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[ fall 2016 ]
ASSIGNMENT
PROGRAM BSc IT
SEMESTER SIXTH
SUBJECT CODE & NAME BT9301, Computer Graphics
CREDIT
4
Ques
1Explain image processing through picture analysis. List the uses of
interactive graphics.
Ans
Computer graphics could be a collection,
contribution and representation of imaginary objects from their computer-based
models or of real objects. In other words, it can be called the pictorial
synthesis of
Ques
2Write and explain midpoint circle drawing algorithm.
Ans
Midpoint circle drawing Algorithm
The midpoint circle drawing algorithm
also uses the eight-way symmetry of the circle to generate it. It plots 1/8
part of the circle i.e from 900 to 450 as shown in the
figure. As circle is drawn from 900
Ques
3 Define polygon filling. Explain flood fill algorithm for polygon filling.
Ans
Highlighting every pixel lying inside
the polygon with a colour other than that in the background is called filling
the polygon. The presence of linear boundaries for the polygons helps in easy
Ques
4 Write Liang Barkey’s line clipping
algorithm. Write advantages of it.
Ans
The last section showed the Cyrus-Beck
line clipping algorithm using parametric equations. It is more efficient than
Cohen-Sutherland algorithm. Liang and Barsky have developed an even more
efficient algorithm than Cyrus-Beck algorithm using parametric
Ques
5 Explain Two dimensional transformations.
Ans
The process of changing the position of
an object from one coordinate location to another in a straight line path is
called translation.
Fig.
Ques
6 Write short notes on Three Dimensional Viewing.
Ans When compared
with the 2D viewing process, the process for 3D viewing is basically more
complex. There is a 3D window in 2D viewing with the objects in the world
coordinates clipped to the window which are displayed by transforming into the
viewport. The additional dimension
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