Human observers compensate for secondary illumination originating in nearby chromatic surfaces

Katja Doerschner, Huseyin Boyaci, Laurence T. Maloney

Research output: Contribution to journalArticle

Abstract

In complex scenes, the light absorbed and re-emitted by one surface can serve as a source of illumination for a second. We examine whether observers systematically discount this secondary illumination when estimating surface color. We asked six naïve observers to make achromatic settings of a small test patch adjacent to a brightly colored orange cube in rendered scenes. The orientation of the test patch with respect to the cube was varied from trial to trial, altering the amount of secondary illumination reaching the test patch. Observers systematically took orientation into account in making their settings, discounting the added secondary illumination more at orientations where it was more intense. Overall, they tended to under-compensate for the added secondary illumination.

Original languageEnglish (US)
Pages (from-to)92-105
Number of pages14
JournalJournal of Vision
Volume4
Issue number2
DOIs
StatePublished - Feb 27 2004

Fingerprint

Lighting
Color
Patch Tests
Light

Keywords

  • Inter-reflection
  • Mutual illumination
  • Surface color perception

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Human observers compensate for secondary illumination originating in nearby chromatic surfaces. / Doerschner, Katja; Boyaci, Huseyin; Maloney, Laurence T.

In: Journal of Vision, Vol. 4, No. 2, 27.02.2004, p. 92-105.

Research output: Contribution to journalArticle

@article{c14782f6cfde450b8ca4ce66ddeaf277,
title = "Human observers compensate for secondary illumination originating in nearby chromatic surfaces",
abstract = "In complex scenes, the light absorbed and re-emitted by one surface can serve as a source of illumination for a second. We examine whether observers systematically discount this secondary illumination when estimating surface color. We asked six na{\"i}ve observers to make achromatic settings of a small test patch adjacent to a brightly colored orange cube in rendered scenes. The orientation of the test patch with respect to the cube was varied from trial to trial, altering the amount of secondary illumination reaching the test patch. Observers systematically took orientation into account in making their settings, discounting the added secondary illumination more at orientations where it was more intense. Overall, they tended to under-compensate for the added secondary illumination.",
keywords = "Inter-reflection, Mutual illumination, Surface color perception",
author = "Katja Doerschner and Huseyin Boyaci and Maloney, {Laurence T.}",
year = "2004",
month = "2",
day = "27",
doi = "10.1167/4.2.3",
language = "English (US)",
volume = "4",
pages = "92--105",
journal = "Journal of Vision",
issn = "1534-7362",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "2",

}

TY - JOUR

T1 - Human observers compensate for secondary illumination originating in nearby chromatic surfaces

AU - Doerschner, Katja

AU - Boyaci, Huseyin

AU - Maloney, Laurence T.

PY - 2004/2/27

Y1 - 2004/2/27

N2 - In complex scenes, the light absorbed and re-emitted by one surface can serve as a source of illumination for a second. We examine whether observers systematically discount this secondary illumination when estimating surface color. We asked six naïve observers to make achromatic settings of a small test patch adjacent to a brightly colored orange cube in rendered scenes. The orientation of the test patch with respect to the cube was varied from trial to trial, altering the amount of secondary illumination reaching the test patch. Observers systematically took orientation into account in making their settings, discounting the added secondary illumination more at orientations where it was more intense. Overall, they tended to under-compensate for the added secondary illumination.

AB - In complex scenes, the light absorbed and re-emitted by one surface can serve as a source of illumination for a second. We examine whether observers systematically discount this secondary illumination when estimating surface color. We asked six naïve observers to make achromatic settings of a small test patch adjacent to a brightly colored orange cube in rendered scenes. The orientation of the test patch with respect to the cube was varied from trial to trial, altering the amount of secondary illumination reaching the test patch. Observers systematically took orientation into account in making their settings, discounting the added secondary illumination more at orientations where it was more intense. Overall, they tended to under-compensate for the added secondary illumination.

KW - Inter-reflection

KW - Mutual illumination

KW - Surface color perception

UR - http://www.scopus.com/inward/record.url?scp=1542402229&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1542402229&partnerID=8YFLogxK

U2 - 10.1167/4.2.3

DO - 10.1167/4.2.3

M3 - Article

VL - 4

SP - 92

EP - 105

JO - Journal of Vision

JF - Journal of Vision

SN - 1534-7362

IS - 2

ER -