0
1.4kviews
Image Processing : Question Paper May 2013 - Information Technology (Semester 7) | Mumbai University (MU)
0
0views

## 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]

 Gray level : 0 1 2 3 4 5 6 7 No. of pixel : 100 90 85 70 0 0 0 0
(10 marks) 3 (b) Explain segmentation based on threasholding in detail.(10 marks) 4 (a) Explain various frequency domain low pass filters in detail.(10 marks) 4 (b) Obtain linear convolution of 2 signals given as -
x(n)=u(n)
h(n)=anu(n), a<i.< a="">

</i.<></span>(10 marks)
5 (a) Give in detail classification of signals.(10 marks) 5 (b) For the given 3 bit, 4x4 size image perform the following operations-
(i) threasholding, (T=4)
(ii) intensity level slicing with background for r1=2, r2=5
Bit plane slicing for LSB and MSB planes
Negation
 4 2 3 0 1 3 5 7 5 3 2 1 2 4 6 7
(10 marks)
6 (a) What is Morphology? Name and explain basic operations in morphology.(10 marks) 6 (b) Find the Arithmatic codeword of message India. Calculate the pecentage of compression and bit/pixel of the compression message.(10 marks)

### Write short notes on (any four)

7 (a) Lossy Vs Lossless compression techniques(5 marks) 7 (b) Walsh transform(5 marks) 7 (c) Discrete time system(5 marks) 7 (d) Sampling and Quantization(5 marks) 7 (e) Digital watermaking.(5 marks)