M.Sc. (Semester III) (CBCS) Examination Nov/Dec-2018
Computer Science
DIGITAL IMAGE PROCESSING
Time 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Q.1 Multiple choice questions 14
Which of the following is not alternative word used for pixels?
Image elements Pils
Picture elements None of the above
The ultrasound imaging technology used high frequency sound pulses in the
range of
1-5 MHz 5-10 MHz
10-100 MHz 100-1000 MHz
During image formation, the illumination and reflectance are as follow:
Both illumination and reflectance are finite quantities
Illumination is finite, and reflectance may be infinite
Illumination may be infinite, and reflectance is finite
Both illumination and reflectance are finite quantities
Identify odd from the following list:
Log transform Identity transform
Exponential transform Nth root transform
Which of the following logical operation is functionally complete?
NOT NAND
X-OR NOR
The important features of Fourier spectrum are
i. The height of the spectrum doubles as the length of the function in the
domain doubles
ii. The number of zeros in the spectrum in the same interval doubled as the
area under the curve doubled
is true is true
Bothe are true Both are false
Which of the following statement is true for Ideal lowpass filter function?
i. Filter function is very smooth
ii. Filter used for sharpening
is true is true
Both are true Both are false
Which of the following noise functions have mathematical tractability in the
spatial as well as frequency domains
Gaussian Exponential
Uniform Rayleigh
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Hit-or-miss transform can be used to remove objects the search
objects X.
smaller and larger than
small along row and larger along column
small along column and larger along row
all above
10) To find lines in all eight different directions number of marks used are
2 4 8
8 9
11) After segmentation of an image (Select true statements)
i. Pixels within a segmented region need to be connected
ii. Every pixel will be in atleast one or more regions
iii. Regions must be disjoint
and and
and All
12) The unit used to measure compactness of area is
Meter Meter2
Pixel2 No unit
13) In 1936, Fisher proposed a technique known as
discrimination analysis discriminative analysis
discriminant analysis discriminating analysis
14) Degree of similarity between two shapes is expressed in the form of
String Positive integer
Positive real number Any number
Q.2 Answer any four of the following. 08
What are the developments that lead to birth of modern digital image
processing?
What is gamma correction? Why it is important?
Compute log and power-law transformations when applied on pixel with
intensity 10, c=2 and gamma 1.5
Define Ideal Bandreject filter.
Give the expression of correlation coefficient.
Write note on any two. 06
Define digital path.
What are the basic steps for filtering in frequency domain?
What is adaptive thresholding? When it is used?
Q.3 Answer any two of the following. 08
What are the quantities used to describe the quality of a chromatic light
source? Define them.
Discuss Butterworth lawpass filter.
How to detect lines from an image? Discuss.
Answer any one of the following. 06
For the following intensities perform histogram equalization:
Intensity 0 1 2 3 4 5 6 7 8 9 10 11
No. of pixels 0 20 12 16 14 18 25 17 0 0 0 0

Find mean vector and covariance matrix for the following vectors:
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Q.4 Answer any two of the following. 10
What are the frequencies available in visible spectrum? Give their
properties.
What are different order statistics filters? Discuss them
How American Bankers Association E-13B font characters are
recognized? Explain.
Answer any one of the following. 04
Perform erosion of a rectangle having base 8 cm and height 6 cm using
circle of radius 1 cm.
Two 6-bit gray scale images are given. Perform OR operation.
58 22 36
42 13 2
53 49 64
18 38 47
29 4 51
41 33 19
d
Q.5 Answer any two of the following. 14
Write algorithm for adaptive, local noise reduction filter.
Fill the following image with cross SE:
Calculate chain code, difference code and shape number for the following and
find out which two shapes have highest match among them based on similarity