CSci 220 - Lecture 15

Web Page Design

© Morris Firebaugh




I. Graphics Formats for the WWW

 



II. GIF Format

History



GIF Compression Algorithm



GIF Features





Interlacing



Transparency



III. JPEG Format

History



Features



Examples

Original Image [JPEG format, Highest quality, 3:1 compression, Size = 115 Kb]



Medium Compression 21:1 [JPEG format, Quality = 50, Size = 20 Kb]



High Compression 28:1 [JPEG format, Quality = 25, Size = 14.6 Kb]



GIF Format [Compression 1:1 Size = 83 Kb]



Conclude:




IV. Laboratory

Assignment # 8  





Updated March 4, 2001