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2003 Course Digital Image Processing

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Total No. of Questions : 12] P1074 [Total No. of Pages : 3 [3864]-257 B.E. (Electronics ) DIGITAL IMAGE PROCESSING (2003 Course) (404212) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer Q1or Q2, Q3or Q4, Q5 or Q6, Q7 or Q8, Q9 or Q10, Q11or Q12. 2) Answers to the two sections should be written in separate answer books. 3) Figures to the right indicate full marks. 4) Neat diagrams must be drawn wherever necessary. 5) Assume suitable data, if necessary. 6) Use of electronic pocket calculator is allowed. SECTION - I Q1) a) b) Explain MTF of visual system. Sketch the typical response curve. [8] Describe any one technique for acquiring image in detail. [8] OR Q2) a) b) Discuss with a neat block diagram the process of converting an analog [10] image to a digital image. What is aliasing? Write a note on pixel connectivity. [6] Q3) a) Write a note on Discrete Fourier Transform for image transformation. [8] b) What is a color model? Explain any one model in detail. Also state its applications. [8] OR Q4) a) Explain Hadamard Transform. Derive Hadamard matrix for N = 4. [8] b) Explain HSI model. Write an algorithm for conversion of HSI model to RGB. [8] P.T.O. Q5) a) b) Describe any 2 point processing techniques for image enhancement.[8] What is histogram? Write the steps for histogram equalization. [10] OR Q6) a) State the techniques to remove salt & pepper noise from an image. Explain any one technique in detail. [8] b) Explain difference between smoothing and sharpening filters. Consider an image and discuss the effects of implementing these filters. [10] SECTION - II Q7) a) b) Q8) a) b) What is redundancy? State and explain the redundancies in an image.[8] Draw and explain image compression model. [8] OR Explain the terms-Lossy compression and Loseless compression. Suggest and explain a compression technique for each in brief. [8] Explain JPEG compression standard. [8] Q9) a) Write a note on dialation and erosion. State applications for both. [8] b) Consider an image and derive the chain codes using 4-connectivity and 8-connectivity. [8] Q10)a) OR A binary image X and a structuring element B are given as below 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 0 0 0 0 B X Perform image opening. b) [8] Compare the performance of first order and second order derivatives w.r.t. an image. Which one would you prefer for detecting edges? Why? [8] [3864]-257 -2- Q11)a) b) Q12)a) b) Explain noise models occuring in an image. [8] Draw a block diagram for a character recognition system. Suggest various algorithms used at each block. [10] OR Explain Weiner filtering for image restoration. [8] Draw a block schematic for a fingerprint recognition system. Suggest suitable image processing algorithms at each stage. [10] rrr [3864]-257 -3-

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