Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Justify / Contradict : Quality of picture depends on number of pixels and gray levels that represents the picture.
5 M
1 (b) What is K-L transform? Why it is called as method of principle components?
5 M
1 (c) Explain log transformation method of data compression indicating clearly whether they are lossy or lossless. Also state the type of redundancy they can minimize:
i) Huffman coding
Transform coding
iii) Adaptive Delta Modulation
iv) Differential Pulse code Modulation
v) Run length coding on bit planes.
5 M

2 (a) Explain the method of segmentation of image by region splitting and merging.
10 M
2 (b) Draw and explain a model of the image degradation/restoration process.
10 M

3 (a) State and explain the properties of 2-D Fourier transform. (Any five)
10 M
3 (b) Explain with block diagram basic steps for filtering in frequency domain
10 M

4 (a) Generate Huffman code for following table in which eight symbol with corresponding probabilities are given :
Symbol A0 A1 A2 A3 A4 A5 A6 A7
Probability 0.05 0.008 0.022 0.06 0.18 0.13 0.07 0.48
10 M
4 (b) Obtain Hadamard matrix H(8) from simple second order matrix 8(2) and draw flow diagram for H(8). Define frequency and find it for H(8).
10 M

5 (a) Histogram of a digital image with eight quantization level is shown below. Perform histogram equalization.
Gray Level R 0 1 2 3 4 5 6 7
No. of gray level hr 220 140 50 60 70 170 130 160
10 M
5 (b) Explain principal techniques to estimate the degradation function for use in image restoration.
10 M

6 (a) Explain the following techniques:-
(i) Arithmetic coding
(ii) Bit Plane Coding
10 M
6 (b) For the 3bit 4X4 size image , perform the following operations:
ii) Threshold with T=4
iii) Intensity level slicing with background r1=2 and r2=5
iv) Bit plane slicing for MSB and LSB planes.
v) Clipping with r1=2 and r2=5
1 2 3 0
2 4 6 7
5 2 4 3
3 2 6 1
10 M

Write short note (any two)
7 (a) Connectivity of pixels
10 M
7 (b) 2 D-DCT computation by row and column passes with 1D-DCT algorithm
10 M
7 (c) Wiener filtering
10 M

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