Information transmission for sub‐pixel edge positioning

Academic Article


  • Abstract— Unresolved gray pixels can be used to adjust perceived edge position with sub‐pixel precision. To quantify the tradeoff between gray scale and pixel density for edge localization, we provide both a theoretical information‐transmission analysis and an estimate of the information transmittable based on an edge‐alignment experiment. From vernier acuity data obtained in the experiment, we estimate that no more than 3 bits of luminance are needed to maximize such use of pixel information. Under optimal conditions, using gray scale for sub‐pixel edge positioning reduces frame‐buffer memory requirements by about 75% from that required for high‐resolution black‐and‐white displays of equivalent positioning performance. 1993 Society for Information Display
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Naiman AC; Makous W
  • Start Page

  • 437
  • End Page

  • 447
  • Volume

  • 1
  • Issue

  • 4