Tags

Type your tag names separated by a space and hit enter

Stereo improves 3D shape discrimination even when rich monocular shape cues are available.
J Vis. 2011 Aug 17; 11(9)JV

Abstract

We measured the ability to discriminate 3D shapes across changes in viewpoint and illumination based on rich monocular 3D information and tested whether the addition of stereo information improves shape constancy. Stimuli were images of smoothly curved, random 3D objects. Objects were presented in three viewing conditions that provided different 3D information: shading-only, stereo-only, and combined shading and stereo. Observers performed shape discrimination judgments for sequentially presented objects that differed in orientation by rotation of 0°-60° in depth. We found that rotation in depth markedly impaired discrimination performance in all viewing conditions, as evidenced by reduced sensitivity (d') and increased bias toward judging same shapes as different. We also observed a consistent benefit from stereo, both in conditions with and without change in viewpoint. Results were similar for objects with purely Lambertian reflectance and shiny objects with a large specular component. Our results demonstrate that shape perception for random 3D objects is highly viewpoint-dependent and that stereo improves shape discrimination even when rich monocular shape cues are available.

Authors+Show Affiliations

Department of Psychology, University of Hong Kong, Hong Kong. younglee@hku.hkNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21849629

Citation

Lee, Young Lim, and Jeffrey A. Saunders. "Stereo Improves 3D Shape Discrimination Even when Rich Monocular Shape Cues Are Available." Journal of Vision, vol. 11, no. 9, 2011.
Lee YL, Saunders JA. Stereo improves 3D shape discrimination even when rich monocular shape cues are available. J Vis. 2011;11(9).
Lee, Y. L., & Saunders, J. A. (2011). Stereo improves 3D shape discrimination even when rich monocular shape cues are available. Journal of Vision, 11(9). https://doi.org/10.1167/11.9.6
Lee YL, Saunders JA. Stereo Improves 3D Shape Discrimination Even when Rich Monocular Shape Cues Are Available. J Vis. 2011 Aug 17;11(9) PubMed PMID: 21849629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Stereo improves 3D shape discrimination even when rich monocular shape cues are available. AU - Lee,Young Lim, AU - Saunders,Jeffrey A, Y1 - 2011/08/17/ PY - 2011/8/19/entrez PY - 2011/8/19/pubmed PY - 2011/12/21/medline JF - Journal of vision JO - J Vis VL - 11 IS - 9 N2 - We measured the ability to discriminate 3D shapes across changes in viewpoint and illumination based on rich monocular 3D information and tested whether the addition of stereo information improves shape constancy. Stimuli were images of smoothly curved, random 3D objects. Objects were presented in three viewing conditions that provided different 3D information: shading-only, stereo-only, and combined shading and stereo. Observers performed shape discrimination judgments for sequentially presented objects that differed in orientation by rotation of 0°-60° in depth. We found that rotation in depth markedly impaired discrimination performance in all viewing conditions, as evidenced by reduced sensitivity (d') and increased bias toward judging same shapes as different. We also observed a consistent benefit from stereo, both in conditions with and without change in viewpoint. Results were similar for objects with purely Lambertian reflectance and shiny objects with a large specular component. Our results demonstrate that shape perception for random 3D objects is highly viewpoint-dependent and that stereo improves shape discrimination even when rich monocular shape cues are available. SN - 1534-7362 UR - https://www.unboundmedicine.com/medline/citation/21849629/Stereo_improves_3D_shape_discrimination_even_when_rich_monocular_shape_cues_are_available_ L2 - http://jov.arvojournals.org/article.aspx?doi=10.1167/11.9.6 DB - PRIME DP - Unbound Medicine ER -