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Proceedings Paper

Visual sensitivity to color-varying stimuli
Author(s): Sarah A. Rajala; H. Joel Trussell; B. Krishnakumar
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Paper Abstract

We present the results of a study of the sensitivity of the human visual system (HVS) to spatially varying color stimuli. Sinusoidal grating patterns of different spatial frequencies were presented to six observers and the contrast required to just distinguish the pattern from the surrounding uniform field was determined. Tables and curves of contrast (measured in ΔELab) as a function of frequency were generated at different values of; the orientation (horizontal, vertical and diagonal) of the pattern, the average luminance, the x and y chromaticity co-ordinates, and the direction of the variation of the stimulus in color space (luminance, red-green, and blue-yellow). The results show that the HVS is more sensitive to sinusoidal gratings oriented horizontally and vertically regardless of the type of variation. Furthermore, the HVS is more sensitive to luminance variations than it is to chromatic variations. Tables and curves of the data are presented.

Paper Details

Date Published: 27 August 1992
PDF: 12 pages
Proc. SPIE 1666, Human Vision, Visual Processing, and Digital Display III, (27 August 1992); doi: 10.1117/12.135983
Show Author Affiliations
Sarah A. Rajala, North Carolina State Univ. (United States)
H. Joel Trussell, North Carolina State Univ. (United States)
B. Krishnakumar, North Carolina State Univ. (United States)


Published in SPIE Proceedings Vol. 1666:
Human Vision, Visual Processing, and Digital Display III
Bernice E. Rogowitz, Editor(s)

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