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Image Processing : Question Paper May 2014 - Information Technology (Semester 7) | Mumbai University (MU)

## Image Processing - May 2014

### Information Technology (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.

1 (a) Unit step sequence is power signal.(4 marks) 1 (b) Every image has unique histogram.(4 marks) 1 (c) Extreme contrast stretching is thresholding.(4 marks) 1 (d) All image compression techniques are invertible.(4 marks) 1 (e) Laplace is not a good edge detector.(4 marks) 2 (a) What is descrete time system? Give classification of system based on properties of system(10 marks) 2 (b) If x(n)={2,-1,3,0,4}, find-
(i) x(-n)
(ii) x(-n+2)
(iii) x(n-1)
(iv) x(2n)
(v) x(n+1)
(10 marks)
3 (a) State and prove any four properties of DFT.(10 marks) 3 (b) Find linear convolution of the signals -
(i) x(n)={2,3,0,1} and h(n)={1,0,-1,2}
(ii) x(n)={1,2,3,4,5,6,7} and h(n)={1,0,2}
(10 marks)
4 (a) What is Morphology? Name and explain basic operations in Morphology?(10 marks) 4 (b) For the given histogram state and prove what happens when equalized twice

 Grey Level : 0 1 2 3 nk : 70 20 7 3
(10 marks) 5 (a) Explain in detail image enhancement in spatial domain.(10 marks) 5 (b) Explain region based segmentation in detail.(10 marks) 6 (a) Give Huffman code for the following symbols
 Symbol : 0 1 2 3 4 5 6 7 Probability : 0.05 0.008 0.002 0.06 0.18 0.13 0.07 0.48
(10 marks)
6 (b) What is wavelet transform? Explain in detail.(10 marks)

### Write short note on any four.

7 (a) Homomorphic filter(5 marks) 7 (b) Lossy compression(5 marks) 7 (c) DCT(5 marks) 7 (d) CBIR(5 marks) 7 (e) Copyright marking.(5 marks)

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