NEC PA231W Betriebsanweisung PDF herunterladen (Seite 48)

48 | SPECTRAVIEW II - USER’S GUIDE

Glossary

Achromatic – Neutral in color (having no hue).

Additive Primaries – Red, green, and blue light that when combined in different relative inten-

sities produces different colors. (See also Subtractive Primaries)

Backlight – the internal light source for a Liquid Crystal Display, such as uorescent lamps or

array of LEDs (Light Emitting Diodes).

Blackbody – A hypothetical object that absorbs all incident radiation, thus any radiation (e.g.

light) coming from a blackbody must be emitted from it and not reected.

Blackbody Radiator Locus – The curved formed when the color of light radiated from a black-

body is plotted at different temperatures on a color space such as CIE xyY.

Black Level – The luminance or “brightness” of black when displayed on the screen.

Calibration – The process of bringing a device such as a display monitor to an absolute stan-

dard to ensure consistency over time and with other similarly calibrated devices.

Candelas (cd) – An international unit of light intensity. Luminance can be described in units of

Candelas per meter squared (cd/m²) but is often referred to as just Candelas or Nits for sake of

brevity.

CIE – The Commission Internationale d’Eclairage (International Commission on Illumination).

An organization that sets many of the standards used in color and color measurement.

CIE Lab – A color space that is relative to a reference white point. The L value represents light-

ness, a represents Red/Green and b represents Yellow/Blue. Lab is almost perceptually uni-

form in that differences between colors expressed in Lab correlate to equally perceived color

differences.

CIE uv chromaticity coordinates – Coordinates in the CIE uv color space which are derived

directly from CIE xyY color space. CIE uv is more perceptually uniform than CIE xy.

CIE xy chromaticity coordinates – Coordinates in the CIE xyY color space representing color

independent of luminance.

CIE xyY – A standard color space in which the Y component represents luminance. The x and

y components represent color.

Color Gamut – (See Gamut)

Colorimeter – An optical measurement device used to measure color that responds to light by

separating it into red, green, and blue components.

Color Management System (CMS) – Software used to control the handling of color between

scanner, monitor, and printer. ColorSync is an example of a CMS used on the Macintosh. Mi-

crosoft Image Color Management (ICM) is an example of a CMS used on Windows systems.

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NEC PA231W Betriebsanweisung Seite 48