luminance ratio
31Visual display unit — A visual display unit, often called simply a monitor or display, is a piece of electrical equipment which displays images generated from the video output of devices such as computers, without producing a permanent record. A newer monitor… …
32photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
33Composite video — Not to be confused with Component video. Composite video On consumer products a yellow RCA connector is typically used for composite video. Type Analog video connector …
34Color Graphics Adapter — The 640×200 2 color mode with its default foreground color Arachne Internet suite. The Color Graphics Adapter (CGA), originally also called the Color/Graphics Adapter or IBM Color/Graphics Monitor Adapter,[1] introduced in 1981, was IBM s first… …
35Candela per square metre — Nit (unit) redirects here. For the unit of information entropy, see Nat (information). The candela per square metre (cd/m2) is the derived SI unit of luminance. The unit is based on the candela, the SI unit of luminous intensity, and the square… …
36Film speed — is the measure of a photographic film s sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to measure the sensitivity of digital… …
37Unités de mesures issues d'un anthroponyme — Les unités de mesures constituent une classe de noms communs souvent issus d un anthroponyme. Le plus souvent le nom de l unité de mesure est formé à partir du nom de scientifique qui l a utilisée en premier, ou, plus généralement d un… …
38Rec. 601 — ITU R Recommendation BT.601, more commonly know by the abbreviations Rec. 601 or BT.601 (or its former name, CCIR 601,) is a standard published by International Telecommunication Union Radiocommunications sector (formerly CCIR) for encoding… …
39Grating — A grating is any regularly spaced collection of essentially identical, parallel, elongated elements. Gratings usually consist of a single set of elongated elements, but can consist of two sets, in which case the second set is usually… …
40Foot-lambert — A foot lambert or footlambert (fL, sometimes fl or ft L) is a unit of luminance in U.S. customary units and elsewhere. A foot lambert equals 1/pi candela per square foot, or 3.4262591 candelas per square meter (nits). It is named after Johann… …
