CSci 120 - Lecture 14

Multimedia Design

© Morris Firebaugh


I. Introduction

II. Conclude Chapter 7: Designing for Multimedia

Recall the Guidelines for Interactive Design

III. Color Models

Frequency and Wavelength of Light
Figure 9.15
Relationship between frequency, color,and
wavelength in air for the visible spectrum. The
principle hues labeled as color patches represent
samples of the underlying continuous spectrum.


Physiology of light:

Figure 9.20 RGB color cube.
Note how the primary colors define unit vectors
along the axes.The three corners opposite R, G,
and B are cyan (C), magenta (M), and yellow
(Y), the basis of the CMY model. The line
connecting black (0,0,0) and white (1,1,1) is
the gray scale line.

Control Panels --> Color --> Other

Figure 9.22
Filtering of white light by cyan, magenta,
and yellow filters. In this subtractive
process, the magenta filter subtracts
green light out of the white beam, leaving
only its complement, magenta.
Subtracting all three colors leaves no
light at all,-black.

Figure 9.24
The CMY color cube. Each corner is labeled with
its (c,m,y) coor-dinates. Note that the
RGB color cube is transformed int a CMY color
cube by interchanging colors across the major

Figure 9.27
HSV color hex-cone. The color space of the hue,
saturation, brightness (value) system is a
hexagonal-sided cone using a cylindrical
coordinate in which hue is measured by the
angle, f. Value ranges from 0 (black) to 1
(white), and saturation ranges from 0 on the
axis to 1 along the perimeter.


Figure 9.28
Half-plane slice through the HSVhex-cone showing the locationsof tints, tones, shades and grays.


IV. Introduction to 3D Graphics -- Swivel3D


Updated October 14, 2000