Practical antialiasing methods

CS 248 - Introduction to Computer Graphics
Autumn Quarter, 2000
Marc Levoy
Lecture notes for Tuesday, October 17 (and a bit of Thursday, October 19)

Table of contents:

• What's the best way to prevent aliasing?
  • Raising the sampling rate versus filtering
  • Problem: fixed resolution displays
• Supersampling followed by resampling
  • The resampling pipeline
  • Preconvolving r and g
  • Approximations
  • Supersampling versus filtering
• Practical supersampling
  • Algorithm 1: regular supersampling
  • Algorithm 2: practical stochastic supersampling
  • Demonstration of supersampling
• Practical analytical filtering (covered on Thursday, October 19)
  1. Unweighted area sampling
  2. Weighted area sampling