Color vision is form and object vision

John S Werner, Michael A. Webster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Color vision is inseparable from spatial vision. Chromatic and achromatic aspects of visual experience together subserve our perception of the forms of objects. This view is supported by physiological studies demonstrating that both color and luminance are carried along with form information on the same optic nerve fibers, albeit at different spatial scales. These scale differences can be summarized by contrast sensitivity functions measured with chromatic and achromatic spatial sinusoids, and may be illustrated by digitally filtered images that separate achromatic and chromatic variations. Analyses of the chromatic content of natural images also demonstrate a close link with the chromatic and spatial tuning of neural pathways. While characteristic properties of natural scenes can predict general characteristics of visual coding, color can vary widely across individual images, and thus could not be represented optimally by a fixed visual system. However, color coding is not fixed, but rather adjusts to both the average color and distribution of colors in scenes through processes of adaptation. Such adjustments may support color constancy and coding efficiency, and may also optimize detection and discrimination of colors that are novel in an image. Finally, the spatial properties of color-coding mechanisms are essential to our perception of figure and ground. Chromatic (border) contrast enhances the difference between figure and ground, while homogenization of object surfaces is facilitated by short-and long-range processes of assimilation and color spreading.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsR Chung, A Rodrigues
Pages10-15
Number of pages6
Volume4421
DOIs
StatePublished - 2001
Event9th Congress of the International Colour Association - Rochester, NY, United States
Duration: Jun 24 2001Jun 29 2001

Other

Other9th Congress of the International Colour Association
CountryUnited States
CityRochester, NY
Period6/24/016/29/01

Fingerprint

Color vision
color vision
color coding
Color
color
nerve fibers
sine waves
assimilation
homogenizing
luminance
borders
discrimination
coding
adjusting
tuning
optics
Luminance
Optics
Tuning

Keywords

  • Adaptation
  • Assimilation
  • Color and form
  • Color constancy
  • Color pathways
  • Contrast

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Werner, J. S., & Webster, M. A. (2001). Color vision is form and object vision. In R. Chung, & A. Rodrigues (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4421, pp. 10-15) https://doi.org/10.1117/12.464653

Color vision is form and object vision. / Werner, John S; Webster, Michael A.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / R Chung; A Rodrigues. Vol. 4421 2001. p. 10-15.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Werner, JS & Webster, MA 2001, Color vision is form and object vision. in R Chung & A Rodrigues (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4421, pp. 10-15, 9th Congress of the International Colour Association, Rochester, NY, United States, 6/24/01. https://doi.org/10.1117/12.464653
Werner JS, Webster MA. Color vision is form and object vision. In Chung R, Rodrigues A, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4421. 2001. p. 10-15 https://doi.org/10.1117/12.464653
Werner, John S ; Webster, Michael A. / Color vision is form and object vision. Proceedings of SPIE - The International Society for Optical Engineering. editor / R Chung ; A Rodrigues. Vol. 4421 2001. pp. 10-15
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