Q. Which of the following statement(s) is/are incorrect?

(a) Mapping the co-ordinates of the points and lines that form the picture into the appropriate co-ordinates on the device or workstation is known as viewing transformation.

(b) The right-handed Cartesian co-ordinates system in whose co-ordinates we describe the picture is known as world co-ordinate system.

(c) The co-ordinate system that corresponds to the device or workstation where the image is to be displayed is known as physical device co-ordinate system.

(d) Left - handed co-ordinate system in which the display area of the virtual display device corresponds to the unit (|x|) square whose lower left-hand corner is at the origin of the co-ordinate system, is known as normalized device co-ordinate system.

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Q. Match the following:

List – I List – II

(a) Flood Gun (i) An electron gun designed to flood the entire screen with electrons.

(b) Collector (ii) Partly energized by flooding gun, stores the charge generated by the writing gun.

(c) Ground (iii) Used to discharge the collector.

(d) Phosphorus grains (iv) Used in memory - tube display and similar to those used in standard CRT.

(e) Writing Gun System (v) Used in memory - tube display and basically the same as the electron gun used in a conventional CRT.

code:
a b c d e

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Q. The redundancy in images stems from :

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Q. Beam-penetration and shadow-mask are the two basic techniques for producing color displays with a CRT.
Which of the following is not true ?
I. The beam-penetration is used with random scan monitors.
II. Shadow-mask is used in raster-scan systems.
III. Beam-penetration method is better than shadow-mask method.
IV. Shadow-mask method is better than beam-penetration method.

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Q. Line caps are used for adjusting the shape of the line ends to give them a better appearance. Various kinds of line caps used are

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Q. Given below are certain output primitives and their associated attributes. Match each primitive with its corresponding attributes :

List­ I                                  List - II

a. Line                                  i. Type, Size, Color

b.  Fill Area                           ii. Color, Size, Font

c.  Text                                  iii. Style, Color, Pattern

d.   Marker                            iv.Type, Width, Color

Codes :

a             b               c                  d 

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Q. Consider a window bounded by the lines : x = 0; y= 0; x = 5 and y = 3. The line segment joining (-1, 0) and (4, 5), if clipped against this window will connect the points

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Q. Which of the following color models are defined with three primary colors ?

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Q. Which of the following statement(s) is/are correct?

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Q. A segment is any object described by GKS commands and data that start with CREATE SEGMENT and Terminates with CLOSE SEGMENT command. What functions can be performed on these segments?

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Q. Match the following:

a. Glass                         i. Contains liquid crystal and serves
as a bonding surface for a conductive
coating.
b. Conductive coating ii. Acts as a conductor so that a voltage
can be applied across the liquid crystal.
c. Liquid Crystal           iii. A substance which will polarize light
when a voltage is applied to it.
d. Polarized film           iv. A transparent sheet that polarizes light.

Codes:
     a  b   c   d

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Q. Below are the few steps given for scan-converting a circle using Bresenham's Algorithm. Which of the given steps is not correct?

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Q. Which of the following is/are side effects of scan conversion?

a. Aliasing
b. Unequal intensity of diagonal lines
c. Over striking in photographic applications
d. Local or Global aliasing

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Q. Consider a line AB with A = (0,0) and B = (8, 4). Apply a simple DDA algorithm and compute the first four plots on this line.

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Q. Consider a raster grid having XY-axes in positive X-direction and positive upward Y-direction with Xmax = 10, Xmin = –5, Ymax = 11, and Ymin = 6. What is the address of memory pixel with location (5, 4) in raster grid assuming base address 1 (one)?

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Q. Consider a N-bit plane frame buffer with W-bit wide lookup table with W > N. How many intensity levels are available at a time?

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Q. Consider the Breshenham’s line generation algorithm for a line with gradient greater than one, current point (xi, yi) and decision parameter, di. The next point to be plotted (xi+1, yi+1) and updated decision parameter, di+1, for di < 0 are given as .................

(A) xi+1 = xi+1
yi+1 = yi
di+1 = di + 2 dy

(B) xi+1 = xi
yi+1 = yi + 1
di+1 = di + 2 dx

(C) xi+1 = xi
yi+1 = yi + 1
di+1 = di + 2 (dx – dy)

(D) xi+1 = xi + 1
yi+1 = yi + 1
di+1 = di + 2 (dy – dx)

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Q. A point P(2, 5) is rotated about a pivot point (1, 2) by 60°. What is the new transformed point P'?

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Q. In perspective projection (from 3D to 2D), objects behind the centre of projection are projected upside down and backward onto the view-plane. This is known as ..............

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Q. The Liang-Barsky line clipping algorithm uses the parametric equation of a line from (x1,y1) to (x2,y2) along with its infinite extension which is given as :

x = x1 + Dx.u
y = y1 + Dy.u

Where Dx = x2 – x1, Dy = y2 – y1, and u is the parameter with 0 ≤ u ≤ 1. A line AB with end points A(–1, 7) and B(11, 1) is to be clipped against a rectangular window with xmin=1, xmax=9, ymin=2, and ymax=8. The lower and upper bound values of the parameter u for the clipped line using Liang-Barsky algorithm is given as:

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