No. of Pages:2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SECOND SEMESTER M. TECH DEGREE EXAMINATION, APRIL/MAY 201 8

Branch: Electronics and Communication
Stream(s) : Signal Processing

OIEC6304 : DIGITAL IMAGE PROCESSING

MAX MARKS: 60 DURATION: 3hrs

Answer any two full questions from each part

Limit answers to the required points.
PART A
1.0 ) A continuous image f(x,y) = 2, is idealiy sampled at Ax = Ay = 0.25 and the samples are passed

1
through an ideal LPF with frequency response, (1.42) 15 -45 ೬162) 54

= O otherwise
Find the reconstructed image. (6)
(ii} Compute the 2D DFT of a 4x4 gray scale image given below. (3)
1 1 1 1
1 1 4 1
1 1 1 1
ta പി. 4.
2. (10018111 the spatial domain filtering in image enhancement. (6)
(ii)Formutate the Haar Transform matrix for N —4. (3)
५ -
32) (5)

3. 1) Compute the K-L Transform of the Image segment x(m,n) -1
(ii) Perform Histogram equalization on the 3bit image shown below and obtain the histogram

equalized image. {4)

3 4444
X(m,n)=13 4 5
3 43
4 5 55
3
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