Recent questions tagged computer-graphics

+1 vote

2 answers

1

UGCNET-July-2018-II-8
A graphic display system has a frame buffer that is 640 pixels high ans 1 bit of color depth. If the access time for each pixel on the average is 200 nanoseconds, then the refresh rate of this frame buffer is approximately: 16 frames per second 19 frames per second 21 frames per second 23 frames per second

asked Jul 13, 2018 in Computer Graphics by Pooja Khatri Boss (10.8k points) | 2.4k views

0 votes

1 answer

2

UGCNET-July-2018-II-9
Which of the following statements is/are True regarding the solution of the visibility problem in 3D graphics? S1: The painter's algorithm sorts polygons by depth and then paints (scan - converts) each Polygon on to the screen starting with the most ... S2: Backface Culling refers to eliminating geometry with backfacing normals S1 only S2 only Both S1 and S2 Neither S1 nor S2

asked Jul 13, 2018 in Computer Graphics by Pooja Khatri Boss (10.8k points) | 726 views

+2 votes

2 answers

3

UGCNET-July-2018-II-10
Consider the matrix $M=\begin{bmatrix} 2 & 0 & 2 \\ 0 & 1 & 1 \\ 0 & 0 & 1 \end{bmatrix}$ representing a set of planar (2D) geometric transformations in homogeneous coordinates. Which of the following statements about the matrix ... shearing of parameters (-1,1) M represents first, a shearing of parameters (-1, 1) followed by scaling of vector (3,1)

asked Jul 13, 2018 in Computer Graphics by Pooja Khatri Boss (10.8k points) | 1.5k views

0 votes

2 answers

4

UGC NET July 2018 Q 9
Which of the following statements is/are True regarding the solution to the visibility problem in $3D$ graphics ? $S1 :$ The Painter's algorithm sorts polygons by depth and then paints (scan - converts) each Polygon on to the screen starting with ... Backface Culling refers to eliminating geometry with backfacing normals. S1 only S2 only Both S1 and S2 Neither S1 nor S2

asked Jul 11, 2018 in Computer Graphics by Sanjay Sharma Boss (48.8k points) | 197 views

+1 vote

1 answer

5

ISRO2018-39
Perform window to viewport transformation for the point (20,15). Assume that $(X_{wmin}\ ,Y_{wmin} )$ is $(0,0)$ ; $(X_{wmax}\ ,Y_{wmax} )$ is $(100,100)$ ; $(X_{vmin}\ ,Y_{vmin} )$ is $(5,5)$ ; $(X_{vmax}\ ,Y_{vmax} )$ is $(20,20)$ . The value of $x$ and $y$ in the viewport is $x=4,y=4$ $x=3,y=3$ $x=8,y=7.25$ $x=3,y=4$

asked Apr 22, 2018 in Others by Arjun Veteran (424k points) | 569 views

0 votes

0 answers

6

Graphics
I have a confusion that how the Gpu internal memory different from primary memory in the sense when which of the memory is active. For example suppose i am doing GPU programming or playing a video game then primary memory plays a role or only GPU memory. Suppose I increased my RAM without touching GPU will there be any improvement in my Gpu programming or my video games.

asked Mar 15, 2018 in Computer Graphics by Na462 Loyal (6.9k points) | 121 views

+1 vote

1 answer

7

UGCNET-Nov2017-iii-18
The three aspects of Quantization, programmers generally concerned with are: A. Coding error, Sampling rate and Amplification B. Sampling rate, Coding error and Conditioning C. Sampling rate, Aperture time and Coding error D. Aperture time, Coding error and Strobing

asked Nov 5, 2017 in Computer Graphics by Arjun Veteran (424k points) | 315 views

+1 vote

2 answers

8

UGCNET-Nov2017-iii-15
With respect to CRT, the horizontal retrace is defined as: A. The path an electron beam takes when returning to the left side of the CRT. B. The path an electron beam takes when returning to the right side of the CRT. C. The technique of turning, the electron beam off while retracing. D. The technique of turning, the electron beam on/ off while retracing.

asked Nov 5, 2017 in Computer Graphics by Arjun Veteran (424k points) | 410 views

+1 vote

1 answer

9

UGCNET-Nov2017-iii-14
Which of the following is not true in case of Oblique Projections? A. Parallel projection rays are not perpendicular to the viewing plane. B. Parallel lines in space appear parallel on the final projected image. C. Used exclusively for pictorial purposes rather than formal working drawings. D. Projectors are always perpendicular to the plane of projection.

