• 1. Computer Graphics
  • 1.1. Screen
  • 1.2. Colours
  • 1.3. Rasterisation
  • 1.4. Anti-Aliasing
    • 1.4.1. Staircase Effects
    • 1.4.2. How is Anti-Aliasing realized?
    • 1.4.3. Unit-Summary
  • 1.5. Geometric Transformations
  • 1.6. Curves
  • 1.7. Paths
  • 1.8. Self Assessment
  • 1.9. Summary
  • 1.10. Recommended Reading
  • 1.11. Glossary
  • 1.12. Bibliography
  • 1.13. Metadata

1.4.3. Unit-Summary

On raster displays lines have to be approximated by intensifying the grid-point pixels lying on it or nearest to it. From this method emerge jags in the line which are called staircase effect. To soften this effect we apply a procedure called anti-aliasing. Its principle is to use grey values for some pixels in black and white pictures or to use various transparency values for some pixels in coloured pictures.

Update: 26.1.2012 (eLML) - Contact - Print (PDF) - © CartouCHe 2004-2007 (Creative Commons) - layout based on YAML