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Contributed talks II: Environmental calibration of perceived white.

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Color perception may adapt to an individual's visual environment. This study found that perceived white, or the brain's interpretation of white light, varied between Norwegians in Oslo and Tromsø, but not as expected based on their visual diets.

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Area of Science:

  • Visual Perception
  • Environmental Science
  • Colorimetry

Background:

  • Color perception is hypothesized to calibrate to environmental chromatic statistics.
  • The concept of 'perceived white' as a stable reference point is explored in relation to the visual environment.

Purpose of the Study:

  • To investigate if perceived white is calibrated to the local 'visual diet' (chromatic statistics of the environment).
  • To compare achromatic settings between participants in Norway (Oslo vs. Tromsø) and across seasons.
  • To examine the influence of early life visual environment (latitude and season of birth) on perceived white.

Main Methods:

  • Utilized head-mounted cameras to capture daily visual diets and compute average chromaticity and blue-yellow bias.
  • Compared perceived white settings of participants in Oslo (below Arctic Circle) and Tromsø (above Arctic Circle).
  • Analyzed perceived white in relation to season and birth location/season within the Tromsø group.

Main Results:

  • Perceived white was warmer and more blue-yellow biased in Oslo compared to Tromsø, contrary to visual diet data.
  • Visual diets were warmer and more blue-yellow biased in Tromsø than in Oslo.
  • Perceived white did not significantly vary with season, though visual diets were warmest in winter. Adults born at lower latitudes perceived whiter (lower S/(L+M)) and those born in summer perceived redder (higher L/(L+M)) white.

Conclusions:

  • Findings suggest a potential link between an individual's visual diet and their color perception, specifically perceived white.
  • The calibration of perceived white to the visual environment may be complex and not solely driven by current chromatic statistics.
  • Early life visual environment might play a role in shaping long-term color perception.