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  2. Luminous efficiency function - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficiency_function

    When not specified, the luminous efficiency function generally refers to the photopic luminous efficiency function. The CIE photopic luminous efficiency function y (λ) or V(λ) is a standard function established by the Commission Internationale de l'Éclairage (CIE) and standardized in collaboration with the ISO, [1] and may be used to convert ...

  3. CIE 1931 color space - Wikipedia

    en.wikipedia.org/wiki/CIE_1931_color_space

    A comparison between a typical normalized M cone's spectral sensitivity and the CIE 1931 luminosity function for a standard observer in photopic vision. In the CIE 1931 model, Y is the luminance, Z is quasi-equal to blue (of CIE RGB), and X is a mix of the three CIE RGB curves chosen to be nonnegative (see § Definition of the CIE XYZ color space).

  4. Photometry (optics) - Wikipedia

    en.wikipedia.org/wiki/Photometry_(optics)

    In modern photometry, the radiant power at each wavelength is weighted by a luminosity function that models human brightness sensitivity. Typically, this weighting function is the photopic sensitivity function, although the scotopic function or other functions may also be applied in the same way. The weightings are standardized by the CIE and ...

  5. Luminous flux - Wikipedia

    en.wikipedia.org/wiki/Luminous_flux

    The luminous flux accounts for the sensitivity of the eye by weighting the power at each wavelength with the luminosity function, which represents the eye's response to different wavelengths. The luminous flux is a weighted sum of the power at all wavelengths in the visible band. Light outside the visible band does not contribute.

  6. Photopic vision - Wikipedia

    en.wikipedia.org/wiki/Photopic_vision

    The 1931 CIE photopic luminosity function. The horizontal axis is wavelength in nm. The horizontal axis is wavelength in nm. Photopic vision is the vision of the eye under well-lit conditions ( luminance levels from 10 to 10 8 cd/m 2 ).

  7. Luminous efficiency function - en.wikipedia.org

    en.wikipedia.org/.../mobile-html/Luminosity_function

    There are two luminous efficiency functions in common use. For everyday light levels, the photopic luminosity function best approximates the response of the human eye. For low light levels, the response of the human eye changes, and the scotopic curve applies. The photopic curve is the CIE standard curve used in the CIE 1931 color space.

  8. International Commission on Illumination - Wikipedia

    en.wikipedia.org/wiki/International_Commission...

    The CIE 1931 colour space chromaticity diagram with wavelengths in nanometers.The colors depicted depend on the color space of the device on which the image is viewed.. The International Commission on Illumination (usually abbreviated CIE for its French name Commission internationale de l'éclairage) is the international authority on light, illumination, colour, and colour spaces.

  9. File:Comparison between CIE luminosity function and M cone ...

    en.wikipedia.org/wiki/File:Comparison_between...

    This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

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