19-04-2013, 03:00 PM
EXAMINATION ON COMPUTER GRAPHICS AND IMAGE PROCESSING
EXAMINATION ON COMPUTER.pdf (Size: 128.44 KB / Downloads: 116)
Objective : Part-I
It contains 40 multiple choice questions with four choice and student will have to pick
the correct one (each carrying 1/2 mark)
1. Sub-dividing the total and determining the number of sub-pixels inside the area boundary
is called:
(a) Pixel Phasing
(b) Pixel Weighting
© Filtering
(d) Super Sampling
2. The region against which an object is to be clipped is called:
(a) Clipping
(b) Clip Window
© View Port
(d) All of the above
3. DAC is:
(a) Direct Access Code
(b) Digital Align Code
© Direct Area Clipping
(d) Digital to Analog converter
4. In Cohen-Sutherland line clipping, every line end-point in a picture is assigned a four
digit binary code, called:
(a) Front point
(b) End point
© Region code
(d) All of the above
5. In Raster scan displays picture definition is stored in a memory area called:
(a) Refresh buffer (b) Picture element
© Pixels (d) None of the above
6. Polygon-Clipping algorithms include the:
(a) Sutherland-Hodgeman method
(b) Liang-Barsky method
© Weiler-Atherton method
(d) All of the above
7. Oblique projection is:
(a) An orthographic projection
(b) A perspective projection
© a parallel projection
(d) an axonometric projection
8. Two-dimensional viewing transformation is referred as:
(a) Window to view port transformation
(b) Windowing transformation
© Both (a) and (b)
(d) None of the above
9. Typical Raster functions often provided in graphic packages are:
(a) Copy
(b) Read
© Write
(d) All of the above
10. The convolution operation in anti-aliasing is known as:
(a) Half-toning (b) Filtering
© Shielding (d) None of the above
11. In LCDs picture definition are stored in a refresh buffer, and the screen is refreshed
at the rate of:
(a) 50 Frames per second
(b) 60 Frames per second
© 70 Frames per second
(d) 80 Frames per second
12. Lower persistence phosphors require:
(a) lower refresh rate (b) high refresh rat e
© any rate
(d) Specific rate of maintain a smooth picture
13. In Wailer-Atherton algorithm for polygon clipping the subject polygon is:
(a) Clipping window
(b) Polygon to be clipped
© Any to the above
(d) None of the above
14. In which LCD displays transistors are used to control the voltage at pixel locations
and to prevent charges from leaking out of the liquid crystal cells;
(a) Passive matrix LCD
(b) Active Matrix LCD
© Both (a) and (b)
(d) None of the above
15. The process of extracting a portion of a database or a picture:
(a) Clipping
(b) Database querying
© Dithering
(d) None of the above
16. Line clipping can also be carried out for:
(a) Concave
(b) Polygon clipping windows
© Clipping window
(d) All of the above
17. Conceptually drawing a line from any position P to a distant point outside the
coordinate extents of the object and counting the number of edge crossing along the
lines:
(a) Odd-even rule
(b) Odd priority rule
© Even-of rule
(d) All of the above
18. Shadow Mask method are used in:
(a) Raster Scan monitors
(b) Random scan monitors
© Both (a) and (b)
(d) None to the above
19. 45 degree rotation about y axis will move a vector on x axis to:
(a) xz-plane
(b) xy-plane
© yz - plane
(d) z-axis
20. Active Edge lists are used in:
(a) Seed Fill Area Filling
(b) Scan Line Area Filling
© Sutherland-Cohen Algorithm
(d) Cyrus-Beck Clipping Algorithm
21. A random scan (Vector) system stores point plotting instruction in the:
(a) View list
(b) Display list
© Both (a) and (b)
(d) None of the above
22. The result of mid-point division algorithm is to perform:
(a) Breadth First Search
(b) Depth First Search
© Logarithmic Search
(d) Best First Search
23. Panning on the screen is achieved by:
(a) Translation
(b) Only translation
© Scaling translation and back scaling
(d) Translation, scaling and back translating
24. Which one is an orthographic projection?
(a) Cavalier
(b) Cabinet
© Isometric
(d) None of the above