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## Image Processing - Dec 2014

### Information Technology (Semester 7)

TOTAL MARKS: 80

TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.

(2) Attempt any **three** from the remaining questions.

(3) Assume data if required.

(4) Figures to the right indicate full marks.
**1 (a)** Define Image enhancement and explain any three Point Processing Techniques.(10 marks)
**1 (b)** Give the classification of discrete time signal with example.(10 marks)
**2 (a)** Perform Histogram Equalization and draw the Histogram for the given grey levels of an image show:

Gray Level |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |

Frequency |
123 | 78 | 281 | 417 | 639 | 1054 | 816 | 688 |

**2 (b)**Give the Classification of Discrete Time System with example.(10 marks)

**3 (a)**List any five properties of 1-D DFT and explain the use of any two properties.(10 marks)

**3 (b)**Explain smoothing and sharpening Filtering with example.(10 marks)

**4 (a)**For the following 4x4 image, determine its forward and inverse transforms and compare the inverse transforms with the digitized image data:

f(x,y) = [2 0 1 0; 1 0 0 1; 1 0 0 1; 2 1 2 1]

Use the following image Transforms:-

i) Hadamard Transform

ii) Discrete Cosine Transform.(12 marks)

**4 (b)**What is morphology? Name and explain the basic four operations of morphology?(8 marks)

**5 (a)**Explain in brief different Lossless digital image compression techniques.(10 marks)

**5 (b)**If x(n)={2, -1, 3, 0, 4};

Find:-

i) x(-n+2)

ii) x(n-1)

iii) x(2n)

iv) x(n+1)(10 marks)

**6 (a)**Explain Hit-or-Miss Transformation.(10 marks)

**6 (b)**Write a note on Hough Transform.(10 marks)

**7 (a)**4-point DIT-FFT(5 marks)

**7 (b)**Vehicle Number plate Detection and recognition(5 marks)

**7 (c)**Chain Code(5 marks)

**7 (d)**Homomorphic filter.(5 marks)