Download DU (University of Delhi) B-Tech (Bachelor of Technology) 5th Semester 6193 Computer Graphics Question Paper
Sl. No. of Ques. Paper : 6193 F-S
Unique Paper Code : 2341503
Name of Paper : Computer Graphics
Name of Course : B.Tech. Computer Science
Semester : V
Duration : : 3 hours
Maximum Marks : 75
(Write yourRoll No. on the top immediately on receipt of this question paper.)
The question paper consists of two Sections. Section A is compulsory.
Attempt any four questions from Section B.
SECTION A
1. (a) Consider a raster system with a resolution of 250X250. For a lOXIl screen,
find the radius of each pixel. 3
(b) What is interlacing? 2
2. (a) Differentiate between DDA and Bresenham Line Drawing algorithm. 3
(b) Discuss any two methods to draw a thick primitive. 2
3. (a) Give the structure of Global Edge table used in Polygon filling algorithm. 2
(b) Prove that two successive scaling operations are commutative. 3
4. (a) Show that the following 2d matrix represents a pure rotation: .3
1?t2 2:2
Ht2 1 +t2
-2t 1?:2
1+1?2 1+t2
(b) What is the value of Center of Projection w.r.t. parallel and perspective
projection? 2
5. (a) Give the 3D rotation matrices for rotation by a, ,8 and y about X?axis, Y-axis
and Z-axis respectively. 3
(b) Why is depth sort algorithm also known as Painter?s algorithm? 2
P. T. O.
6193
6. (a)
(b)
7. (a)
(b)
8. (a)
(b)
9 (.3)
(b)
10. (a)
(b)
11. (a)
What are the properties of Bezier curve? 2
What do you mean by ambient re?ection and diffuse re?ection? 3
What is the difference between Y in CMY and Y in YIQ color models
respectively? 2
How does the frame spacing control the motion simulated in an animation
scene? 3
SECTION B
Indicate raster positions that would be chosen while scan converting region 1
of an ellipse with major axis as 8 and minor axis as 5. The ellipse is centered
at origin. 6
Brie?y explain the working of Liquid Crystal Display. ? 4
Use the Cohen Sutherland algorithm to clip line P1 (70, 20) and P2 (100, 10)
against a window lower left hand corner (50, 10) and upper right hand corner
(80,40). 6
Consider the polygon with vertices A (2,3), B (8,3), C (8, 6), D (10, 6),E
(10, 9) and F(S, 9). Write steps to fill this polygon using Odd- -Parity rule. 4
The coordinates of square ABCD are A (0, O), B (0, 4), C (4, 4), and D (4, 0).
Scale it to half the size w.r.t. the fixed point that is the center of the square. 5
What are rigid body transformations? Determine the conditions under which
the generalized 2X2 transformation matrix represents a rigid body
transformation. 5
Write the 3D transformation matrices for the following:
(i) Uniform scaling by a factor of 2 w.r.t. the fixed point (1, 1, 2, 1). 3
(ii) Translation right by 2 units and up by 4 units. 2
(iii) Rotate about X-axis by 30? followed by rotation about z-axis by 45? 2
(iv) Two-point perspective pr'ojection on z=0 'plane with Centre of
' Projection (COP) lying on X?axix as 2-0 and COP lying along y-axis as
?1-0. 3
12. (a)
(b)
13. (a)
(b)
(C)
3 6193
Given a sequence of control points p0 (0, 0, 0), pl (1, 2, 0), p3 (3, 1, 0). Write
a formula for the Bezier curve formed from above three points. Use the
formula to calculate the point t = 1/3 and the tanget at that point. 5
Define morphing. Specify the rules to equalize the set of edges in key frames
K and K + 1. 5
Differentiate between halftoning and dithering. 4
List the data structures used in Z-buffer algorithm for visible surface
determination, along with the description of the values stored in them. 3
Brie?y explain the Gourand shading model. 3
400
This post was last modified on 31 January 2020