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  2. Mesopic vision - Wikipedia

    en.wikipedia.org/wiki/Mesopic_vision

    Mesopic vision, sometimes also called twilight vision, is a combination of photopic and scotopic vision under low-light (but not necessarily dark) conditions. [1] Mesopic levels range approximately from 0.01 to 3.0 cd/m 2 in luminance. Most nighttime outdoor and street lighting conditions are in the mesopic range. [2]

  3. Orders of magnitude (illuminance) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    Approximate scotopic/mesopic threshold [8] 10 −1: 10 0: cd/m 2: 2 cd/m 2: Floodlit buildings, monuments, and fountains [9] 10 1: 5 cd/m 2: Approximate mesopic/photopic threshold [8] 25 cd/m 2: Typical photographic scene at sunrise or sunset [7] 30 cd/m 2: Green electroluminescent source [5] 10 2: 55 cd/m 2: Standard SMPTE cinema screen ...

  4. Category:Graph, chart and plot templates - Wikipedia

    en.wikipedia.org/wiki/Category:Graph,_chart_and...

    [[Category:Graph, chart and plot templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Graph, chart and plot templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.

  5. Scotopic vision - Wikipedia

    en.wikipedia.org/wiki/Scotopic_vision

    Mesopic vision occurs in intermediate lighting conditions (luminance level 10 −3 to 10 0.5 cd/m 2) [citation needed] and is effectively a combination of scotopic and photopic vision. This gives inaccurate visual acuity and color discrimination. In normal light (luminance level 10 to 10 8 cd/m 2), the vision of cone cells dominates and is ...

  6. Tetrachromacy - Wikipedia

    en.wikipedia.org/wiki/Tetrachromacy

    The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.

  7. Monochromacy - Wikipedia

    en.wikipedia.org/wiki/Monochromacy

    In mesopic conditions, both rods and cones are active and opponent interactions between the cones and rods can afford slight color vision. [7] According to Jay Neitz, a color vision researcher at the University of Washington, each of the three standard color-detecting cones in the retina of trichromats can detect approximately 100 gradations of ...

  8. Photometry (optics) - Wikipedia

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

    The eye has different responses as a function of wavelength when it is adapted to light conditions (photopic vision) and dark conditions (scotopic vision). Photometry is typically based on the eye's photopic response, and so photometric measurements may not accurately indicate the perceived brightness of sources in dim lighting conditions where ...

  9. Luminous efficiency function - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficiency_function

    Luminosity for mesopic vision, a wide transitioning band between scotopic and phototic vision, is more poorly standardized. The consensus is that this luminous efficiency can be written as a weighted average of scotopic and mesopic luminosities, but different organizations provide different weighting factors.