GTU Computer Graphics May 2012

Gujarat Technological University

External/Endsem/University Examination MAY-2012

Subject Name: Computer Graphics
Subject Code: 160703

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Question 1 (B)
Subquestion 1)

Problem:
Consider a Raster System with resolution 1280x1024. What size of frame buffer is needed for given system to store 24 bits per pixel? How many colors are possible in given system? What is the access time per pixel if refreshing rate is 60 frames per second?

Solution:
--> The size of frame buffer is
(1280 x 1024 x 24) / 8 = 3.93216 x 10^6 bytes
--> Total number of distinct color available is
2^24 = 16.7 million
--> The access time per pixel is
1 / (1280 x 1024 x 60) = 12.71 usec