The Trade-Off Between Luminance and Color Contrast Assessed With Pupil Responses.

ABSTRACT:

Purpose

A scene consisting of a white stimulus on a black background incorporates strong luminance contrast. When both stimulus and background receive different colors, luminance contrast decreases but color contrast increases. Here, we sought to characterize the pattern of stimulus salience across varying trade-offs of color and luminance contrasts by using the pupil light response.

Methods

Three experiments were conducted with 17, 16, and 17 healthy adults. For all experiments, a flickering stimulus (2 Hz; alternating color to black) was presented superimposed on a background with a complementary color to the stimulus (i.e., opponency colors in human color perception: blue and yellow for Experiment 1, red and green for Experiment 2, and equiluminant red and green for Exper

SUBMITTER: Portengen BL 

PROVIDER: S-EPMC9838585 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature