Image Processing : Question Paper Dec 2015 - Computer Engineering (Semester 7)

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Image Processing - Dec 2015

Computer Engineering (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Answer the following.

1 (a) What do you understand by zero memory operation.(5 marks) 1 (b) Discuss different discontinuities in image.(5 marks) 1 (c) What is an Unitary matrix.(5 marks) 1 (d) Define Morphological operations Erosion and Dilation.(5 marks) 2 (a) Discuss colour models for a digital image.(10 marks) 2 (b) For the given 3 bits per pixel, 4×4 size perform following operations
i) Intensity level slicing with background, r₁=3 and r₂=5
Bit plane slicing

6	2	3	2
1	5	0	7
4	3	2	1
2	5	7	6

(10 marks) 3 (a) Explain: The first difference makes the chain code invariant to rotation.(10 marks) 3 (b) Explain Homomorphic filtering with the help of block diagram.(10 marks) 4 (a) Write 8×8 Hadamard transform matrix and its signal flow graph for fast Hadamard transform. Using this butterfly diagram (Signal flow graph) compute Hadamard transform for x(n)={1, 2, 1, 1, 3, 2, 1, 2}.(10 marks) 4 (b) Find the DCT of the given Image using matrix multiplication method. $$ f(x, y) = \begin{bmatrix} 2 &4 &4 &2 \\4 &6 &8 &3 \\2 &8 &10 &4 \\3 &8 &6 &2 \end{bmatrix} $$(10 marks) 5 (a) Discuss the different types of redundancies in images with examples.(10 marks) 5 (b) Construct Improved Gray Scale (IGS) quantization code for given gray scale data, {100, 110, 124, 130, 200, 210}. (10 marks)

Write detail notes on (any two).

6 (a) Edge Linking using Hough transform.(10 marks) 6 (b) Thinning with example.(10 marks) 6 (c) Differential Pulse Code Modulation (DPCM).(10 marks) 6 (d) Segmentation techniques: Region growing and split and merge.(5 marks)

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