Go to the NASA Homepage
Search >
Click to Search
Human Systems Integration Division homepageHuman Systems Integration Division homepage Organization pageOrganization page Technical Areas pageTechnical Areas page Outreach and Publications pageOutreach and Publications page Contact pageContact page
Human Systems Integration Division Homepage
Outreach & Publications Sidebar Header
Go to the Outreach & Publications pageGo to the Outreach & Publications page
Go to Awards pageGo to Awards page
Go to News pageGo to News page
Go to Factsheets pageGo to Factsheets page
Go to Multimedia pageGo to Multimedia page
Go to Human Factors 101 pageGo to Human Factors 101 page
What is Human System Integration? Website
Publication Header
Anisotropy In An Ambiguous Kinetic Depth Effect  (1992)
Abstract Header
A set of animated stimuli (Lissajous figures) is described, each element of which is physically consistent with two different three-dimensional shapes undergoing rigid rotations about orthogonal axes. Human observers typically show a preference for one shape or the other; this preference may be biased by manipulating various parameters of the stimulus. Fairly good predictions of which shape will be seen are made using an adaptation of Hildreth's "smoothest velocity field" computation. When a given stimulus is rotated 90 degrees in the picture plane, the resolution of the ambiguity is often different, demonstrating anisotropy in the processing of the figures. The nature of this bias is such that for certain figures subjects see a three-dimensional object rotating about a vertical axis regardless of which two-dimensional orientation is used to present the stimulus. This bias is not predicted by the Hildreth model. One interpretation of the results is that ambiguity in two-dimensional visual motion (i.e., the aperure problem) is not resolved prior to the interpretation of three-dimensional structure.
Private Investigators Header
Authors Header
Groups Header
Keywords Header
Ambiguous, Anisotropy, Depth, Effect, Kinetic
References Header
J. Opt. Soc. Am. A, 9, 521-529.
Download Header
Adobe PDF Icon  josaa-9-4-521.pdf (Download Acrobat Reader Click to download Adobe Acrabat Reader)
  (1220KB) (application/pdf)
Go to the First Gov Homepage
Go to the NASA - National Aeronautics and Space Administration Homepage
Curator: Phil So
NASA Official: Jessica Nowinski
Last Updated: August 15, 2019