Human vision is attuned to the diffuseness of natural light
Identifieur interne : 003233 ( Ncbi/Merge ); précédent : 003232; suivant : 003234Human vision is attuned to the diffuseness of natural light
Auteurs : Yaniv Morgenstern [États-Unis] ; Wilson S. Geisler [États-Unis] ; Richard F. Murray [Canada]Source :
- Journal of Vision [ 1534-7362 ] ; 2014.
Abstract
All images are highly ambiguous, and to perceive 3-D scenes, the human visual system relies on assumptions about what lighting conditions are most probable. Here we show that human observers' assumptions about lighting diffuseness are well matched to the diffuseness of lighting in real-world scenes. We use a novel multidirectional photometer to measure lighting in hundreds of environments, and we find that the diffuseness of natural lighting falls in the same range as previous psychophysical estimates of the visual system's assumptions about diffuseness. We also find that natural lighting is typically directional enough to override human observers' assumption that light comes from above. Furthermore, we find that, although human performance on some tasks is worse in diffuse light, this can be largely accounted for by intrinsic task difficulty. These findings suggest that human vision is attuned to the diffuseness levels of natural lighting conditions.
Url:
DOI: 10.1167/14.9.15
PubMed: 25139864
PubMed Central: 4141658
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Geisler</name><affiliation wicri:level="4"><nlm:aff id="aff2">Department of Psychology and Center for Perceptual Systems, University of Texas at Austin, Austin, TX, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Psychology and Center for Perceptual Systems, University of Texas at Austin, Austin, TX</wicri:regionArea><placeName><region type="state">Texas</region></placeName><orgName type="university">Université du Texas à Austin</orgName></affiliation></author><author><name sortKey="Murray, Richard F" sort="Murray, Richard F" uniqKey="Murray R" first="Richard F." last="Murray">Richard F. Murray</name><affiliation wicri:level="1"><nlm:aff id="aff3">Department of Psychology and Centre for Vision Research, York University, Toronto, ON, Canada</nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Psychology and Centre for Vision Research, York University, Toronto, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">25139864</idno><idno type="pmc">4141658</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141658</idno><idno type="RBID">PMC:4141658</idno><idno type="doi">10.1167/14.9.15</idno><date when="2014">2014</date><idno type="wicri:Area/Pmc/Corpus">001491</idno><idno type="wicri:Area/Pmc/Curation">001491</idno><idno type="wicri:Area/Pmc/Checkpoint">000B94</idno><idno type="wicri:Area/Ncbi/Merge">003233</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Human vision is attuned to the diffuseness of natural light</title><author><name sortKey="Morgenstern, Yaniv" sort="Morgenstern, Yaniv" uniqKey="Morgenstern Y" first="Yaniv" last="Morgenstern">Yaniv Morgenstern</name><affiliation wicri:level="2"><nlm:aff id="aff1">Department of Psychology, University of Minnesota, Minneapolis, MN, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Psychology, University of Minnesota, Minneapolis, MN</wicri:regionArea><placeName><region type="state">Minnesota</region></placeName></affiliation></author><author><name sortKey="Geisler, Wilson S" sort="Geisler, Wilson S" uniqKey="Geisler W" first="Wilson S." last="Geisler">Wilson S. Geisler</name><affiliation wicri:level="4"><nlm:aff id="aff2">Department of Psychology and Center for Perceptual Systems, University of Texas at Austin, Austin, TX, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Psychology and Center for Perceptual Systems, University of Texas at Austin, Austin, TX</wicri:regionArea><placeName><region type="state">Texas</region></placeName><orgName type="university">Université du Texas à Austin</orgName></affiliation></author><author><name sortKey="Murray, Richard F" sort="Murray, Richard F" uniqKey="Murray R" first="Richard F." last="Murray">Richard F. Murray</name><affiliation wicri:level="1"><nlm:aff id="aff3">Department of Psychology and Centre for Vision Research, York University, Toronto, ON, Canada</nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Psychology and Centre for Vision Research, York University, Toronto, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author></analytic><series><title level="j">Journal of Vision</title><idno type="eISSN">1534-7362</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>All images are highly ambiguous, and to perceive 3-D scenes, the human visual system relies on assumptions about what lighting conditions are most probable. Here we show that human observers' assumptions about lighting diffuseness are well matched to the diffuseness of lighting in real-world scenes. We use a novel multidirectional photometer to measure lighting in hundreds of environments, and we find that the diffuseness of natural lighting falls in the same range as previous psychophysical estimates of the visual system's assumptions about diffuseness. We also find that natural lighting is typically directional enough to override human observers' assumption that light comes from above. Furthermore, we find that, although human performance on some tasks is worse in diffuse light, this can be largely accounted for by intrinsic task difficulty. These findings suggest that human vision is attuned to the diffuseness levels of natural lighting conditions.