Details

Autor(en) / Beteiligte

• Foster, David H.
• Sérgio M. C. Nascimento
• Amano, Kinjiro
• Arend, Larry
• Linnell, Karina J.
• Nieves, Juan Luis
• Plet, Sabrina
• Foster, Jeffrey S.

Titel

Parallel Detection of Violations of Color Constancy

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 2001-07, Vol.98 (14), p.8151-8156

Ort / Verlag

United States: National Academy of Sciences

Erscheinungsjahr

2001

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• The perceived colors of reflecting surfaces generally remain stable despite changes in the spectrum of the illuminating light. This color constancy can be measured operationally by asking observers to distinguish illuminant changes on a scene from changes in the reflecting properties of the surfaces comprising it. It is shown here that during fast illuminant changes, simultaneous changes in spectral reflectance of one or more surfaces in an array of other surfaces can be readily detected almost independent of the numbers of surfaces, suggesting a preattentive, spatially parallel process. This process, which is perfect over a spatial window delimited by the anatomical fovea, may form an early input to a multistage analysis of surface color, providing the visual system with information about a rapidly changing world in advance of the generation of a more elaborate and stable perceptual representation.