asked Nov 5, 2017 in Computer Graphics by Arjun Veteran (424k points) | 343 views

+1 vote

1 answer

10

UGCNET-Nov2017-iii-13
Which of the following is not a component of Memory tube display? A. Flooding gun B. Collector C. Ground D. Liquid Crystal

asked Nov 5, 2017 in Computer Graphics by Arjun Veteran (424k points) | 469 views

+1 vote

2 answers

11

UGCNET-AUG2016-III-18
The Liang-Barsky line clipping algorithm uses the parametric equation of a line from $(x_{1} , y_{1} )$ to $(x_{2} , y_{2} )$ along with its infinite extension which is given as : $x = x_{1} + \Delta x.u$ $y = y_{1} + \Delta y.u$ ... is given as : $(0, \frac{2}{3})$ $\left(\frac{1}{6},\frac{5}{6}\right)$ $(0, \frac{1}{3})$ $(0, 1)$

asked Oct 1, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 878 views

+1 vote

1 answer

12

UGCNET-AUG2016-III-17
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 _____. Topological distortion Vanishing point View confusion Perspective foreshortening

asked Oct 1, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 619 views

+6 votes

1 answer

13

UGCNET-AUG2016-III-16
A point $P(2, 5)$ is rotated about a pivot point $(1, 2)$ by 60°. What is the new transformed point $P'$ ? $(1, 4)$ $(–1, 4)$ $(1, – 4)$ $(– 4, 1)$

asked Oct 1, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 1.9k views

+1 vote

1 answer

14

UGCNET-AUG2016-III-15
Consider the Breshenham's line generation algorithm for a line with gradient greater than one, current point $(x_{ i} , y_{i} )$ and decision parameter, $d_{i}$. The next point to be plotted $(x _{i+1}, y_{i+1})$ and updated decision parameter, $d_{i+1}$, for $d_{i} < 0$ are given as _______ ... $x_{ i+1} = x_{ i + 1} y_{i+1} = y_{i + 1} d_{i+1} = d_{i} + 2 (dy - dx)$

asked Oct 1, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 338 views

+3 votes

1 answer

15

UGCNET-AUG2016-III-14
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 ? $2^{N}$ $2^{W}$ $2^{N+W}$ $2^{N-1}$

asked Sep 30, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 689 views

+1 vote

1 answer

16

UGCNET-AUG2016-III-13
Consider a raster grid having $XY$-axes in positive $X$-direction and positive upward $Y$-direction with $X_{max} = 10$, $X_{min} = –5$, $Y_{max} = 11$, and $Y_{min} = 6$. What is the address of memory pixel with location $(5, 4)$ in raster grid assuming base address $1$ (one) ? $150$ $151$ $160$ $161$

asked Sep 30, 2016 in Computer Graphics by makhdoom ghaya Boss (30.1k points) | 2.3k views

+2 votes

1 answer

17

UGCNET-June2016-III-60
Which of the following is used for the boundary representation of an image object? Quad Tree Projections Run length coding Chain codes

asked Aug 21, 2016 in Digital Image Processing by jothee Veteran (105k points) | 1.1k views

+2 votes

1 answer

18

UGCNET-June2016-III-18
Which of the following statements is/are correct with reference to curve generation? Hermite curves are generated using the concepts of interpolation Bezier curves are generated using the concepts of approximation The Bezier curve lies entirely within the convex hull of its control ... of control points I, II and IV only II and III only I and II only I, II and III only

asked Aug 20, 2016 in Computer Graphics by jothee Veteran (105k points) | 839 views

+1 vote

3 answers

19

UGCNET-June2016-III-17
Let us consider that the original point is (x,y) and new transformed point is (x’,y’). Further Sh$_x$ and Sh$_y$ are shearing factors in x and y directions. If we perform the y direction shear relative to x=s$_{ref}$ then the transformed point is given by $x’=x+Sh_x.(y-y_{ref}); y’=y$ $x’=x; y’=y.Sh_x$ $x’=x; y’=Sh_y(x-x_{ref})+y$ $x’=Sh_y.y; y’=y.(x-x_{ref})$

asked Aug 20, 2016 in Computer Graphics by jothee Veteran (105k points) | 949 views

