Digital compositing

CS 248 - Introduction to Computer Graphics
Spring Quarter, 1995
Marc Levoy
Lecture notes for Tuesday, May 8 (first half of class period)

Table of contents:

• Definition of digital compositing
• 1-bit matte
• Alpha channel matte (8 bit matte)
• Deriving alpha mattes
• The compositing approximation
• The assumption of uncorrelated mattes
• The compositing algebra
• To summarize
• How bad are the errors?
• Relationship to transparency