User's Guide

61 | NEC SPECTRAVIEW II - USER’S GUIDE
Gamma – The relationship between the input video signal to a display monitor and the screen out-
put luminance. Typically the screen luminance follows a mathematical power function of the input
video signal, the exponent of which is called the gamma.
Gamut – The range of colors that can be reproduced on a particular device such as a monitor or
printer, or that can be distinguished by a sensing device such as a scanner or the human eye.
Hue – The basic attribute of color such as red, green, yellow, blue or purple.
ICC – International Color Consortium, a color industry group working on standards for color man-
agement technology.
ICC Prole – A le conforming to the standards set by the ICC that contains a description of the
color characteristics of a device such as a monitor, printer, or scanner. In Windows, ICC proles
typically have the le extension “.icm”.
Image Color Management (ICM) – The Color Management System built into the Microsoft Win-
dows operating systems.
Intensity – Intensity species the luminance or brightness of white when displayed on the screen.
Kelvin – An absolute temperature scale denoted by K. Zero Kelvin (0K) is equivalent to –273°
Celsius.
Lab – (See CIE Lab)
LED – Light Emitting Diode.
LCD – Liquid Crystal Display.
Lightbox – An enclosure with controlled lighting conditions used to evaluate proofs, transparen-
cies and other printed materials. Typically a lightbox is illuminated to approximate a standard
illuminant such as D50 or D65.
Luminance – A measure of the brightness or intensity of light, usually expressed in units of Can-
delas per meter squared (cd/m²) or foot Lamberts.
Look Up Table (LUT) – A table used to translate input values to output values. SpectraView dis-
plays use 10 or 12 bit internal LUTs to apply Gamma corrections and Tone Response Curves.
MCS (Monitor Calibration Settings) le – A le used by SpectraView II to store the results of the
calibration, including the monitor settings and measurements.
Metamerism – A phenomenon in which two color samples appear to match in color under certain
lighting conditions but not in others.
MPCD (Minimum Perceptible Color Difference) – A unit of measure, developed by the CIE, to
dene the change in light and color required to be just noticeable to the human eye.
Nit – A unit of luminance equal to Candelas per meter squared (cd/m²).
NTSC – National Television Standards Committee. A standard for encoding video signals used
widely in North America and Japan.
PAL – Phase Alternation by Line. A standard for encoding video signals used in Western Europe
and parts of Asia.
Phosphors – Materials that emit light when struck by radiation of certain wavelengths. CRT dis-
plays use phosphors that give off red, green, and blue light to display an image on the screen.