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.

Justify/contradict with reason

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

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)