A new simple and efficient antialiasing with subpixel masks

  • Authors:
  • Andreas Schilling

  • Affiliations:
  • Wilhelm-Schickard-Institut für Informatik, Graphisch-Interaktive Systeme, Auf der Morgenstelle 10/C9 7400 Tübingen, Bundesrepublik Deutschland

  • Venue:
  • Proceedings of the 18th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1991

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Abstract

Antialiasing of edges is often performed with the help of subpixel masks that indicate which parts of the pixel are covered by the object that has to be drawn. For this purpose, subpixel masks have to be generated during the scan conversion of an image. This paper introduces a new algorithm for creating subpixel masks that avoids some problems of traditional algorithms, like aliasing of high frequencies or blinking of small moving objects. The new algorithms can be implemented by lookup tables that make use of the inherent symmetry of the algorithm. The results are compared with conventional supersampling. A hardware implementation is described.