Color Vision: Representing Material Categories
We argue that one of the early goals of color vision is to distinguish one kind of material from another. Accordingly, we show that when a pair of image regions is such that one region has greater intensity at one wavelength than at another wavelength, and the second region has the opposite property...
| Hauptverfasser: | , |
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| Sprache: | en_US |
| Veröffentlicht: |
2004
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| Online Zugang: | http://hdl.handle.net/1721.1/5638 |
| _version_ | 1826194743407673344 |
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| author | Rubin, John M. Richards, W.A. |
| author_facet | Rubin, John M. Richards, W.A. |
| author_sort | Rubin, John M. |
| collection | MIT |
| description | We argue that one of the early goals of color vision is to distinguish one kind of material from another. Accordingly, we show that when a pair of image regions is such that one region has greater intensity at one wavelength than at another wavelength, and the second region has the opposite property, then the two regions are likely to have arisen from distinct materials in the scene. We call this material change circumstance the 'opposite slope sign condition.' With this criterion as a foundation, we construct a representation of spectral information that facilitates the recognition of material changes. Our theory has implications for both psychology and neurophysiology. In particular, Hering's notion of opponent colors and psychologically unique primaries, and Land's results in two-color projection can be interpreted as different aspects of the visual system's goal of categorizing materials. Also, the theory provides two basic interpretations of the function of double-opponent color cells described by neurophysiologists. |
| first_indexed | 2024-09-23T10:01:26Z |
| id | mit-1721.1/5638 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:01:26Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/56382019-04-12T08:26:50Z Color Vision: Representing Material Categories Rubin, John M. Richards, W.A. vision color vision Land's retinex theory opponent colorstheory categorical perception spectral reflectance surfacesproperties double-opponent cells We argue that one of the early goals of color vision is to distinguish one kind of material from another. Accordingly, we show that when a pair of image regions is such that one region has greater intensity at one wavelength than at another wavelength, and the second region has the opposite property, then the two regions are likely to have arisen from distinct materials in the scene. We call this material change circumstance the 'opposite slope sign condition.' With this criterion as a foundation, we construct a representation of spectral information that facilitates the recognition of material changes. Our theory has implications for both psychology and neurophysiology. In particular, Hering's notion of opponent colors and psychologically unique primaries, and Land's results in two-color projection can be interpreted as different aspects of the visual system's goal of categorizing materials. Also, the theory provides two basic interpretations of the function of double-opponent color cells described by neurophysiologists. 2004-10-01T20:17:52Z 2004-10-01T20:17:52Z 1984-05-01 AIM-764 http://hdl.handle.net/1721.1/5638 en_US AIM-764 37 p. 3245647 bytes 2543676 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | vision color vision Land's retinex theory opponent colorstheory categorical perception spectral reflectance surfacesproperties double-opponent cells Rubin, John M. Richards, W.A. Color Vision: Representing Material Categories |
| title | Color Vision: Representing Material Categories |
| title_full | Color Vision: Representing Material Categories |
| title_fullStr | Color Vision: Representing Material Categories |
| title_full_unstemmed | Color Vision: Representing Material Categories |
| title_short | Color Vision: Representing Material Categories |
| title_sort | color vision representing material categories |
| topic | vision color vision Land's retinex theory opponent colorstheory categorical perception spectral reflectance surfacesproperties double-opponent cells |
| url | http://hdl.handle.net/1721.1/5638 |
| work_keys_str_mv | AT rubinjohnm colorvisionrepresentingmaterialcategories AT richardswa colorvisionrepresentingmaterialcategories |