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Detection of skewed symmetry.
J Vis. 2008 May 27; 8(5):14.1-18.JV

Abstract

This study examined the ability of human observers to discriminate between symmetric and asymmetric planar figures from perspective and orthographic images. The first experiment showed that the discrimination is reliable in the case of polygons, but not dotted patterns. The second experiment showed that the discrimination is facilitated when the projected symmetry axis or projected symmetry lines are known to the subject. A control experiment showed that the discrimination is more reliable with orthographic, than with perspective images. Based on these results, we formulated a computational model of symmetry detection. The model measures the asymmetry of the presented polygon based on its single orthographic or perspective image. Performance of the model is similar to that of the subjects.

Authors+Show Affiliations

Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907-2081, USA. tsawada@psych.purdue.eduNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18842085

Citation

Sawada, Tadamasa, and Zygmunt Pizlo. "Detection of Skewed Symmetry." Journal of Vision, vol. 8, no. 5, 2008, pp. 14.1-18.
Sawada T, Pizlo Z. Detection of skewed symmetry. J Vis. 2008;8(5):14.1-18.
Sawada, T., & Pizlo, Z. (2008). Detection of skewed symmetry. Journal of Vision, 8(5), 1-18. https://doi.org/10.1167/8.5.14
Sawada T, Pizlo Z. Detection of Skewed Symmetry. J Vis. 2008 May 27;8(5):14.1-18. PubMed PMID: 18842085.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Detection of skewed symmetry. AU - Sawada,Tadamasa, AU - Pizlo,Zygmunt, Y1 - 2008/05/27/ PY - 2007/09/24/received PY - 2008/02/25/accepted PY - 2008/10/10/pubmed PY - 2009/2/28/medline PY - 2008/10/10/entrez SP - 14.1 EP - 18 JF - Journal of vision JO - J Vis VL - 8 IS - 5 N2 - This study examined the ability of human observers to discriminate between symmetric and asymmetric planar figures from perspective and orthographic images. The first experiment showed that the discrimination is reliable in the case of polygons, but not dotted patterns. The second experiment showed that the discrimination is facilitated when the projected symmetry axis or projected symmetry lines are known to the subject. A control experiment showed that the discrimination is more reliable with orthographic, than with perspective images. Based on these results, we formulated a computational model of symmetry detection. The model measures the asymmetry of the presented polygon based on its single orthographic or perspective image. Performance of the model is similar to that of the subjects. SN - 1534-7362 UR - https://www.unboundmedicine.com/medline/citation/18842085/Detection_of_skewed_symmetry_ L2 - http://jov.arvojournals.org/article.aspx?doi=10.1167/8.5.14 DB - PRIME DP - Unbound Medicine ER -