Introducing context-dependent and spatially-variant viewing biases in saccadic models.
Previous research showed the existence of systematic tendencies in viewing behavior during scene exploration. For instance, saccades are known to follow a positively skewed, long-tailed distribution, and to be more frequently initiated in the horizontal or vertical directions. In this study, we hypo...
| Published in: | Vision Research Vol. 121; pp. 72 - 85 |
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| Main Authors: | , |
| Format: | research Journal Article |
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Pergamon Press - An Imprint of Elsevier Science
Apr2016
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=114023016&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 114023016 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00426989 2FL jtl: Vision Research issn: 00426989 maglogo: N pubinfo: dt: Apr2016 vid: 121 pid: 2410 pub: Pergamon Press - An Imprint of Elsevier Science artinfo: ui: 114023016 114023016 NLM26898752 114023016 10.1016/j.visres.2016.01.005 NLM26898752 114023016 ppf: 72 ppct: 13 formats: tig: atl: Introducing context-dependent and spatially-variant viewing biases in saccadic models. aug: au: Le Meur, Olivier Coutrot, Antoine affil: IRISA University of Rennes 1, Campus Universitaire de Beaulieu, 35042 Rennes, France sug: subj: Saccades Physiology Visual Perception Physiology Models, Biological Eye Movement Measurements Bias (Research) Orientation Eye Movements Human ab: Previous research showed the existence of systematic tendencies in viewing behavior during scene exploration. For instance, saccades are known to follow a positively skewed, long-tailed distribution, and to be more frequently initiated in the horizontal or vertical directions. In this study, we hypothesize that these viewing biases are not universal, but are modulated by the semantic visual category of the stimulus. We show that the joint distribution of saccade amplitudes and orientations significantly varies from one visual category to another. These joint distributions are in addition spatially variant within the scene frame. We demonstrate that a saliency model based on this better understanding of viewing behavioral biases and blind to any visual information outperforms well-established saliency models. We also propose a saccadic model that takes into account classical low-level features and spatially-variant and context-dependent viewing biases. This model outperforms state-of-the-art saliency models, and provides scanpaths in close agreement with human behavior. The better description of viewing biases will not only improve current models of visual attention but could also influence many other applications such as the design of human-computer interfaces, patient diagnosis or image/video processing applications. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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