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Max. Marks: 100

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APJ ABDUL ६410300 സ്ഥ UNIVERSITY

Sixth Semester B.Tech Degree Regular and Supplementary Examination July 2021

Course Code: EC370
Course Name: DIGITAL IMAGE PROCESSING

PARTA
Answer any two full questions, each carries 15 marks

Explain different types of connectivity. Illustrate with examples.
‘Perceived brightness is not a simple function of the intensity of the region’ —
Explain the phenomena behind this.

Perform linear convolution of the following two matrices using matrix

1 2 3
multiplication method. x[m,n] = ( 5 1 and h[m,n]=[3 4 5]
7 8 9

State and explain 2D sampling theorem. Show that the spectrum of a sampled
image is a scaled and shifted repetition of spectrum of original image with
constant spacing along x axis and y axis.
State and prove the spatial shift property and convolution property of 2D-DFT.
Give the draw backs and applications of KL transform.
With the help of a diagram, explain HSI colour model.
Define 2-D Discrete Cosine Transform (2-D DCT). Why we use 2D-DCT
exxtensively in Image processing?
PART B

Answer any two full questions, each carries 15 marks

Can two different images have the same histogram? Justify your answer.

Using equations, explain how low pass and high pass filtering is done in the
frequency domain.
Distinguish between constrained and un-constrained image restoration

techniques.

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Duration: 3 Hours

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