CS602 Midterm Past Paper 2007

MIDTERM EXAMINATION

FALL 2007 CS602 - COMPUTER GRAPHICS (Session - 6 ) Marks: 35 Time: 120min

Student Name: ______________________________

Center Name/Code: ______________________________

Exam Date: Tuesday, November 20, 2007

from anyone.

b. If you believe that some essential piece of information is missing, make an appropriate assumption and use it to solve the problem.

Question Marks Total

Q1. ( Marks: 10 )

Suppose an RGB raster system is to be designed using an 10*8 inch screen with a resolution of 100 pixels per inch in each direction. If we want to store 12 bits in per pixel in the frame buffer, how much storage (in bytes) do we need for the frame buffer?

Q2. ( Marks: 10 )

Which algorithm finds the closest integer coordinates to the actual line. Summarize this algorithm and suggest some improvements.

Q3. ( Marks: 10 )

What could be the ways to implement area filling on raster systems? Summarize scan line polygon filling algorithm in your own words.

Q4. ( Marks: 1 )

Intensity of the electron beam is controlled by setting _________ levels on the control grid, a metal cylinder that fits over the cathode.

1. Amplitude
2. Current
3. Voltage
4. electron

Q5. ( Marks: 1 )

True or false. Using Cohen-Sutherland line clipping, it is impossible for a vertex to be labeled 1111.

1. true

false

Q6. ( Marks: 1 )

Shadow mask methods can display a __________ range of colours.

1. Small
2. Wide
3. Random
4. crazy

Q7. ( Marks: 1 )

Which one of the following step is not involved to write pixel using video BIOS services.

1. Setting desired video mode
2. Using bios service to set color of a screen pixel
3. Calling bios interrupt to execute the process of writing pixel.
4. Using OpenGL service to set color of a screen pixel

Q8. ( Marks: 1 )

Each number that makes up a matrix is called an ___________ of the matrix.

1. Element
2. Variable
3. Value
4. component