Time will tell: Material surface cues for the visual perception of material ageing Insights from psychophysics, online experiments, image processing and a science festival

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dc.contributor.advisorBloj, Marina
dc.contributor.advisorDenniss, Jonathan
dc.contributor.advisorLogan, Andrew J.
dc.contributor.authorDe Korte, Elisabeth M.
dc.date.accessioned2024-02-14T14:31:42Z
dc.date.available2024-02-14T14:31:42Z
dc.date.awarded2022
dc.date.issued2022
dc.description.abstractThis thesis explores the visual perception of material change over time, a novel topic that has received little attention so far. We aimed to understand the material surface features and mental representations associated with material change over time by the human visual system, and possibly wider cognitive systems. To this end, we performed a series of experiments with varying methodologies. These included a psychophysics experiment, online experiments, and data collection during a science festival. The latter showed that the general public mentioned “Faded (colour)” most often to describe material change over time and that specific material surface change features clustered around specific materials. In another experiment, material type, but not colour or the geometrical distribution, had a significant effect on perceived material change. Other experiments partially contradicted this finding. It was found that perceived material type showed a significant, non-linear association with perceived material change, replicating earlier findings on the effect of material type. In contrast, material surface lightness, a constituent of colour, was associated with perceived material change. The same held for components of the geometrical distribution. They showed a minor contribution to the perception of material change, but a major one to perceived material type. Together, our findings suggest that the human visual system seems to use constituents of material surface colour as a cue to material change over time. The geometrical distribution seems to play a minor role. Although these contributions may vary with material type, as our findings showed that material type affected the perception of material change over time.en_US
dc.description.sponsorshipDyViTo (Dynamics in Vision and Touch) has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 765121en_US
dc.identifier.urihttp://hdl.handle.net/10454/19808
dc.language.isoenen_US
dc.publisher.departmentSchool of Optometry and Vision Science. Faculty of Life Sciencesen_US
dc.publisher.institutionUniversity of Bradfordeng
dc.rights<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>.eng
dc.subjectMaterial ageingen_US
dc.subjectVisual perceptionen_US
dc.subjectCrowd-sourcingen_US
dc.subjectPsychophysicsen_US
dc.subjectOnline studyen_US
dc.subjectImage statisticsen_US
dc.subjectEUen_US
dc.subjectH2020-MSCA-ITNen_US
dc.subjectMaterial surfacesen_US
dc.titleTime will tell: Material surface cues for the visual perception of material ageing Insights from psychophysics, online experiments, image processing and a science festivalen_US
dc.typeThesiseng
dc.type.qualificationleveldoctoralen_US
dc.type.qualificationnamePhDen_US
dspace.entity.typePublication
refterms.dateFOA2024-02-14T14:31:43Z
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