Indian Institute of Information Technology, Lucknow
Mid-semester Examination March 2022
Image and Video Processing (IVP631E/ IVP631C/ IVP231C)
Regular and Back Paper
Date of Examination: 16/03/2022; 03:00 PM to 05:00 PM
QPS: Dr. Soumendu Chakraborty
Duration: 2 hr
Total Mark: 30
There are 5 questions. All questions are compulsory.
Students should write their roll number in the answer sheet. The scanned copy of the answer sheet
should be submitted in a single file. Scanning and uploading time is included in the total duration.
Necessary assumptions can be taken if and only if some required information is missing.
Q.1. a) If V = {2,3,4}, compute the 4 and 8 connected components of the pixels (p), (q), (r) in the
sub-image shown in Fig.1(a). Show the components by giving unique names to unnamed
pixels.
b) If V={2}, show 4 and 8 connected regions of the sub-image shown in Fig.1(a).
c) For V={1} and V={2}, Determine whether S2 in Fig.2(b) is 4 and 8 connected regions
or not. Also find out whether S1 and S2 are 4and 8 adjacent or not
[3+2+3]
Q.2. Consider the image shown in Fig.2. Suppose the given image is shrunk 2 times in x and y
directions. Compute the intensities at (1, 2) and (3, 1) using bi-cubic interpolation.
[7]
Q.3. Show that the product of cumulative distribution of an input image with maximum intensity
level transform the image into an image with uniform probability density.
[4]
Q.4. Design a transformation function T(r) using Histogram Matching to transform the image
shown in Fig.3(a) to the image shown in Fig.3(b). If T(r) is the transformation function
then r takes the values from Fig.3(a).
[6]
Q.5. In power law transformation what are the ranges of γ for the visual enhancements in the
dark and hazy images? How power law is used in improving the visual quality of the
analog display?
[5]