Question Paper: Computer Graphics : Question Paper Dec 2014 - Computer Engineering (Semester 6) | Gujarat Technological University (GTU)
0

Computer Graphics - Dec 2014

Computer Engineering (Semester 6)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) Explain scan line fill algorithm. What is the use of edge table and active edge list?(7 marks) 1 (b) 1. Explain shadow mask method.
2. How long it would take to load a 640 × 400 frame buffer with 12 bits per pixel, If 106 bits can be transferred per second?
Define aspect ratio. If image of size 1024 × 800 needs to resize to one that has 640 pixels width with the same aspect ratio, what would be the height of the resized image?
(7 marks)
2 (a) What is aliasing? Briefly explain anti-aliasing techniques.(7 marks) 2 (b) Give advantages and disadvantages of DDA algorithm. Draw a line from (20,10) to (30,18) using DDA algorithm.(7 marks) 2 (c) (i) Explain trigonometric method for circle generation.(3 marks) 2 (c) (ii) Discuss midpoint circle algorithm with example.(4 marks) 3 (a) (i) Write 2×2 transformation matrix for each of the following rotation about origin
(a).Counter clock wise rotation by 180° (b) Clock wise rotation by 90°.
(7 marks)
3 (a) (ii) Explain DVST.(3 marks) 3 (b) Clip the line using Liang-Barsky algorithm against window with (xwmin, ywmin )= (0,0) and (xwmax , ywmax )=(100,50). Line end points are A(10,10) and B(110, 40).(7 marks) 3 (c) Perform 45° rotation of a triangle A(0, 0), B(1, 1) and C(5, 2). Find transformed coordinates after rotation, (a). About origin, (b) About P(-1, -1)(7 marks) 3 (d) Write the Sutherland-Hodgeman polygon clipping algorithm. Using it clip the given polygon against the clipping window (7 marks) 4 (a) What is Bezier Curve? Define properties of Bezier Curve.(7 marks) 4 (b) What is Parallel Projection? Explain in details types of Parallel Projection.(7 marks) 4 (c) What is window and view-port? Retrieve equation for the scaling factor to map the window to view-port in 2D viewing system.(7 marks) 4 (d) Write a Short note on:
1. 3D Rotation
2. 3D Translation
(7 marks)
5 (a) (i) Define: Complementary Colours, Saturation, Luminance.(3 marks) 5 (a) (ii) Explain various light sources.(4 marks) 5 (b) Explain CIE diagram with its usefulness.(7 marks) 5 (c) Explain Z buffer algorithm for hidden surface removal.(7 marks) 5 (d) Explain RGB and CMY colour models. How conversion from RGB to CMY is Done?(7 marks)

ADD COMMENTlink
written 23 months ago by gravatar for Team Ques10 Team Ques10410
Please log in to add an answer.