R.G.P.V. BHOPAL
E.C. 7th Semester EXAMINATION
DIGITAL IMAGE PROCESSING EC-7102
Time: 3Hrs Max Marks: 100 Min Marks: 40Note : Attempt any five questions. All questions carry equal marks.
Q.1.(a) In context to an image, describe the sampling and quantization process. Draw sampled image spectra.?
(b) Describe the image sensing is acquisition process employing a CCD camera.?
Q.2.(a) Discuss the various properties of two dimensional Fourier transform.?
(b) Discuss discrete cosine transform (DCT)and its properties. Discuss how it can be used in transform based image encoding?
Q.3.(a) List different types of noise that may affect an image.Describe how an adaptive mean filter
may be implemented?
(b) What is image histogram? How it is useful in image enhancement? Show mathematically the process improving image quality.?
Q.4.(a) Discuss the properties and transfer function of ideal low pass frequency domain filter.
Compare it with characteristics of Gaussian low pass filter?
(b) How edge is detected in an image ? What are the different methods of it ? Discuss it using different operator and corresponding masks.?
Q.5.(a) What is the use of hough transform is edge-linking problems of images? How hough transform is implemented ? Discuss its characteristics.?
(b) Discuss how a shape may be represented ? List and describe various shape defining parameters Give their mathematical representation.?
Q.6.(a) What is the purpose of image restoration ? What are its different techniques ? What is meant by contained and unconstrained restoration? Give example.?
(b) What advantages Wiener filter has over other filters? What are its characteristics ? How it may be implemented ?
Q.7.(a) What are different classes of image data encoding techniques ? Describe the encoding techniques using differential Pulse code modulation.?
(b) Discuss the following encoding techniques: ?
(i) Run length coding
(ii) Variable length coding employing Huffman coding
Q.8.Write short notes on any three of the following: ?
(i) Walsh transform
(ii) Distance measure and neighbor of a pixel
(iii) Enhancement using averaging
(iv) Block circulant
(v) Erosion and Dilation of image
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