MM 7152 DIGITAL IMAGE PROCESSING AND PATTERN RECOGNITION

M.E. / M.TEch. DEGREE EXAMINATION

FIRST ASSESSMENT TEST

PART - A  (5 X 2 = 10 Marks)

1. How many pixels would be there in a 128 X 128 grey scale image? How much time it takes to transmit this image using a 256 Kbps modem.

2.  List out two image applications in visible light and microwave region of a EM wave spectrum.

3.  What is a spatial convolution and correlation? What is the convolution and correlation of an one dimensional    image [ 1 3 5] with mask [1 1].

4.  What is a basis image? What is an mathematical transform and list out its advantages?

5.  List out the differences between image enhancement  and image restoration?

                                                                                     PART - B

Answer any Two Questions ( 2 X 5 = 10 Marks)

1. What is DFT of the sequence { 1, 3, 3, 1}. Verify whether inverse Fourier transform works.

2. List out the stages of a image processing application with a neat diagram. List out the important points of every stage.

3.  Consider the following 8 X 8 image frequency distribution and apply histogram equalization and specification.

Intensity	0	1	2	3	4	5	6	7
Pixels	2	2	8	8	10	10	12	12

The target histogram should be like

Intensity	0	1	2	3	4	5	6	7
Pixels	0	0	10	10	10	20	10	4

Plot the histograms.