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URN: urn:nbn:de:kobv:517-opus-16897
URL: http://opus.kobv.de/ubp/volltexte/2008/1689/

Werner, John S. ; Cicerone, Carola M. ; Kliegl, Reinhold ; DellaRosa, Denise

Spectral efficiency of blackness induction

Dokument 1.pdf (1.532 KB) (SHA-1:ee7589e2bec2863fe2b6d74a74c967ef7e230951 )

Kurzfassung in Englisch

The spectral efficiency of blackness induction was measured in three normal trichromatic observers and in one deuteranomalous observer. The psychophysical task was to adjust the radiance of a monochromatic 60–120′ annulus until a 45′ central broadband field just turned black and its contour became indiscriminable from a dark surrounding gap that separated it from the annulus. The reciprocal of the radiance required to induce blackness with annulus wavelengths between 420 and 680 nm was used to define a spectral-efficiency function for the blackness component of the achromatic process. For each observer, the shape of this blackness-sensitivity function agreed with the spectral-efficiency function based on heterochromatic flicker photometry when measured with the same 60–120′ annulus. Both of these functions matched the Commission Internationale de l'Eclairage Vλ function except at short wavelengths. Ancillary measurements showed that the latter difference in sensitivity can be ascribed to nonuniformities of preretinal absorption, since the annular field excluded the central 60′ of the fovea. Thus our evidence indicates that, at least to a good first approximation, induced blackness is inversely related to the spectral-luminosity function. These findings are consistent with a model that separates the achromatic and the chromatic pathways.

Institut 1: Institut für Psychologie
Institut 2: Extern
DDC-Sachgruppe: Psychologie
Dokumentart: c Postprint
Schriftenreihe: Postprints der Universität Potsdam : Humanwissenschaftliche Reihe, ISSN 1866-8364
Bandnummer: paper 040
Quelle: Journal of the Optical Society of America A: Optics, Image Science, and Vision. - 1 (1984), 9, pp. 981-986. - ISSN (print) 1084-7529, ISSN (online) 0740-3232
Sprache: Englisch
Erstellungsjahr: 1984
Publikationsdatum: 17.09.2008
first published in:
Journal of the Optical Society of America A: Optics, Image Science, and Vision. - 1 (1984), 9, pp. 981-986
ISSN (print) 1084-7529
ISSN (online) 0740-3232
© 2007 Optical Society of America, Inc.
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