relative brightness

relative brightness
<12> относительная яркость; отношение диаметра объектива ОП к кратности

Сборный англо-русский словарь. . 2011.

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  • Brightness — is an attribute of visual perception in which a source appears to emit or reflect a given amount of light. In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an… …   Wikipedia

  • brightness level — noun the quality of being luminous; emitting or reflecting light its luminosity is measured relative to that of our sun • Syn: ↑luminosity, ↑brightness, ↑luminance, ↑luminousness, ↑light • Derivationally related forms: ↑ …   Useful english dictionary

  • brightness — noun 1. the location of a visual perception along a continuum from black to white (Freq. 11) • Ant: ↑dullness • Derivationally related forms: ↑bright • Hypernyms: ↑light, ↑lightness …   Useful english dictionary

  • Luminance (relative) — Relative luminance follows the photometric definition of luminance, but with the values normalized to 1 or 100 for a reference white [cite book | author = Poynton, Charles | title = Digital Video and HDTV: Algorithms and Interfaces | isbn = 1… …   Wikipedia

  • Sky brightness — This article is primarily about the brightness of the night sky. For daytime situations, please see Diffuse sky radiation and Rayleigh Scattering. The fact that the sky isn t absolutely dark at night can easily be observed. Were the sky (in the… …   Wikipedia

  • Strong (relative detectability) — In the contexts of signal detection and perception in science and technology, but also more generally, strong means intense, either relative to other signals of similar kind, or relative to the detection threshold of the measuring or observing… …   Wikipedia

  • Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …   Wikipedia

  • Rings of Neptune — The scheme of Neptune s ring moon system. Solid lines denote rings; dashed lines denote orbits of moons. The rings of Neptune consist primarily of five principal rings predicted in 1984 by André Brahic and imaged in 1989 by the Voyager 2… …   Wikipedia

  • colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which …   Universalium

  • Makemake (dwarf planet) — Makemake Makemake as seen by the Hubble Space Telescope Discovery Discovered by …   Wikipedia

  • albedo — /al bee doh/, n., pl. albedos. 1. Astron. the ratio of the light reflected by a planet or satellite to that received by it. 2. Meteorol. such a ratio for any part of the earth s surface or atmosphere. 3. the white, inner rind of a citrus fruit.… …   Universalium

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