Title
The role of perspective effects and accelerations in perceived three-dimensional structure-from-motion
Author
Hogervorst, M.A.
Eagle, R.A.
Publication year
2000
Abstract
It has been suggested that perceived three-dimensional (3D) structure-from-motion can be accounted for by a 2-frame orthographic approximation of the flow field. This study investigated the extent to which higher order cues (perspective and acceleration) are used in addition to first-order flow. Participants matched the 3D dihedral angle of a hinged plane (probe) defined by multiple-depth cues to one defined by motion only, for stimulus sizes of 8 and 33°, using perspective and orthographic projection. The results show that perspective effects can be important even for relatively small stimuli (8°) and that accelerations contribute to perceived shape. In all conditions, large biases were found. These are well accounted for by a model in which ail relevant flow measurements (first-order, perspective, and acceleration) are used together with estimates of the noise in each. The model has no built-in bias toward particular 3D shapes. Instead, the visual system may act as an optimal estimator of 3D structure-from-motion.
Subject
Perception
Bayes theorem
human
movement perception
physiology
psychological model
time perception
Bayes Theorem
Humans
Models, Psychological
Motion Perception
Time Perception
To reference this document use:
http://resolver.tudelft.nl/uuid:71cae554-3b3a-44ba-a75b-2c7d0f2fe1f2
TNO identifier
9800
Source
Journal of Experimental Psychology: Human Perception and Performance, 26 (3), 934-955
Document type
article