Image Processing - May 2013

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.

Slove any four question :-

1 (a) Show that :- Highpass=original-lowpass.(5 marks) 1 (b) Justify lossy compression is not suitable for compressing executable files.(5 marks) 1 (c) For 8-point DFT the first five DFT coefficients are-
x(k)=x{10, 2+3j, 1+2j, j, 4}
Find the remaining coefficients(5 marks) 1 (d) What is wavelet? Explain wavelet transform in brief (5 marks) 1 (e) Compare and contrast between contrast stretching and threasholding.(5 marks) 2 (a) Perform the following operations on given signal :-
x(n)={1,2,3,4,5,}
(i) x(-n-1)
(ii) x(n-2) (iii) x(n+1)
(iv) x(-n+2)
(v) 2x(n).(10 marks) 2 (b) State and prove any four properties of DFT.(10 marks) 3 (a) Perform histogram stretching so that the new image has a dynamic range of[0,7]