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LUMINANCE CONTRAST [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-03-12

English

Subject field(s)
  • Meteorology
DEF

Ratio of the difference between the luminances of an object and its background to the luminance of the background.

French

Domaine(s)
  • Météorologie
DEF

Rapport de la différence des luminances du repère et de l'arrière-plan à la luminance de l'arrière-plan.

Spanish

Campo(s) temático(s)
  • Meteorología
DEF

Cociente entre la diferencia de la luminancia de un objeto y la de su fondo y la luminancia del fondo.

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Record 2 2002-02-21

English

Subject field(s)
  • Signalling and Illumination (Air Transport)
DEF

The smallest luminance contrast that permits an object to be visually identified with an accepted degree of clarity.

OBS

visual threshold of luminance contrast: term and definition officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Signalisation (Transport aérien)
DEF

[...] contraste de luminance le plus faible qui permet d'identifier visuellement un objet avec une clarté acceptable.

OBS

seuil visuel de contraste de luminance : terme et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Señales e iluminación (Transporte aéreo)
DEF

Contraste de luminancia mínimo que permite identificar visualmente un objeto con un grado aceptable de claridad.

OBS

umbral visual de contraste luminoso: término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

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Record 3 1998-03-20

English

Subject field(s)
  • Optics
OBS

Quantities defined by three specific formulae in which only the luminances of the objects being contrasted are entered as members. (cf. CIEVO, 1970, p. 122).

French

Domaine(s)
  • Optique
CONT

Objectivement et conventionnellement, on désigne sous le nom de «contraste de luminance» une grandeur définie par l'une [de trois formules] où n'interviennent que les luminances lumineuses [...] des deux réalisations dont on apprécie le contraste.

OBS

contraste de luminance : terme normalisé par l'AFNOR.

Key term(s)
  • contraste

Spanish

Save record 3

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