O que (quem) é luminance - definição
PHOTOMETRIC MEASURE OF THE LUMINOUS INTENSITY PER AREA OF LIGHT TRAVELLING IN A GIVEN DIRECTION
Photometric brightness; Luminance factor; Luminance meter
luminance
['lu:m?n(?)ns]
¦ noun
1. Physics the intensity of light emitted from a surface per unit area in a given direction.
2. the component of a television signal which carries information on the brightness of the image.
Origin
C19: from L. luminant- luminare 'illuminate' + -ance.
luminance
Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle.
Wikipédia
Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle.
Brightness is the term for the subjective impression of the objective luminance measurement standard (see Objectivity (science) § Objectivity in measurement for the importance of this contrast).
The SI unit for luminance is candela per square metre (cd/m2). A non-SI term for the same unit is the nit. The unit in the Centimetre–gram–second system of units (CGS) (which predated the SI system) is the stilb, which is equal to one candela per square centimetre or 10 kcd/m2.
