Y (luminance)

Y (luminance)
• The luminance (brightness) portion of a video signal, especially component video. The formula for deriving & from the red, green, and blue signals is 0.30 R + 0.59 G + 0.11 B.
• Admittance, which is the reciprocal of impedance, the ease with which alternating current flows through a circuit.

Audio and video glossary. 2014.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Luminance — is a photometric measure of the density of luminous intensity in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is… …   Wikipedia

  • luminance — [ lyminɑ̃s ] n. f. • 1948; du rad. de lumineux ♦ Phys. Quotient de l intensité lumineuse d une surface par l aire apparente de cette surface pour un observateur lointain (exprimé en candela par mètre carré). ⇒ brillance. ● luminance nom féminin… …   Encyclopédie Universelle

  • Luminance HDR — Programm für HDR Workflow …   Deutsch Wikipedia

  • Luminance HDR — Qtpfsgui 1.9.1 …   Wikipédia en Français

  • Luminance (disambiguation) — Luminance may refer to:*Luminance, a photometric measure of the density of luminous intensity in a given direction *Luminance (relative), luminance normalized with respect to a reference white *Luma (video), an approximation of relative luminance …   Wikipedia

  • luminance signal — noun A signal controlling the luminance of a colour TV picture, ie its image brightness, as distinct from its chrominance • • • Main Entry: ↑luminous …   Useful english dictionary

  • luminance — luminousness, 1862, from L. luminantem (nom. luminans), prp. of luminare (see LUMINARY (Cf. luminary)) …   Etymology dictionary

  • luminance — [lo͞o′mə nəns] n. [< L lumen (gen. luminis), LIGHT1 + ANCE] 1. the quality or state of being luminous 2. a measure of the brightness of a luminous surface, measured in candelas per unit area …   English World dictionary

  • Luminance — En physique, la luminance est l intensité d une source étendue dans une direction donnée, divisée par l aire apparente de cette source dans cette même direction. Ne pas confondre la luminance tout court, qui est une grandeur photométrique… …   Wikipédia en Français

  • 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

  • luminance d'image — vaizdo skaistis statusas T sritis radioelektronika atitikmenys: angl. image brightness; image luminance vok. Bildhelligkeit, f; Bildleuchtdichte, f rus. яркость изображения, f pranc. luminance d image, f …   Radioelektronikos terminų žodynas

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”