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Что (кто) такое luminance - определение

PHOTOMETRIC MEASURE OF THE LUMINOUS INTENSITY PER AREA OF LIGHT TRAVELLING IN A GIVEN DIRECTION

Photometric brightness; Luminance factor; Luminance meter

Найдено результатов: 13

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

brightness

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.

https://en.wikipedia.org/wiki/Luminance

Relative luminance

RATIOMETRIC DEFINITION OF LUMINANCE

Luminance (colorimetry); Luminance (relative)

Relative luminance Y follows the photometric definition of luminance L including spectral weighting for human vision, but while luminance L is a measure of light in units such as cd/m^2, Relative luminance Y values are normalized as 0.0 to 1.

https://en.wikipedia.org/wiki/Relative_luminance

Orders of magnitude (luminance)

Orders of magnitude (Illuminace); Orders of magnitude (Illuminance); Orders of magnitude (luminance)

This page lists examples of luminances, measured in candelas per square metre and grouped by order of magnitude.

https://en.wikipedia.org/wiki/Orders_of_magnitude_(luminance)

Luma (video)

BRIGHTNESS IN AN IMAGE OR VIDEO; PART OF INFORMATION OR SIGNAL DESCRIBING THE BRIGHTNESS (SHADE OF GREY) BUT NOT COLOUR

Luminance (video)

In video, luma represents the brightness in an image (the "black-and-white" or achromatic portion of the image). Luma is typically paired with chrominance.

https://en.wikipedia.org/wiki/Luma_(video)

Lambert (unit)

UNIT OF LUMINANCE; 10000/Π CANDELAS PER SQUARE METRE

Lambert (luminance); Millilambert

The lambert (symbol L, la or Lb) is a non-SI metric unit of luminance named for Johann Heinrich Lambert (1728–1777), a Swiss mathematician, physicist and astronomer. A related unit of luminance, the foot-lambert, is used in the lighting, cinema and flight simulation industries.

https://en.wikipedia.org/wiki/Lambert_(unit)

Stilb (unit)

UNIT OF MEASUREMENT; 10⁴ CANDELA PER SQUARE METRE

Stilb (luminance); Stilb unit

The stilb (sb) is the CGS unit of luminance for objects that are not self-luminous. It is equal to one candela per square centimeter or 104 nits (candelas per square meter).

https://en.wikipedia.org/wiki/Stilb_(unit)

Luminance (disambiguation)

Luminance is a photometric measure of the density of luminous intensity in a given direction, measured in candela per square metre (cd/m2).

https://en.wikipedia.org/wiki/Luminance_(disambiguation)

LRGB

PHOTOGRAPHIC TECHNIQUE

LRGB, short for Luminance, Red, Green and Blue, is a photographic technique used in amateur astronomy for producing good quality color photographs by combining a high-quality black-and-white image with a lower-quality color image.A Simple Guide to the LRGB Technique

https://en.wikipedia.org/wiki/LRGB

Википедия

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.

https://en.wikipedia.org/wiki/Luminance