Download GTU BE/B.Tech 2018 Winter 6th Sem New 2160703 Computer Graphics Question Paper

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Subject Code: 2160703

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018

Subject Name: Computer Graphics

Time: 02:30 PM TO 05:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. (a) List applications of Computer Graphics. [03]
2. (b) Explain beam penetration technique for color display. [04]
3. (c) Derive all equations for Bresenham’s line drawing algorithm. Show all the necessary calculations for all the intermediate points for a line having endpoints as (1, 3) & (7, 9) using Bresenham’s line drawing algorithm. [07]

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4. (a) Consider three different raster systems with resolutions of 640 x 480, 1280 x 1024 and 2560 x 2048. What size of frame buffer is needed for each of these systems to store 12 bits per pixel? [03]
5. (b) Explain DVST in brief. [04]
6. (c) Explain the property of circle and calculate the pixel position along circle path with radius r =10 centered on the origin using midpoint circle algorithm up to X=Y. [07]
   OR
   Apply the shearing transformation to Square with A(0,0), B(1,0), C(1,1) and D(0,1) as given below:
   1. Shear parameter value of 0.5 relative to line Yref=-1

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   2. Shear parameter value of 0.5 relative to line Xref = -1
7. (a) What is convex hull? Explain its use in boundary representation. [03]
8. (b) Explain what are inside — outside tests. [04]
9. (c) What is aliasing? How to compensate the aliasing? Explain in detail. [07]
   

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   OR
   Explain following terms :
   1. Aspect ratio
   2. Cubic spline
   3. Window port

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10. (a) Write a note on concave polygon and its splitting. [03]
11. (b) Explain three methods of character generation. [04]
12. (c) State the differences between 4 — Connected fill and 8 — Connected fill. [07]
13. (a) Explain reflection in 2D transformations. [03]
14. (b) Explain NLN clipping algorithm. [04]

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15. (c)
    OR
    Differentiate the parallel and perspective transformation. [07]
16. (a) Explain rotation in 2D transformations. [03]
17. (b) Explain and write Liang Bersky line clipping algorithm. [04]

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18. (c) Explain RGB color model. [07]
19. (a) Explain the term hue and saturation. [03]
20. (b) List advantages of B-spline over Bazier splines. Explain B-spline curves. [04]
21. (c)
    OR
    

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    Explain HSV color model. [07]
22. (a) Explain following terms :
    1. Dominant Frequency
    2. Purity
    3. Luminance
    4. Frame buffer

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    [03]
23. (b) Explain Z-buffer algorithm. [04]

Date: 04/12/2018

Total Marks: 70

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