Computer Graphics Week 6 NPTEL Assignment Answers 2025
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✅ Subject: Computer Graphics
📅 Week: 6
🎯 Session: NPTEL 2025 July-October
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NPTEL Computer Graphics Week 6 Assignment Answers 2025
1. Cohen-Sutherland algorithm is used for
a. point clipping
b. line clipping
c. fill-area clipping
d. all of the above
Answer : See Answers
2. Match the following.
I. Line A. Sutherland-Hodgeman algorithm
II. Convex fill-area B.Cohen-Sutherland algorithm
III.Convex and concave fill-area C. Weiler-Atherton Algorithm
a. I-A, II-B, III-C
b. I-B, II-A, III-C
c. I-C, II-B, III-A
d. I-A, II-C, III-B
Answer :
3. HSR is a computationally intensive process – one way to reduce computation is use of coherence properties. There are several types of coherences. Which among the following is not a coherence-type?
a. Object coherence
b. Face coherence
c. Edge-line coherence
d. Scan-line coherence
e. Depth coherence
Answer :
4. ‘Back Face Elimination’ is required for __________________________.
a. hidden surface removal.
b. fill-area clipping
c. both for hidden surface removal and fill-area calculation
d. none of the above
Answer :
5. Depth Sorting (Painter’s) algorithm works at
a. image space
b. object space
c. both image and object spaces
d. neither image space not object space
Answer :
6. Process of discarding objects is
a. clamping
b. clipping
c. popping
d. pushing
Answer : See Answers
7. 2D clipping algorithms cannot be extended to be used in 3D clipping.
a. True
b. False
Answer :
8. Clipping algorithms are used to remove hidden surfaces.
a. True
b. False
Answer :
9. HSR method broadly of TWO types: object space method and ___________ space method
a. unhidden
b. plane
c. hidden
d. image
Answer :
10. Warnock’s Algorithm is a ________________ method.
- a. clipping
- b. area subdivision
Answer : See Answers
