8. Light

Brock University
COSC 3P98 Computer Graphics
Instructor: Brian J. Ross



Light


Achromatic light


Achromatic light

Dynamic Range, # intensities for display media

 Display Media

Typical Dynamic Range

# Intensities

CRT

 150

500

LCD

 1000

400-530

OLED

 1 million - 100 million (?)

a lot

 Photographic prints

 100

465

 Photographic slides

 1000

700

 Coated paper (B&W)

 100

465

 Coated paper (colour)

 50

400

 Newsprint (B&W)

 10

234


B&W dithering


B&W dithering

i = x mod N
j = y mod N

if S(x,y) > D(i,j) then display

 

*

(7/16) e

(3/16) e

(5/16) e

(1/16) e


Colour


Colour


Raster colour model 1: RGB colour model


Raster colour model 2: HSI, HSV


References:



Back to COSC 3P98 index

COSC 3P98 Computer Graphics
Brock University
Dept of Computer Science
Copyright © 2023 B.J. Ross (Except noted figures).
http://www.cosc.brocku.ca/Offerings/3P98/course/lectures/light/
Last updated: October 14, 2023