computer graphics

Topics: Color space, RGB color model, Cathode ray tube Pages: 1 (315 words) Published: October 14, 2014
Seat No.: ________

Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY
B. E. - SEMESTER – VI • EXAMINATION – WINTER 2012

Subject code: 160703
Subject Name: Computer Graphics
Time: 02.30 pm - 05.00 pm

Date: 04/01/2013
Total Marks: 70

Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

(a) Explain DDA line drawing algorithm. What are the limitations of DDA line 07 drawing algorithm?
(b) Explain the working of Cathode Ray Tube with a diagram.
07

Q.2

(a) Explain Direct-View Storage Tubes (DVST). How persistence characteristic 07 of phosphor affect on refresh rate of system?
(b) Explain Odd-Even Rule and Non Zero Winding Rules.
07
OR
(b) Explain the Bresenham’s algorithm to draw line for any kind of slope. 07

Q.3

(a) Explain shadow mask technique and explain how does it differ from beam penetration technique?
(b) Derive transformation matrix for 2D rotation.
OR
(a) Write and explain the midpoint circle generation algorithm. (b) Explain the parallel and perspective projection techniques to project 3D object onto 2D view plane.

Q.3

07
07
07
07

Q.4

(a) Explain the Cohen Sutherland line clipping algorithm.
07
(b) What is window and view-port? Retrieve equations for the scaling factors to 07 map the window to view-port in 2D viewing system.

Q.4

(a) Explain the Bazier curves and surfaces.
(b) Explain the Nicholl-Lee-Nicholl (NLN) line clipping algorithm.

07
07

Q.5

(a) What is depth buffer method? Write and explain the steps of a depth buffer algorithm.
(b) Explain following color model:
1) YIQ color model.
2) RGB Color model.
OR
(a) Classify the visible surface detection algorithms and explain one of the image-space based algorithm.
(b) Explain following color model:
1) XYZ color model.
2) CMY Color model.

07

OR

Q.5

*************

1/1

07

07
07

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