Code No.410408 IV /IV B.Tech. I-Semester Examination November 2002

Set No.

1

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DIGITAL IMAGE PROCESSING (Common to Electronics Communication Engineering, Bio-medical Engineering, Electronic Telematics) Time: 3 hours Max Marks: 80 Answer any FIVE questions All questions carry equal Marks ---

Explain in detail about patterns and pattern classes with examples. Also, explain how these are useful for recognition.

2

Explain how minimum distance classification is useful for classifying different pattern classes.

3 a)

With the help of a block diagram explain the different stages of image processing and analysis schemes along with the information flow from each block Define one-dimensional Fourier Transform pair. Prove that imaginary part of Fourier transform of even function is zero.

4 a) b) 5 a) b)

Explain the concept of image enhancement with the help of low pass filtering technique Explain the seperability and translation properties of Fourier transform

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What is meant by image segmentation? Mention the applications of image segmentation? Explain about detection of discontinuities Write about the Huffman Coding. What do you mean by mapper in source encoder? Compare the statistical Compression and spatial Compression.

7.

Derive the Bayes decision function for M=2, and also derive the Likelihood Ratio?

8.

Discuss Robbins-Monro Algorithm? What are the steps taken to increase the speed of convergence of the algorithm?

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6 a) b) c)

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Code No.410408 IV /IV B.Tech. I-Semester Examination November 2002

Set No.

2

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DIGITAL IMAGE PROCESSING (Common to Electronics Communication Engineering, Bio-medical Engineering, Electronic Telematics) Time: 3 hours Max Marks: 80 Answer any FIVE questions All questions carry equal Marks --What a neat block diagram, explain a pattern recognition system in detail.

2 a) b)

Write a short note on classification principles. Distinguish linear and minimum distance classifier in detail.

3 a)

With the help of diagram explain the different components of image processing system. Mention some of the application of image processing. Suppose the sequence [2 3 2 1] represents a discrete function. Compute discrete Fourier transform of the function.

b)

4 a) b)

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Prove the following properties of one-dimensional Fourier transform i. Shift invariance ii. Convolution State and prove Parseval’s theorem.

Briefly explain about point detection, line detection and edge detection Give the structure of the mask used for detection of isolated points and lines, different from a constant background.

6 a) b)

Mention the different types of Coding used in Error free Compression. Explain three types of Coding in Error free Compression.

7.a) b)

With a neat diagram explain the Perceptron Approach of pattern classification? State and explain Reward-Punishment Algorithm?

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5 a) b)

Define and explain any four types of grammars ? What are the rules of JUXTAPOSITON in PDL?

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8.a) b)

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Code No.410408 IV /IV B.Tech. I-Semester Examination November 2002

Set No.

3

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DIGITAL IMAGE PROCESSING (Common to Electronics Communication Engineering, Bio-medical Engineering, Electronic Telematics) Time: 3 hours Max Marks: 80 Answer any FIVE questions All questions carry equal Marks --What are the various functional blocks, present in a pattern recognition system? Explain each block in detail.

2 a) b)

What do you understand by classifier learning? Explain two different classification strategies in detail.

3 a)

Define inverse discrete Fourier transform and mention some properties of Fourier transform. What are the properties of the distance function? Define Euclidean distance, city block distance and chessboard distance.

b)

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Explain the periodicity, conjugate and rotation properties of Fourier transform Why image enhancement is required in image processing system. Explain the different categories of image enhancement techniques.

5 a) b) c)

Write notes on gradient operator and laplacian. Which mask is used to compute the laplacian? Mention the applications of laplacian?

6

What are the types of compression used in Image applications? Mention the requirements of compression. Briefly explain.

7.a) b)

Explain LMSE algorithm for statistical approach of pattern classifier? What is criterion function for Increment-correction algorithm and explain the algorithm?

8.a)

Contrast between fixed increment, absolute – correction and fractional-correction algorithms. State and explain LMSE Algorithms.

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4 a) b)

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Code No.410408 IV /IV B.Tech. I-Semester Examination November 2002

Set No.

4

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DIGITAL IMAGE PROCESSING (Common to Electronics Communication Engineering, Bio-medical Engineering, Electronic Telematics) Time: 3 hours Max Marks: 80 Answer any FIVE questions All questions carry equal Marks --Explain in detail about the fundamental problems in the design of pattern recognition system. Also, discuss the methods to overcome them.

2 a) b)

Write a short note on cluster analysis. Explain a cluster-seeking algorithm in detail.

3 a)

Explain the meaning of histogram equalization. Give an example where histogram equalization technique compresses the discrete gray level range of an image. Show that crispened image can be obtained by convolving it with the mask.

b)

-1 5 -1

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Explain the convolution and correlation properties of Fourier transform Explain the concept of Fast Fourier transform. Show its time complexity with respect to Fourier transform.

5 a) b) c)

Write notes on zero crossings Briefly explain about stochastic gradients. Write notes on performance of edge detection operators.

6 a) b)

With neat definitions and equations, explain about spatial feature extraction. Write short notes on features of transform.

7.a) b)

Briefly discuss about multicategory classification? Describe the general gradient descent algorithm?

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4 a) b)

Contd…2.

Discuss briefly the syntax-directed recognition? Consider the grammar G= (VN, VI, P,S) VN = { S,A1, A2, A3, A4,A5 } VT = { a , b, c, d} P: S d+A1 A1  c+A2 A2  d*A3 A3  a+A4 A4  b*A5 A5  c

Set No.4.

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8.a) b)

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Code No.410408

Where (~d) indicate the primitive d with its direction reversed. List out the different steps in the construction of a PDL structure.

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Code No.410408 IV /IV B.Tech. I-Semester Examination November ...

b) Explain the seperability and translation properties of Fourier transform ... 3 a) Define inverse discrete Fourier transform and mention some properties of ...

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