Digital Image Processing questions

Description: Total 4 sets of question papers

DIGITAL IMAGE PROCESSING (SET NO. 1)
( Common to Electronics & Communication Engineering and Electronics &
Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. (a) Discuss the structure of Human eye.
(b) What is meant by a digital image? Explain how digital images can be repre-
sented. [6+10]
2. (a) Explain the terms Adjacency, Connectivity, and Boundaries in the aspect of
digital images.
(b) Discuss about Hotelling transform. [8+8]
3. Explain clearly, about Fourier transform and how it is helpful in image processing.
[16]
4. (a) What is meant by image enhancement by point processing? Discuss any two
methods in it.
(b) What is meant by Histogram of an image? Explain about Histogram specifi-
cation? [8+8]
5. (a) Discuss about Ideal low pass filters.
(b) Explain about least mean square filters. [8+8]
6. (a) Discuss about the channel encoder and decoders.
(b) Explain about Error-free compression. [8+8]
7. (a) What is image restoration? Discuss the degradation model.
(b) Discuss clearly the region oriented segmentation. [8+8]
8. Write short notes on the following:
(a) Lossy compression
(b) Constrained least squares
(c) Hadamard transform [6+5+5]


DIGITAL IMAGE PROCESSING (SET NO. 2)
( Common to Electronics & Communication Engineering and Electronics &
Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. (a) Explain about Aliasing and Moire patterns.
(b) Explain the terms Adjacency, Regions and Boundaries. [8+8]
2. (a) Explain the elements of digital image processing system.
(b) Show how the fast Fourier transform can be used to compute the two dimen-
sional discrete Fourier transform efficiently. [8+8]
3. (a) Discuss about the two-dimensional Hadmard transform.
(b) Explain the role of Discrete Cosine transform in image processing. [8+8]
4. (a) What is meant by Histrogram of an image? Explain about Histrogram match-
ing.
(b) Discuss about Image subtraction and Image overaging. [8+8]
5. (a) Discuss about sharpening spatial filters.
(b) Explain a model of the image degradation/restoration process. [8+8]
6. (a) Discuss the global processing via the Hough transform.
(b) Explain the basic global thresholding. [8+8]
7. (a) Discuss about the channel encoder and decoder.
(b) Explain about lossy compression. [8+8]
8. Write short notes on the following:
(a) Fidelity criteria
(b) Edge linking
(c) Colour image processing [ 5+5+6]

DIGITAL IMAGE PROCESSING (SET NO. 3)
( Common to Electronics & Communication Engineering and Electronics &
Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. (a) Discuss the basic concepts in image sampling and quantization.
(b) What is meant by a digital image? Explain how digital images can be repre-
sented? [8+8]
2. (a) What is a Gray level image? Discuss about spatial and gray- level resolution.
(b) Discuss about discrete cosine transform. [8+8]
3. (a) Distinguish between discrete Fourier transforms and Fast Fourier transforms.
(b) Discuss about Hotelling transform, and its role in image processing. [8+8]
4. What is meanty by Histogram of an image. Write and explain with an example an
algorithm for histogram equalization. [16]
5. (a) What is an image filter? Discuss about ideal High pass filters.
(b) Explain about constrained least squares restoration. [8+8]
6. (a) Explain clearly the basic adaptive thresholding.
(b) Discuss cleary about region splitting and merging. [8+8]
7. (a) Explain the Fidelity criteria.
(b) Discuss various image compression models. [6+10]
8. Write short notes on the following:
(a) Lossy compression
(b) Boundary extraction
(c) Imaging geometry [8+8]



DIGITAL IMAGE PROCESSING (SET NO. 4)
( Common to Electronics & Communication Engineering and Electronics &
Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. (a) Distinguish between digital image and binary image.
(b) Discuss about image formation in the eye. [6+10]
2. (a) State and explain various methods of Image acquisition.
(b) Discuss the Hadamard transforms in detail. [8+8]
3. Discuss about the two-dimentional discrete Fourier transform and its inverse. Ex-
plain clearly how it is useful in image processing. [16]
4. (a) Discuss about Image negative and Log transformations.
(b) What is meant by the Gradient and the Laplacian? Discuss their role in image
enhancement. [6+10]
5. (a) Discuss about colour image processing
(b) Discuss about Least Mean Square filters. [8+8]
6. What is meant by discontinuities in a image. State and explain various methods
involved in it. [16]
7. (a) Discuss about Error free encoding.
(b) Discuss about source encoder and decoder. [8+8]
8. Write short notes on the following:
(a) Error-free compression
(b) Edge linking
(c) Imaging geometry. [5+6+5]