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Visualizing Visual Adaptation
Published on: April 24, 2017
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Defining the visual adaptation field for mesopic photometry: How does the high-luminance source affect peripheral
Tatsukiyo Uchida1,2, Yoshi Ohno2
1Panasonic Corporation, Osaka, Japan.
Lighting Research & Technology (London, England : 2001)
|July 10, 2024
Summary
The mesopic photometry system requires adaptation luminance, but the adaptation field is undefined. Vision experiments show surrounding luminance acts as veiling luminance, best modeled by Stiles and Crawford.
Area of Science:
- Photometry and Vision Science
Background:
- The CIE 191:2010 standard for mesopic photometry relies on adaptation luminance, but lacks a defined adaptation field.
- The surrounding luminance effect is crucial for defining this adaptation field.
Purpose of the Study:
- To investigate the surrounding luminance effect on peripheral visual adaptation.
- To determine if this effect can be modeled as veiling luminance and compare it to foveal effects.
Main Methods:
- Conducting vision experiments with a point source at varying intensities and positions.
- Measuring the impact of surrounding luminance on peripheral adaptation state.
Main Results:
- The surrounding luminance effect was quantified and described as veiling luminance.
- The magnitude of peripheral veiling luminance was found to be greater than foveal veiling luminance.
Conclusions:
- The Stiles and Crawford model (1937) effectively predicts the peripheral veiling luminance caused by surrounding luminance.
- Further research is needed to fully implement the mesopic photometry system by defining the adaptation field.
