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45 | MULTIPROFILER - USER’S GUIDE
Glossary
3D Look Up Table (LUT)
–
A three dimensional table used to translate input colors to output col-
ors. The dimensions of the table represent red, green and blue.
Achromatic
–
Neutral in color (having no hue).
Additive Primaries
–
Red, green, and blue light that when combined in different relative intensi-
ties, produces different colors. (See also Subtractive Primaries)
Backlight – the internal light source for a Liquid Crystal Display, such as fluorescent lamps or ar-
ray 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 reflected.
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 monitor to an absolute standard to en-
sure 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/m
²
) 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 uniform 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 Module (CMM) – See CMS.