B.E/B.Tech Degree Examination, November/December 2008
Electronics and Communication Engineering
080290042 Digital image processing
Regulation 2008
Part A
1. Define 4 and 8 neighbours of a pixels
2. What are separable image transforms?
3. Define histogram
4. Name the different types of derivatives filters
5. Define averaging filters
6. Give the difference between enhancement and restoration
7. Define compression ratio
8. What are the basic steps in JPEG?
9. Whow that the average value of the laplacian operator is zero
10. Define the chain code derivative in 4 and 8 connectivity
Part B
11.a. explain discrete cosine transform and its properities
Or
(b)explain in detail how the continuous image can be converted into digital image using suitable technique
12 (a)explain histogram and give its equalization
Or
(b)discuss in detail the homomorphic and derivative filters
13(a)(i)explain mean filter in detail
(ii)explain the operation of inverse filtering
Or
(b)explain adaptive filter and also what are the two levels of adaptive median filtering algorithms.
14(a)explain with block diagram the lossless precitive coding
Or
(b) explain with block diagram the lossy precitive coding with delta modulation technique
15(a)illustrate with suitable examples how are gradient operators used for detection of edges in medical images
Or
(b)show that how hough transforms can be used to link edges