Digital Image Processing : Question Paper Dec 2016 - Electronics Engineering (Semester 7)

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Digital Image Processing - Dec 2016

Electronics 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.

Solve any four Q1 (a,b,c,d,e)

1(a) Justify the statement "Quality of picture depends on the no: of pixels and the no: of gray level representing the pictures".(5 marks) 1(b) Explain RGB color model to represent a digital image.(5 marks) 1(c) Can two different images have the same histogram? Justify your answer.(5 marks) 1(d) Define chain codes in 4-connectivity and 8-connectivity.(5 marks) 1(e) Compare arithmetic coding and Huffinan coding.(5 marks) 2(a) Apply the following Image Enhancement techniques for the given 3 bits per pixel image segment.$ 1=\begin{bmatrix} 2 & 1 & 2& 1& 0\\\\ 7 & 1 & 4& 3& 2\\\\ 2& 4& 1& 3& 7\\\\ 1& 3& 4& 6& 3\\\\ 1& 4& 1& 3& 4 \end{bmatrix} $/
i) Digital Negative
ii) Bit plane Slicing
iii) Thresholding with T=5(10 marks) 2(b) Perform histogram equalization and plot the histograms before and afte equalization.

Gray level	0	1	2	3	4	5	6	7
No.of pixel	128	75	280	416	635	1058	820	684

(10 marks) 2(b) Explain various image enhancement techniques in frequency domain.(10 marks) 3(a) Givethe 7×7 Image segment,perform diation using the structuring element shown: Structuring element:

1	0
0	1

0	0	0	0	0
1	0	1	0	1
1	0	1	0	1
1	0	1	0	1
1	1	1	1	1
0	0	1	0	0
0	0	1	0	0

(10 marks) 3(b) Explain image segmentation based on similarity with help of examples.(10 marks) 4(a) A source emits 6 symbols with the following probabilities. Construct the Huffman code and calculate the average code word length and coding efficiency.

Symbol	A	B	C	D	E	F
Probability	0.2	0.3	0.06	0.15	0.04	0.25

(10 marks) 4(b) Explain with block diagram the transform based coding.(10 marks) 5(a) Check whether the DFT matrix is unitary or not and calcuate the 2D-DFT of the given image segment using matrix multiplication method $$f(x,y)=\begin{matrix} 0 & 0& 0 & 1\\ 1 & 2& 0& 0\\ 1 & 0& 1& 1\\ 2& 0& 2& 0 \end{matrix}$$(10 marks)

write a short note any two Q6.(a,b,c,d)

6(a) Hit or Miss Transformation(10 marks) 6(b) Discrete Wavelet Transform(10 marks) 6(c) Thresholding techniques(10 marks) 6(d) Image file format(10 marks)

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