Lind, M, Lee, YL, Mazanowski, J et al. (2 more authors) (2014) Affine operations plus symmetry yield perception of metric shape with large perspective changes (≥ 45°): data and model. Journal of Experimental Psychology: Human Perception and Performance, 40 (1). 83 - 93. ISSN 0096-1523
Abstract
G. P. Bingham and M. Lind (2008, Large continuous perspective transformations are necessary and sufficient for accurate perception of metric shape, Perception & Psychophysics, Vol. 70, pp. 524–540) showed that observers could perceive metric shape, given perspective changes ≥45° relative to a principal axis of elliptical cylinders. In this article, we tested (a) arbitrary perspective changes of 45°, (b) whether perception gradually improves with more perspective change, (c) speed of rotation, (d) whether this works with other shapes (asymmetric polyhedrons), (e) different slants, and (f) perspective changes >45°. Experiment 1 compared 45° perspective change away from, versus centered on, a principal axis. Observers adjusted an ellipse to match the cross-section of an elliptical cylinder viewed in a stereo-motion display. Experiment 2 tested whether performance would improve gradually with increases in perspective change, or suddenly with a 45° change. We also tested speed of rotation. Experiment 3 tested (a) asymmetric polyhedrons, (b) perspective change beyond 45°, and (c) the effect of slant. The results showed (a) a particular perspective was not required, (b) judgments only improved with ≥45° change, (c) speed was not relevant, (d) it worked with asymmetric polyhedrons, (e) slant was not relevant, and (f) judgments remained accurate beyond 45° of change. A model shows how affine operations, together with a symmetry yielded by 45° perspective change, bootstrap perception of metric shape.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Keywords: | 3D shape perception; affine geometry; space perception; metric; structure-from-motion; stereo motion |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > Institute for Transport Studies (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 May 2014 13:30 |
Last Modified: | 03 Nov 2016 17:58 |
Published Version: | http://dx.doi.org/10.1037/a0033245 |
Status: | Published |
Publisher: | American Psychological Association |
Identification Number: | 10.1037/a0033245 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78727 |