ITCS 3120 Fall 2025 Midterm Practice

[5pts] There are no commercially available small pixel technologies that can individually
change color. Name and describe two generic methods used to create colored pixels.

(The question is asking for two generic concepts discussed in class, not for specifics such
LCD, CRT, etc.)

Displaying Color
• There are no commercially available small pixel
technologies that can individually change color.
• spatial integration – place “mini”-pixels of a few fixed
colors very close together. The eye & brain spatially
integrate the “mini”-pixel cluster into a perception of a
pixel of arbitrary color
• temporal integration - field sequential color uses red,
blue and green liquid crystal shutters to change color in
front of a monochrome light source. The eye & brain
temporally integrate the result into a perception of pixels
of arbitrary color

[5pts] We discussed 4 classes of polygons in class. Name 3 types and describe each their defining properties. Also provide example illustrations.

Answer: 3 of the 4 below (extra credit if all 4 correct answers were given)

[10pts] Illustrate the basic architecture of a computer graphics workstation at the level of key processors, buses, memory, etc. Illustrate and label in as much detail as possible: