Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Changes in Brightness Index, Saturation, and Hue Produced by Luminance–Wavelength–Temporal Interactions

Not Accessible

Your library or personal account may give you access

Abstract

Measurement of the brightness, hue, and saturation produced by three different narrow spectral bands having dominant wavelengths of 500, 580, and 660 mμ, was made with intermittent inputs having a rate of 9.8 cps. The PCF (pulse-to-cycle fraction) was 14, and the luminance ranged from 3319 candles/ft2 down to 0.3 candle/ft2. At the higher luminance levels, the 500-mμ waveband produced the greatest brightness; the 660-mμ waveband, the lowest; and the 580-mμ waveband, an intermediate effect. As luminance decreased, the three bands finally became about equally effective around 30 candles/ft2. A range of 200 to 30 candles/ft2 manifested the greatest brightness index. Whereas brightness was above expectations under some conditions, it fell below expectations under others.

The intermittent inputs also produced hue changes and desaturation. Only the 500-mμ band produced large desaturation. When the 660-mμ waveband was used and when luminance was high, hue shifts were toward colors expected of the shorter wavelengths. Only one subject experienced hue shifts for the 580-mμ band; three of the four subjects obtained hue shifts for the 500-mμ band. The results here were complex.

© 1966 Optical Society of America

Full Article  |  PDF Article
More Like This
Analysis of Photopic and Scotopic Function in an Incomplete Achromat*

Irwin M. Siegel, Clarence H. Graham, Harris Ripps, and Yun Hsia
J. Opt. Soc. Am. 56(5) 699-704 (1966)

Luminance, not brightness, determines temporal brightness enhancement with chromatic stimuli

Richard W. Bowen and Mary Jo Nissen
J. Opt. Soc. Am. 69(4) 581-584 (1979)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved