John S Werner, Carol M. Cicerone, Reinhold Kliegl, Denise DellaRosa

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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 prime annulus until a 45 prime 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 prime annulus.

Original languageEnglish (US)
Pages (from-to)981-986
Number of pages6
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number9
StatePublished - Sep 1984
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Medicine(all)


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