M.Sc. (Semester IV) (CGPA) Examination Oct/Nov-2017
Computer Science
DIGITAL IMAGE PROCESSING
Day Date: Wednesday, 22-11-2017 M ax. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Question no. 1 and 2 are compulsory.
Attempt any 3 questions from Q. no. 3 to Q. no. 7
Figures to the right indicate full marks.
Q.1 Choose correct alternatives. 10
Which of the following is the correct ascending order of
electromagnetic spectrum based on the energy?
micro wave, ii) gamma ray, iii) radio wave


A binary image has two times rows as compared to columns. If its size
100 bytes, then how many rows are there?
40 60
80 100
The properties of contrast stretching function are
Function should be monotonically decreasing
ii) Function should be single valued
iii) Brings image into dynamic range
and and
and and
Fourier transform separates the function into various components
based on
Pixel location Frequency
Pixel intensity All of the above
An image contains uniform noise minimum and maximum noise
intensity values as 20 and 80. What are the main and variance of its
noise density function?
50 and 300 30 and 300
50 and 25 30 and 25
If opening is performed on a square of 1 sq.cm using structuring
element of triangle having base and height the resulting area will be

Square of half cm each side Zero
Original square Original structuring element
During dam construction in watershed segmentation the different
operations used are
AND, dilation, intersection OR, dilation, union
AND, erosion, intersection OR, erosion union
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The mask used for line detection is
Gaussian Laplacian
Ideal Butterworth
An image contains 4 faces, 2 holes, 5 edges and 3 connected
components. How many vertices are there?
1 2
3 4
10) Suppose the shape numbers of two objects are 00330303 and
003313031. The similarity ratio between them is
0.4 0.5
0.66 1
Fill in the blanks:- 04
The intensity of a pixel in a 6 bit image is 25. Value after applying
negative transform is
The expression for Butterworth highpass filter is
Expression for hit or miss transform is
The rate of change of scope is known as
Q.2 Write short notes on the following. 08
Gray level slicing
Image degradation restoration model
Answer the following: 06
Intensity of pixel 100, 1.5 and 0.5. Find its log and
power-law transform.
Check whether a line with -45 degree inclination exist, if threshold is
250?
43 100 71
31 147 51
94 111 163
Q.3 Answer the following. 14
Discuss image zooming and shrinking methods.
For the following image information perform histogram equalizations:-
Intensity 0 1 2 3 4 5 6 7
No. of pixels 0 160 180 100 40 0 0 0
Q.4 Answer the following. 14
How first derivatives play role in image enhancement? Explain.
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Q.5 Answer the following. 14
Describe logical operations on binary images with example for each.
Perform logical NOT operation on following 8 bit image segment.
56 169 178 69
32 58 94 128
68 129 183 133
135 24 49 64
Q.6 Answer the following. 14
Write region splitting and merging algorithm.
Threshold the following image using Global thresholding algorithm. The
initial threshold may be selected using the midpoint on entire image and
the algorithm iteration must stop when difference of threshold is less than
0.1.
19 189 122 33
242 14 19 75
59 86 44 76
89 65 53 112
Q.7 Answer the following. 14
Explain the use of correlation for matching objects.
Fill the following region using region filling algorithm