M.Sc. (Computer Science) (Semester III) (CBCS)
Examination, 2017
DIGITAL IMAGE PROCESSING
Day Date: Tuesday, 25-04-2017 Max. Marks: 70
Time: 2:30 PM to 05.00 PM
N.B.: Q.1 and Q2 are compulsory.
Attempt any 3 Questions from Q .No 3 to No.7
Figures to the right indicate full marks.
Q.1 Choose the correct alternatives: 10
In the applications which use nuclear used.
rays Gamma rays
Ultraviolet rays Microwave
Due to considerations, the number of gray levels is
usually an integer power of 2.
Hardware Software Firmware Both and(b)
The storage space required for storing an image of size 128 x
64 with 128 gray levels is KB.
56 1024 7 128
min filter is a filter.
Order statistic Averaging
Sharpening Noise reduction
Which statement is/ are correct?
i. In a Fourier transformed image at location F
average value is available.
ii. High pass filter is useful to reduce effect of small dots
Both and None
Which of the following is not an order statement filter?
Median filter Min filter
Midpoint filter None of these
When an opening is performed on an equilateral triangle of
each side 3 cm using a structuring element which is right
angle triangle with base and height the change in the area
of result will
Area remains same but shape changes
Page 2 of 3
Area and shape remains same
Area increases
Area decreases
Hough transform is used
Global processing
Linking edge and detecting boundary
Detecting lines
All the above
A region contains 3 faces, 7 connected components, 2 holes
and 9 vertices. How many edges are there?
1 3 5 7
10) In the year 1936 Fisher presented a technique for
classification of object called
Discriminant analysis Discrimination analysis
Description analysis Description analysis
Fill in the blanks 04
D8 distance between pixels at coordinates 12) and
is
Expression for Butterworth lowpass filter
The PDF for exponential noise
For sub regions R1, R2…., Rn Partitioned in region P
TRUE for i 2,…., where is a
Q.2. Write short notes on the following: 08
Image formation model.
Uniform noise.
Answer the following: 06
Comparison between first and second order derivatives.
Given the threshold as 150, check whether a line inclined
at 45 passes through following image;
38 76 44
84 65 122
100 22 16
Q.3 Answer the following: 14
Discuss adjacencies with suitable examples.
Apply global thresholding algorithm on following image to obtain
binary image by selecting initial threshold using mid-point filter.
Iteration of algorithm must stop when difference of threshold is
less than 0.2
8 0 9
10 14 12
13 15 7
Q.4 Answer the following:
Describe Butterworth low pass filter. Compare it with others. 14
Page 3 of 3
Find inner and outer boundary of the following image using 3x3
square structuring element:
Q.5 Answer the following 14
Discuss Gaussian and Rayleigh noise. Compare them.
Fill following region using cross structuring element.
Q.6 Answer the following 14
How to detect edge? Explain.
Find mean and covariance matrix for the vectors
and
14
Q.7 Answer the following
Discuss matching the objects using correlation. 14
Compute midpoint matrix for the following. Consider only values
within the boundary of matrix for computation.
37 12 19
03 76 45
53 98 62