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Understanding Lightness and Brightness in Different Media

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dc.contributor.advisorMurray, Richard F.
dc.contributor.authorPatel, Jaykishan Yogeshbhai
dc.date.accessioned2022-03-03T14:25:06Z
dc.date.available2022-03-03T14:25:06Z
dc.date.copyright2021-12
dc.date.issued2022-03-03
dc.date.updated2022-03-03T14:25:06Z
dc.degree.disciplinePsychology(Functional Area: Brain, Behaviour & Cognitive Sciences
dc.degree.levelMaster's
dc.degree.nameMA - Master of Arts
dc.description.abstractThis thesis aimed to study how lightness and brightness perception relate to each other. We used a simple task to study whether observers perceive lightness and brightness to be different percepts and what cues they use to make these judgments. In Experiment 1, we used a custom-built apparatus to present two reflectance patches, each with independent illuminance. In the lightness and brightness conditions, observers judged which patch had a higher reflectance or luminance, respectively. In Experiment 2, we repeated the same procedure using a computer rendering of the apparatus on a monitor. Finally, we simulated computational models of lightness and brightness to evaluate their performance with respect to observer performance. We conclude that (a) lightness and brightness judgments are more similar than expected from previous work, (b) brightness is nothing like an estimate of luminance, and (c) current computational models can fail on even simple lightness and brightness judgments.
dc.identifier.urihttp://hdl.handle.net/10315/39152
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectPsychology
dc.subject.keywordsLightness
dc.subject.keywordsBrightness
dc.subject.keywordsLightness constancy
dc.titleUnderstanding Lightness and Brightness in Different Media
dc.typeElectronic Thesis or Dissertation

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