.

point pixels

d.

edge pixels

View Answer Report Discuss Too Difficult! Answer: (d).edge pixels

50.

Isolated point is also called

a.

edge point

b.

noise point

c.

ramp

d.

step

View Answer Report Discuss Too Difficult!

Answer: (b).noise point

51.

Points exceeding the threshold in output image are marked as

a.

0

b.

1

c.

11

d.

x

View Answer Report Discuss Too Difficult! Answer: (b).1

52.

Example of discontinuity approach in image segmentation is

a.

edge based segmentation

b.

boundary based segmentation

c.

region based segmentation

d.

Both a and b

View Answer Report Discuss Too Difficult! Answer: (d).Both a and b

53.

First derivative approximation says that values of intensities at the onset must be

a.

nonzero

b.

zero

c.

positive

d.

negative

View Answer Report Discuss Too Difficult! Answer: (a).nonzero

54.

Image segmentation is also based on

a.

morphology

b.

set theory

c.

extraction

d.

recognition

View Answer Report Discuss Too Difficult! Answer: (a).morphology

55.

Image whose principle features are edges is called

a.

orthogonal

b.

isolated

c.

edge map

d.

edge normal

View Answer Report Discuss Too Difficult! Answer: (c).edge map

56.

Vertical lines are angles at

a.

0

b.

30

c.

45

d.

90

View Answer Report Discuss Too Difficult! Answer: (d).90

57.

If R is the entire region of the image then union of all segmented parts should be equal to

a.

R

b.

R'

c.

Ri

d.

Rn

View Answer Report Discuss Too Difficult! Answer: (a).R

58.

Mask's response to zero means

a.

sum to zero

b.

subtraction to zero

c.

division to zero

d.

multiplication to zero

View Answer Report Discuss Too Difficult! Answer: (a).sum to zero

59.

Lines in an image can be oriented at angle

a.

0

b.

90

c.

30

d.

Both a and b

View Answer Report Discuss Too Difficult! Answer: (d).Both a and b

60.

Laplacian images need

a.

contraction

b.

expansion

c.

scaling

d.

enhancement

View Answer Report Discuss Too Difficult!

Answer: (c).scaling

61.

For point detection we use

a.

first derivative

b.

second derivative

c.

third derivative

d.

Both a and b

View Answer Report Discuss Too Difficult! Answer: (b).second derivative

62.

Textured inner region of the object produces

a.

good boundary extraction

b.

excellent boundary extraction

c.

good boundary deletion

d.

excellent boundary deletion

View Answer Report Discuss Too Difficult!

Answer: (a).good boundary extraction

63.

If the standard deviation of the pixels is positive, then sub image is labeled as

a.

black

b.

green

c.

white

d.

red

View Answer Report Discuss Too Difficult! Answer: (c).white

64.

Thresholding gives the

a.

large image

b.

gray scale image

c.

color image

d.

binary image

View Answer Report Discuss Too Difficult! Answer: (d).binary image

65.

Marr hildreth method was introduced in

a.

...