Perceiving Illumination Inconsistencies in Scenes
The human visual system is adept at detecting and encoding statistical regularities in its spatio-temporal environment. Here we report an unexpected failure of this ability in the context of perceiving inconsistencies in illumination distributions across a scene. Contrary to predictions from previou...
| Main Authors: | , , |
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| Language: | en_US |
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2004
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| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/7243 |
| _version_ | 1826209745770381312 |
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| author | Ostrovsky, Yuri Cavanagh, Patrick Sinha, Pawan |
| author_facet | Ostrovsky, Yuri Cavanagh, Patrick Sinha, Pawan |
| author_sort | Ostrovsky, Yuri |
| collection | MIT |
| description | The human visual system is adept at detecting and encoding statistical regularities in its spatio-temporal environment. Here we report an unexpected failure of this ability in the context of perceiving inconsistencies in illumination distributions across a scene. Contrary to predictions from previous studies [Enns and Rensink, 1990; Sun and Perona, 1996a, 1996b, 1997], we find that the visual system displays a remarkable lack of sensitivity to illumination inconsistencies, both in experimental stimuli and in images of real scenes. Our results allow us to draw inferences regarding how the visual system encodes illumination distributions across scenes. Specifically, they suggest that the visual system does not verify the global consistency of locally derived estimates of illumination direction. |
| first_indexed | 2024-09-23T14:29:17Z |
| id | mit-1721.1/7243 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:29:17Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/72432019-04-10T11:52:48Z Perceiving Illumination Inconsistencies in Scenes Ostrovsky, Yuri Cavanagh, Patrick Sinha, Pawan AI Illumination natural scene perception lighting direction pop-out The human visual system is adept at detecting and encoding statistical regularities in its spatio-temporal environment. Here we report an unexpected failure of this ability in the context of perceiving inconsistencies in illumination distributions across a scene. Contrary to predictions from previous studies [Enns and Rensink, 1990; Sun and Perona, 1996a, 1996b, 1997], we find that the visual system displays a remarkable lack of sensitivity to illumination inconsistencies, both in experimental stimuli and in images of real scenes. Our results allow us to draw inferences regarding how the visual system encodes illumination distributions across scenes. Specifically, they suggest that the visual system does not verify the global consistency of locally derived estimates of illumination direction. 2004-10-20T21:03:57Z 2004-10-20T21:03:57Z 2001-11-05 AIM-2001-029 CBCL-209 http://hdl.handle.net/1721.1/7243 en_US AIM-2001-029 CBCL-209 13 p. 3418249 bytes 947913 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | AI Illumination natural scene perception lighting direction pop-out Ostrovsky, Yuri Cavanagh, Patrick Sinha, Pawan Perceiving Illumination Inconsistencies in Scenes |
| title | Perceiving Illumination Inconsistencies in Scenes |
| title_full | Perceiving Illumination Inconsistencies in Scenes |
| title_fullStr | Perceiving Illumination Inconsistencies in Scenes |
| title_full_unstemmed | Perceiving Illumination Inconsistencies in Scenes |
| title_short | Perceiving Illumination Inconsistencies in Scenes |
| title_sort | perceiving illumination inconsistencies in scenes |
| topic | AI Illumination natural scene perception lighting direction pop-out |
| url | http://hdl.handle.net/1721.1/7243 |
| work_keys_str_mv | AT ostrovskyyuri perceivingilluminationinconsistenciesinscenes AT cavanaghpatrick perceivingilluminationinconsistenciesinscenes AT sinhapawan perceivingilluminationinconsistenciesinscenes |