Introducing context-dependent and spatially-variant viewing biases in saccadic models

Vision Research
Olivier Le Meur, Antoine Coutrot

Abstract

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 de...Continue Reading

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Citations

Oct 16, 2016·Cognitive Processing·Yixiu WangLiming Zhang
Apr 15, 2017·Behavior Research Methods·Antoine CoutrotAntoni B Chan
Jul 7, 2017·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Olivier Le MeurAndrea Helo
Dec 24, 2019·Journal of Vision·Erwan Joël DavidPatrick Le Callet
Oct 3, 2020·Scientific Reports·Dario ZancaAlessandra Rufa
Jul 28, 2017·Journal of the Royal Society, Interface·Tatiana A AmorJosé S Andrade
Oct 10, 2020·PloS One·Olivier Le MeurRémi Cozot
Dec 3, 2020·Communications Biology·Lisa SchwetlickRalf Engbert
Apr 17, 2021·Frontiers in Neurorobotics·Alessandro D'Amelio, Giuseppe Boccignone
Nov 2, 2017··Andrea HeloAdrien Le Roch

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