Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance
Surface properties provide useful information for identifying objects and interacting with them. Effective utilization of this information, however, requires that the perception of object surface properties be relatively constant across changes in illumination and changes in object shape. Such const...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2011-12-01
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| Series: | i-Perception |
| Online Access: | https://doi.org/10.1068/i0480 |
| _version_ | 1818232621772046336 |
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| author | Maria Olkkonen David H Brainard |
| author_facet | Maria Olkkonen David H Brainard |
| author_sort | Maria Olkkonen |
| collection | DOAJ |
| description | Surface properties provide useful information for identifying objects and interacting with them. Effective utilization of this information, however, requires that the perception of object surface properties be relatively constant across changes in illumination and changes in object shape. Such constancy has been studied separately for changes in these factors. Here we ask whether the separate study of the illumination and shape effects is sufficient, by testing whether joint effects of illumination and shape changes can be predicted from the individual effects in a straightforward manner. We found large interactions between illumination and object shape in their effects on perceived glossiness. In addition, analysis of luminance histogram statistics could not account for the interactions. |
| first_indexed | 2024-12-12T11:09:12Z |
| format | Article |
| id | doaj.art-224e982d8e4248f6a65e9b996a5a00c9 |
| institution | Directory Open Access Journal |
| issn | 2041-6695 |
| language | English |
| last_indexed | 2024-12-12T11:09:12Z |
| publishDate | 2011-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | i-Perception |
| spelling | doaj.art-224e982d8e4248f6a65e9b996a5a00c92022-12-22T00:26:20ZengSAGE Publishingi-Perception2041-66952011-12-01210.1068/i048010.1068_i0480Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface ReflectanceMaria OlkkonenDavid H BrainardSurface properties provide useful information for identifying objects and interacting with them. Effective utilization of this information, however, requires that the perception of object surface properties be relatively constant across changes in illumination and changes in object shape. Such constancy has been studied separately for changes in these factors. Here we ask whether the separate study of the illumination and shape effects is sufficient, by testing whether joint effects of illumination and shape changes can be predicted from the individual effects in a straightforward manner. We found large interactions between illumination and object shape in their effects on perceived glossiness. In addition, analysis of luminance histogram statistics could not account for the interactions.https://doi.org/10.1068/i0480 |
| spellingShingle | Maria Olkkonen David H Brainard Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance i-Perception |
| title | Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance |
| title_full | Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance |
| title_fullStr | Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance |
| title_full_unstemmed | Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance |
| title_short | Joint Effects of Illumination Geometry and Object Shape in the Perception of Surface Reflectance |
| title_sort | joint effects of illumination geometry and object shape in the perception of surface reflectance |
| url | https://doi.org/10.1068/i0480 |
| work_keys_str_mv | AT mariaolkkonen jointeffectsofilluminationgeometryandobjectshapeintheperceptionofsurfacereflectance AT davidhbrainard jointeffectsofilluminationgeometryandobjectshapeintheperceptionofsurfacereflectance |