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  2. Luminous efficiency function - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficiency_function

    The CIE 1924 photopic V(λ) luminosity function, [cie 3] which is included in the CIE 1931 color-matching functions as the y (λ) function, has long been acknowledged to underestimate the contribution of the blue end of the spectrum to perceived luminance. There have been numerous attempts to improve the standard function, to make it more ...

  3. USA Memory Championship - Wikipedia

    en.wikipedia.org/wiki/USA_Memory_Championship

    There is now an online qualifier consisting of five events: two from the popular brain-training site Lumosity, and three events from the online memory competition website Memory League. The two events from Lumosity have typically been Memory Match Overdrive and Rotation Matrix, while the events from Memory League have been Images, Names, and ...

  4. 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).

  5. Luminosity - Wikipedia

    en.wikipedia.org/wiki/Luminosity

    Ned Wright's cosmology calculator calculates a luminosity distance for a redshift of 1 to be 6701 Mpc = 2×10 26 m giving a radio luminosity of 10 −26 × 4 π (2×10 26) 2 / (1 + 1) (1 + 2) = 6×10 26 W Hz −1. To calculate the total radio power, this luminosity must be integrated over the bandwidth of the emission.

  6. World Memory Championships - Wikipedia

    en.wikipedia.org/wiki/World_Memory_Championships

    The World Memory Championships is an organized competition of memory sports in which competitors memorize as much information as possible within a given period of time. [1] The championship has taken place annually since 1991, with the exception of 1992. [2] It was originated by Tony Buzan and co founded by Tony Buzan and Ray Keene. It ...

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  8. Gamma correction - Wikipedia

    en.wikipedia.org/wiki/Gamma_correction

    The display computer may use a color management engine to convert to a different color space (such as older Macintosh's γ = 1.8 color space) before putting pixel values into its video memory. The monitor may do its own gamma correction to match the CRT gamma to that used by the video system.

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