Abstract
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 language | English (US) |
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Pages (from-to) | 981-986 |
Number of pages | 6 |
Journal | Journal of the Optical Society of America A: Optics and Image Science, and Vision |
Volume | 1 |
Issue number | 9 |
State | Published - Sep 1984 |
Externally published | Yes |
ASJC Scopus subject areas
- Engineering(all)
- Medicine(all)