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Leedjia A. Svec, Sarah Elliot, Jenny Highsmith, Tyson Brunstetter, Mike Crognale; The effect of spectrally selective filters on perception. Journal of Vision 2005;5(8):267. doi: 10.1167/5.8.267.
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© ARVO (1962-2015); The Authors (2016-present)
Under many circumstances the spectral composition of our visual world is purposefully filtered. For example, military pilots, industrial safety inspectors and workers, and participants in mountain or undersea activities often utilize spectrally selective filters. Such filters create a novel spectral environment that the visual system must adapt to and contend with. Though the physical and visual response to a given filter should be predictable from current models of color and contrast adaptation. Such predictions are not always supported by measures of performance. This study examined and compared the theoretical and actual visual performance of subjects using spectrally selective filters. The theoretical experience was obtained by using established mathematical models of vision to calculate the visual response toward a given filter and stimuli. The actual effects of spectrally selective filters on visual capacity were measured by testing human subjects on a battery of color vision tests while wearing filters. The discrepancy between theoretical and actual experience of wearing filters was analyzed individually for each test, for each filter. It was found that theoretical models are not adequate for all stimuli. Filters appeared to be affected by aperture stimuli more than object stimuli resulting in an alteration of color perception for most subjects. While these results in part support the accuracy of low-level theoretical models, they also show the inability to describe visual processes of color appearance at higher, perceptual levels. The application of higher-level models that include color constancy will be discussed.
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