Question Paper: Digital Image Processing Question Paper - Dec 17 - Electronics Engineering (Semester 7) - Mumbai University (MU)
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## Digital Image Processing - Dec 17

### Electronics Engineering (Semester 7)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Q1) Answer any four of the following:

1(a) Differentiate between 8 connectivity and m connectivity
(5 marks) 00

1(b) Explain Dilation and Erosion in brief.
(5 marks) 00

1(c) Justify, "Huffman coding is lossless compression technique"
(5 marks) 00

1(d) Justify, "Butterworth low pass filter is preferred to ideal low pass filter"
(5 marks) 00

1(e) Explain the importance of Isopreference curves.
(5 marks) 00

2(a) Define Image Enhancement. Explain the following enhancement operations and draw the graphs of transformation function:

1. Dynamic range compression
2. Gray level slicing
(10 marks) 00

2(b) The grey level distribution of an image is shown in table below. Perform Histogram equalization and plot histograms of original and equalized Images. Explain need of histogram equalization.

Gray Level 0 1 2 3 4 5 6 7
Frequency of occurence 100 250 100 300 150 0 0 0

(10 marks) 00

3(a) Explain the method of edge linking using Hough transform.
(10 marks) 00

3(b) What is image segmentation? Explain with example segmentation based on similarities.
(10 marks) 00

4(a) Explain Discrete Wavelet Transform and its application in image processing.
(10 marks) 00

4(b) Apply DET algorithm to the rows and columns of the image segment shown and obtain 2D DFT. Show the Butterfly diagram.

6 1 3 2
1 3 2 3
1 6 4 1
1 2 1 1

(10 marks) 00

5(a) Consider an 8 pixel line of grey scale data {10, 11, 15, 13, 15, 57, 54, 51} which has been uniformly quantized with 6 bit accuracy. Construct its 3 bit IGS code. Compute the rms error for the decoded IGS code.
(10 marks) 00

5(b) What are different types of data redundancies found in a digital image? Explain in detail.
(10 marks) 00

Q6) Write short notes on: (any three)

6(a) Hit or Miss transformation
(7 marks) 00

6(b) Chain codes
(7 marks) 00

6(c) Image Sampling and Quantization
(7 marks) 00

6(d) Homomorphic filtering
(7 marks) 00