+2 votes

1 answer

20

UGCNET-June2016-III-15
Let R be the rectangular window against which the lines are to be clipped using 2D Sutherland-Cohen line clipping algorithm. The rectangular window has lower rectangular corner at (-5, 1) and upper right-hand corner at (3, 7). Consider the following three lines for clipping ... E(-2,3) and F(1,2) Which of the following lines is/are candidate for clipping? AB DC EF AB and CD

asked Aug 18, 2016 in Computer Graphics by jothee Veteran (105k points) | 2k views

+5 votes

1 answer

21

UGCNET-June2016-III-13
Consider the Breshenman's circle generation algorithm for plotting a circle with centre (0,0) and radius 'r' unit in first quadrant. If the current point is $(x_i, y_i)$ and decision parameter is $p_i$ then what will be the next point $(x_{i+1}, y_{i+1})$ ... $x_{i+1}=x_i-1; y_{i+1}=y_i; p_{i+1}=p_i+4x_i+10$

asked Aug 18, 2016 in Computer Graphics by jothee Veteran (105k points) | 1.4k views

+3 votes

4 answers

22

UGCNET-June2016-III-14
A point P(5,1) is rotated by 90$^o$ about a pivot point (2,2). What is the coordinate of new transformed point P'? (3,5) (5,3) (2,4) (1,5)

asked Aug 13, 2016 in Computer Graphics by Meenakshi Sharma Active (2.3k points) | 3.5k views

+3 votes

3 answers

23

UGCNET-June2016-III-16
In perspective projection, if a line segment joining a point which lies in front of the viewer to a point in back of the viewer is projected to a broken line of infinte extent. This is known as ____ View confusion Vanishing point Topological distortion Perspective foreshortening

asked Aug 13, 2016 in Computer Graphics by Meenakshi Sharma Active (2.3k points) | 1.3k views

+3 votes

1 answer

24

UGCNET-Dec2015-III-7
Consider a unit square centered at origin. The coordinates at the square are translated by a factor $\biggr( \frac{1}{2}, 1 \biggl)$ and rotated by an angle of 90$^o$ ...

asked Aug 11, 2016 in Computer Graphics by jothee Veteran (105k points) | 2.8k views

+3 votes

1 answer

25

UGCNET-Dec2015-III-69
Which raster locations would be chosen by Bresenham's algorithm when scan converting a line from (1,1) to (8,5)? x y 1 2 3 4 5 6 7 8 1 2 3 3 4 4 5 6 x y 1 2 3 4 5 6 7 8 1 2 2 3 4 5 6 7 x y 1 2 3 4 5 6 7 8 1 2 2 3 3 4 4 5 x y 1 2 3 4 5 6 7 8 1 2 2 3 5 4 5 5

asked Aug 11, 2016 in Computer Graphics by jothee Veteran (105k points) | 1.9k views

+2 votes

1 answer

26

UGCNET-Dec2015-III-67
Which of the following is/are the principle components of a memory-tube display? Flooding gun Collector Phosphorus grains Ground a and b c only d only All of the above

asked Aug 11, 2016 in Computer Graphics by jothee Veteran (105k points) | 1.8k views

+1 vote

1 answer

27

UGCNET-Dec2015-III-71
Which of the following is/are the components of a CRT ? Electron Gun Control Electrode Focusing Electrode Phosphor Coated Screen a and d a, b and d a, b, c and d a, c and d

asked Aug 2, 2016 in Computer Graphics by Sankaranarayanan P.N Boss (11k points) | 696 views

+2 votes

1 answer

28

UGCNET-June2015-III-18
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. Phosphorous grains iv. Used in memory - ... , d-iv, e-v a-iii, b-i, c-ii, d-v, e-iv a-iv, b-v, c-i, d-ii, e-iii

asked Jul 31, 2016 in Computer Graphics by jothee Veteran (105k points) | 670 views

+2 votes

1 answer

29

UGCNET-June2015-III-17
Which of the following statements is/are incorrect? 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 The right-handed cartesian co-ordinates system ... of the co-ordinate system, is known as normalized device co-ordinate system a only a and b c only d only

asked Jul 31, 2016 in Computer Graphics by jothee Veteran (105k points) | 603 views

+2 votes

1 answer

30

UGCNET-June2015-III-16
Which of the following is not a basic primitive of the Graphics Kernel System (GKS)? POLYLINE POLYDRAW FILL AREA POLYMARKER

asked Jul 31, 2016 in Computer Graphics by jothee Veteran (105k points) | 754 views

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