Motion transparency from opposing luminance modulated and contrast modulated gratings

Ross Goutcher, Gunter Loffler

Research output: Contribution to journalArticle

Abstract

Two luminance gratings of identical orientation and opposite directions of motion are seen as moving across one another (i.e. moving transparently) only if they differ in spatial frequency (SF) by a factor of four or more. Identical SF gratings produce counter-phase flicker. This suggests that opposite motions cancel each other at the level of motion detection. Here we show that motion transparency is perceived with two gratings of the same SF and orientation moving in opposite directions, when one grating is a first-order, luminance modulated (LM) stimulus and the other is a second-order, contrast modulated (CM) stimulus.

Original languageEnglish
Pages (from-to)660-670
Number of pages11
JournalVision Research
Volume49
Issue number7
DOIs
Publication statusPublished - 1 Apr 2009

Keywords

  • optics
  • motion transparency
  • vision sciences

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