What image features guide lightness perception?

dc.contributor.authorKim, Minjung
dc.contributor.authorGold, Jason M.
dc.contributor.authorMurray, Richard F.
dc.date.accessioned2020-03-11T19:50:57Z
dc.date.available2020-03-11T19:50:57Z
dc.date.issued2018-12-04
dc.description.abstractLightness constancy is the ability to perceive black and white surface colors under a wide range of lighting conditions. This fundamental visual ability is not well understood, and current theories differ greatly on what image features are important for lightness perception. Here we measured classification images for human observers and four models of lightness perception to determine which image regions influenced lightness judgments. The models were a high-pass-filter model, an oriented difference-of-Gaussians model, an anchoring model, and an atmospheric-link-function model. Human and model observers viewed three variants of the argyle illusion (Adelson, 1993) and judged which of two test patches appeared lighter. Classification images showed that human lightness judgments were based on local, anisotropic stimulus regions that were bounded by regions of uniform lighting. The atmospheric-link-function and anchoring models predicted the lightness illusion perceived by human observers, but the high-pass-filter and oriented-difference-of-Gaussians models did not. Furthermore, all four models produced classification images that were qualitatively different from those of human observers, meaning that the model lightness judgments were guided by different image regions than human lightness judgments. These experiments provide a new test of models of lightness perception, and show that human observers' lightness computations can be highly local, as in low-level models, and nevertheless depend strongly on lighting boundaries, as suggested by midlevel models.en_US
dc.description.sponsorshipYork University Librariesen_US
dc.identifier.citationJournal of Vision 18.13 (2018): 1, 1–20.en_US
dc.identifier.urihttps://doi.org/10.1167/18.13.1en_US
dc.identifier.urihttps://hdl.handle.net/10315/37104
dc.language.isoenen_US
dc.publisherAssociation for Research in Vision and Ophthalmology (ARVO)en_US
dc.rightsAttribution 2.5 Canada*
dc.rights.articlehttp://jov.arvojournals.org/article.aspx?articleid=2717770en_US
dc.rights.journalhttp://jov.arvojournals.org/en_US
dc.rights.publisherhttps://arvojournals.org/index.aspxen_US
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/ca/*
dc.subjectlightnessen_US
dc.subjectargyle illusionen_US
dc.subjectclassification imagesen_US
dc.titleWhat image features guide lightness perception?en_US
dc.typeArticleen_US

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