File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Conference Paper: Perceived 3D shape from continuous and static perspective changes

TitlePerceived 3D shape from continuous and static perspective changes
Authors
KeywordsMedical sciences
Ophthalmology and optometry
Issue Date2012
PublisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/
Citation
The 12th Annual Meeting of the Vision Sciences Society (VSS 2012), Naples, FL., 11-16 May 2012. In Journal of Vision, 2012, v. 12 n. 9, article 1042 How to Cite?
AbstractStudies of structure-from-motion have generally found that perceived depth from motion is not veridical and depends on speed. However, some recent studies have found that observers are capable of accurate metric judgments of shape when there are large changes in perspective (Bingham & Lind, 2008; Lee et al., 2008). We investigated whether continuous motion is required for accurate metric shape judgments from large perspective changes, and whether amount of perspective change modulates the speed dependence of structure-from-motion. Stimuli were views of elliptical cylinders with depth-to-width ratios (0.5-1.5) and with different slants in depth (top face: 60°, 70° or 80°). In the SFM condition, the object was rotated around the normal axis by either ±10° or ±45°. The rotation was sinusoidal with peak speed of either 15°/s, 20°/s or 25°/s. In the static-views condition, the initial and most extreme views were presented as static images, with delay between images of 0.5s, 1.6s, 2.0s, or 2.4s. Observers adjusted the aspect ratio of a 2D ellipse to match the perceived shape of the elliptical face of the 3D object. For both the SFM and static-views conditions, we found that judgments were more accurate with large perspective change. With small perspective change, judgments showed overall underestimation of depth and compression of range. Large perspective change reduced these biases, and in the SFM condition judgments were close to veridical. Accuracy was lower with static-views than SFM, indicating that the improvement was not solely due to the extreme views. We found no effect of rotation speed even with small perspective change, contrary to expectations. We conclude that large perspective change can facilitate structure-from-motion and support near-veridical judgments of 3D shape.
DescriptionThis journal issue is meeting abstracts presented at VSS 2012
Open Access Journal
Poster Session - 3D perception: Stereopsis, motion, and other cues
Persistent Identifierhttp://hdl.handle.net/10722/153169
ISSN
2015 Impact Factor: 2.341
2015 SCImago Journal Rankings: 1.042

 

DC FieldValueLanguage
dc.contributor.authorLee, YLen_US
dc.contributor.authorSaunders, JAen_US
dc.date.accessioned2012-07-16T09:58:51Z-
dc.date.available2012-07-16T09:58:51Z-
dc.date.issued2012en_US
dc.identifier.citationThe 12th Annual Meeting of the Vision Sciences Society (VSS 2012), Naples, FL., 11-16 May 2012. In Journal of Vision, 2012, v. 12 n. 9, article 1042en_US
dc.identifier.issn1534-7362-
dc.identifier.urihttp://hdl.handle.net/10722/153169-
dc.descriptionThis journal issue is meeting abstracts presented at VSS 2012-
dc.descriptionOpen Access Journal-
dc.descriptionPoster Session - 3D perception: Stereopsis, motion, and other cues-
dc.description.abstractStudies of structure-from-motion have generally found that perceived depth from motion is not veridical and depends on speed. However, some recent studies have found that observers are capable of accurate metric judgments of shape when there are large changes in perspective (Bingham & Lind, 2008; Lee et al., 2008). We investigated whether continuous motion is required for accurate metric shape judgments from large perspective changes, and whether amount of perspective change modulates the speed dependence of structure-from-motion. Stimuli were views of elliptical cylinders with depth-to-width ratios (0.5-1.5) and with different slants in depth (top face: 60°, 70° or 80°). In the SFM condition, the object was rotated around the normal axis by either ±10° or ±45°. The rotation was sinusoidal with peak speed of either 15°/s, 20°/s or 25°/s. In the static-views condition, the initial and most extreme views were presented as static images, with delay between images of 0.5s, 1.6s, 2.0s, or 2.4s. Observers adjusted the aspect ratio of a 2D ellipse to match the perceived shape of the elliptical face of the 3D object. For both the SFM and static-views conditions, we found that judgments were more accurate with large perspective change. With small perspective change, judgments showed overall underestimation of depth and compression of range. Large perspective change reduced these biases, and in the SFM condition judgments were close to veridical. Accuracy was lower with static-views than SFM, indicating that the improvement was not solely due to the extreme views. We found no effect of rotation speed even with small perspective change, contrary to expectations. We conclude that large perspective change can facilitate structure-from-motion and support near-veridical judgments of 3D shape.-
dc.languageengen_US
dc.publisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/-
dc.relation.ispartofJournal of Visionen_US
dc.subjectMedical sciences-
dc.subjectOphthalmology and optometry-
dc.titlePerceived 3D shape from continuous and static perspective changesen_US
dc.typeConference_Paperen_US
dc.identifier.emailLee, YL: younglee@hku.hken_US
dc.identifier.emailSaunders, JA: jsaun@hkucc.hku.hken_US
dc.identifier.authorityLee, YL=rp00866en_US
dc.identifier.authoritySaunders, JA=rp00638en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1167/12.9.1042-
dc.identifier.hkuros201587en_US
dc.identifier.volume12-
dc.identifier.issue9-
dc.publisher.placeUnited States-
dc.description.otherThe 12th Annual Meeting of the Vision Sciences Society (VSS 2012), Naples, FL., 11-16 May 2012. In Journal of Vision, 2012, v. 12 n. 9, article 1042-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats