The role of stimulus structure in spatial hyperacuity

Peter Meer, Yehoshua Y. Zeevi

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In spatial hyperacuity the subjects discriminate a stimulus feature relative to a reference, with an accuracy significantly better than the grain of the retinal mosaic. We show that the normalized thresholds have a dichotomous behavior; they are either insensitive to the spatial parameter in the experiment or increase very steeply with it. This behavior is explained by the involvement in the processing of pixel (receptor) accuracy information about the structure of the stimulus. A computational model employing optimal filtering reproduces the experimental data and suggests that processing of spatial hyperacuity tasks in the human visual system is optimal.

Original languageEnglish (US)
Pages (from-to)141-164
Number of pages24
JournalSpatial Vision
Issue number2-3
StatePublished - 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Computer Vision and Pattern Recognition


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