and luminance
1Luminance — 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… …
2Luminance (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… …
3Luminance — A&V The measurable, luminous intensity of a video signal. Differentiated from brightness in that the latter is nonrneasurable and sensory. The color video picture information contains two components: luminance (brightness and contrast) and… …
4luminance — F/A/V also called luma and abbreviated Y, it is part of a bandwidth limited video signal combining sync information and brightness information. TV Black and white portion of video signal, carries brightness information representingpicture… …
5luminance — /ˈlumənəns/ (say loohmuhnuhns) noun 1. the state or quality of being luminous. 2. Photometry (in a given direction, at a point on the surface of the source or the receptor, or at a point on the path of the beam) the luminous flux leaving,… …
6luminance — noun a) the quality of being luminous b) the luminous flux emitted in a given direction divided by the product of the projected area of the source element perpendicular to the direction and the solid angle containing that direction, i.e. luminous …
7HSL and HSV — Fig. 1. HSL (a–d) and HSV (e–h). Above (a, e): cut away 3D models of each. Below: two dimensional plots showing two of a model’s three parameters at once, holding the other constant: cylindrical shells (b, f) of constant saturation, in this case… …
84:4:2 (and 4:4:4) — VP Chroma sampling rates. 4:4:4 means that the colour and luminance components of the picture are sampled at the same rate, as is performed in cinematic postproduction. With 4:2:2, the two chroma components are sampled at half the rate of the… …
9Media and Publishing — ▪ 2007 Introduction The Frankfurt Book Fair enjoyed a record number of exhibitors, and the distribution of free newspapers surged. TV broadcasters experimented with ways of engaging their audience via the Internet; mobile TV grew; magazine… …
10Lambert (luminance) — The lambert (symbol L) is a unit of luminance named for Johann Heinrich Lambert (1728 1777), a German mathematician, physicist and astronomer. A related unit of luminance, the foot lambert, is used in the lighting, cinema and flight simulation… …
