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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), MAY 2019

Course Code: EC370
Course Name: Digital Image Processing

PARTA

Answer any two full questions, each carries 15 marks
With a neat diagram explain the working of a Vidicon camera tube.
Explain the terms (1) Mach-band effect, (ii) Saturation (iii) 8 - adjacency
List the properties of distance functions.
Write the recursive definition of a Hadamard Transform. Using this definition
construct a 4 x 4 Hadamard matrix.
Bring out the structural difference between circulant and Toeplitz matrices. Write
an example for each.
What is Singular value decomposition? Explain how each factor in SVD can be
found out?
State and prove the 2-D Sampling theorem.
Write the Forward and inverse transformation kernels for 2D-DFT. Are these
kernels separable? Justify your answer.

Suppose the eigen vectors of covariance matrix of the 2-dimensional data are

1/\/2 12
€] = / and ദു = / respectively. If the mean vector of data is
12 —1/V2

zero, find the KL transform of the data point x = ۴ )

۲۸۱۲۰٢ छ
Answer any two full questions, each carries 15 marks

List and describe any two point processing operations with necessary graphs.
Consider the following image of size 5x5. It has gray level values from 0-7.

Perform the histogram equalization of the image and obtain the final image.

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Duration: 3 Hours

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