</p></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Vis</journal-id><journal-id journal-id-type="iso-abbrev">J Vis</journal-id><journal-id journal-id-type="hwp">jov</journal-id><journal-id journal-id-type="pmc">jov</journal-id><journal-id journal-id-type="publisher-id">JOV</journal-id><journal-title-group><journal-title>Journal of Vision</journal-title></journal-title-group><issn pub-type="epub">1534-7362</issn><publisher><publisher-name>The Association for Research in Vision and Ophthalmology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">25139864</article-id><article-id pub-id-type="pmc">4141658</article-id><article-id pub-id-type="doi">10.1167/14.9.15</article-id><article-id pub-id-type="sici">jovi-14-08-22</article-id><article-id pub-id-type="other">MS#: JOV-04173-2014</article-id><article-categories><subj-group subj-group-type="heading"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Human vision is attuned to the diffuseness of natural light</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Morgenstern</surname><given-names>Yaniv</given-names></name><xref ref-type="aff" rid="aff1">1</xref><email>yaniv.morgenstern@gmail.com</email></contrib><contrib contrib-type="author"><name><surname>Geisler</surname><given-names>Wilson S.</given-names></name><xref ref-type="aff" rid="aff2">2</xref><email>geisler@psy.utexas.edu</email><uri xlink:type="simple" xlink:href="http://www.utexas.edu/cola/depts/psychology/faculty/wsg8">http://www.utexas.edu/cola/depts/psychology/faculty/wsg8</uri></contrib><contrib contrib-type="author"><name><surname>Murray</surname><given-names>Richard F.</given-names></name><xref ref-type="aff" rid="aff3">3</xref><email>rfm@yorku.ca</email><uri xlink:type="simple" xlink:href="http://www.yorku.ca/rfm/">http://www.yorku.ca/rfm/</uri></contrib><aff id="aff1"><label>1</label>Department of Psychology, University of Minnesota, Minneapolis, MN, USA</aff><aff id="aff2"><label>2</label>Department of Psychology and Center for Perceptual Systems, University of Texas at Austin, Austin, TX, USA</aff><aff id="aff3"><label>3</label>Department of Psychology and Centre for Vision Research, York University, Toronto, ON, Canada</aff></contrib-group><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>19</day><month>8</month><year>2014</year></pub-date><volume>14</volume><issue>9</issue><elocation-id>15</elocation-id><history><date date-type="received"><day>11</day><month>3</month><year>2014</year></date><date date-type="accepted"><day>12</day><month>6</month><year>2014</year></date></history><permissions><copyright-statement>© 2014 ARVO</copyright-statement><copyright-year>2014</copyright-year></permissions><self-uri xlink:title="pdf" xlink:type="simple" xlink:href="i1534-7362-14-9-15.pdf"></self-uri><self-uri xlink:role="icon" xlink:type="simple" xlink:href="14.9.15.gif"></self-uri><abstract><p>All images are highly ambiguous, and to perceive 3-D scenes, the human visual system relies on assumptions about what lighting conditions are most probable. Here we show that human observers' assumptions about lighting diffuseness are well matched to the diffuseness of lighting in real-world scenes. We use a novel multidirectional photometer to measure lighting in hundreds of environments, and we find that the diffuseness of natural lighting falls in the same range as previous psychophysical estimates of the visual system's assumptions about diffuseness. We also find that natural lighting is typically directional enough to override human observers' assumption that light comes from above. Furthermore, we find that, although human performance on some tasks is worse in diffuse light, this can be largely accounted for by intrinsic task difficulty. These findings suggest that human vision is attuned to the diffuseness levels of natural lighting conditions.</p></abstract><kwd-group><title>Keywords</title><kwd><italic>lightness</italic></kwd><kwd><italic>prior</italic></kwd><kwd><italic>lighting statistics</italic></kwd><kwd><italic>diffuseness</italic></kwd><kwd><italic>ideal observer</italic></kwd></kwd-group></article-meta></front></pmc><affiliations><list><country><li>Canada</li><li>États-Unis</li></country><region><li>Minnesota</li><li>Texas</li></region><orgName><li>Université du Texas à Austin</li></orgName></list><tree><country name="États-Unis"><region name="Minnesota"><name sortKey="Morgenstern, Yaniv" sort="Morgenstern, Yaniv" uniqKey="Morgenstern Y" first="Yaniv" last="Morgenstern">Yaniv Morgenstern</name></region><name sortKey="Geisler, Wilson S" sort="Geisler, Wilson S" uniqKey="Geisler W" first="Wilson S." last="Geisler">Wilson S. Geisler</name></country><country name="Canada"><noRegion><name sortKey="Murray, Richard F" sort="Murray, Richard F" uniqKey="Murray R" first="Richard F." last="Murray">Richard F. Murray</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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