Supra-threshold control of peripheral LOD

Benjamin Watson, Neff Walker, Larry F. Hodges

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


Level of detail (LOD) is widely used to control visual feedback in interactive applications. LOD control is typically based on perception at threshold - the conditions in which a stimulus first becomes perceivable. Yet most LOD manipulations are quite perceivable and occur well above threshold. Moreover, research shows that supra-threshold perception differs drastically from perception at threshold. In that case, should supra-threshold LOD control also differ from LOD control at threshold? In two experiments, we examine supra-threshold LOD control in the visual periphery and find that indeed, it should differ drastically from LOD control at threshold. Specifically, we find that LOD must support a task-dependent level of reliable perceptibility. Above that level, perceptibility of LOD control manipulations should be minimized, and detail contrast is a better predictor of perceptibility than detail size. Below that level, perceptibility must be maximized, and LOD should be improved as eccentricity rises or contrast drops. This directly contradicts prevailing threshold-based LOD control schemes, and strongly suggests a reexamination of LOD control for foveal display.

Original languageEnglish (US)
Pages (from-to)750-759
Number of pages10
JournalACM Transactions on Graphics
Issue number3
StatePublished - 2004
Externally publishedYes
EventACM Transactions on Graphics - Proceedings of ACM SIGGRAPH 2004 -
Duration: Aug 9 2004Aug 12 2004


  • Human factors.
  • Level of detail
  • Perception
  • Peripheral visual sensitivityh
  • Supra-threshold visual sensitivity

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design


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