Rajasthan Technical University 2009 B.Tech Computer Science and Engineering Computer Graphics - 5E3162 - Question Paper

B.Tech. Vth Semester(Main/Back) exam - 2009
COMPUTER ENGINEERING
COMPUTER GRAPHICS
5E3162



Unit -1

1 a) what is frame buffer?Calculate size of frame buffer for a display device(CRT) supporting actual colors and has 1024 * 1024 pixels on the screen, if size of screen is 9"*12", compute resolution and aspect ratio also. (marks 10)

b) discuss how colors are generated on the screen (mark 6)

OR

a) a TV screen has 525 scan lines and an aspect ratio of 3:4. if every pixel contains 12 bits words of intensity information, how many bits per 2nd are needed to 30 frames every second. [marks 10]

b) discuss followings:- [marks 6]
i) Refreshing
ii) Working principle of keyboards
iii) rubber band techniques.

Unit -II

2 a) Consider the line from (1,1) to (4,6). Use bresenham,s line drawing algorithm to rasterize this line and provide output pixels. [marks 8]

b) discuss parametric function. explain properties of Bezier curves. [marks 8]

OR

A) provide the advantages and disadvantages of the DDA and Brensanham's algorithm.Explain mid point circle algorithm. [marks 8]

b) Differentiate B-splines with Bezier curves. Briefly define B-Spline curves. [marks 8]


Unit III

3 a) Show rotation of a 2D box represented by (5,5)to (10,15)w.r.t (5,5) by 90 in anticlockwise direction. [marks 9]

b) define various kinds of parallel projections used in computer graphics. [marks 7]


OR

a) Prove that the multiplication of transformation matrices for every of the subsequent sequence of operations is commutative. [marks 10]
i) 2 successive rotations.
ii) 2 successive scaling.

b) discuss perspective projection. [marks 6]


Unit IV

4 a) discuss cohen-Sutherland line clipping algorithm. [marks 8]

b) discuss Gourand shading and compare it with phons shading. [marks 8]

OR

a) discuss Sutherland-Hodgeman polygon clipping algorithm. [marks 8]
b) discuss Depth-Buffer method for visible surface detection [marks 8]



Unit V

5 a) discuss multimedia hardware with example. [marks 8]

b) Compare and contrast different file formats. [marks 8]

OR

a) discuss followings [marks 8]
i) SCSI
ii) MIDI

b) discuss authority tools and presentation tools with example. [marks 8]

Earning:   Approval pending.