DOEACC Society 2007 DOEACC A Level A10.3-R3 Computer Graphics - Question Paper

1.9 The 2nd derivative of the Bezier curve at the initial and final points depend on
A) the closest 2 polygon vertices
B) the closest 3 polygon vertices
C) the closest 4 polygon vertices
D) none of the above
1.10 The process of creating computer animation by specifying a number of model poses and
allowing the computer to interpolate these poses to produce smooth movement is called
A) stop motion animation
B) key framing
C) rotoscoping
D) rendering
A10.3-R3 Page two of five January, 2007
2. every statement beneath is either actual or FALSE. select the most improper one
and ENTER in the “tear-off” sheet attached to the ques. paper, subsequent
instructions therein. (1 x 10)
2.1 The viewing transformations for orthographic projection include a shear matrix.
2.2 The data point in a bitmap field map is the pixel to the image.
2.3 The 2 point perspective transformation does not give an adequate perception of
the three-dimensional shape of the object.
2.4 For a B-spline curve of degree 3, a point on the curve lies within the convex hull of two
neighboring points
2.5 The Mid Point subdivision algorithm is applicable even if the clipping window is not a
regular rectangular polygon.
2.6 If refreshing rate remains constant then phosphor material with high persistence causes
flickering.
2.7 If we change the viewport, we see the identical part of the object drawn at various places
on the display.
2.8 The vector objects are easily scalable without loss of resolution or image quality.
2.9 JPEG files can be saved numerous times with no loss in image quality.
2.10 Objects do not appear to be distorted when viewed through oblique projection.
3. Match words and phrases in column X with the nearest related meaning/
word(s)/phrase(s) in column Y. Enter your selection in the “tear-off” ans sheet
attached to the ques. paper, subsequent instructions therein. (1 x 10)
X Y
3.1 Technique used to create the illusion of 1 object
changing shape to a different
A. Spline curve
3.2 System used for representing colours on computer B. Parametric curve
3.3 Abbreviation for dots per inch, which shows the
resolution of images
C. RGB
3.4 Continuous curve that begins with 1 control point
and end with a different end at other control point
D. Morphing
3.5 An artificial environment created with computer
hardware and software
E. GIF
3.6 Technique to remove jagged lines F. Antialising

Earning:   Approval pending.