Glossary of Terms
AdobeRGB
Default color space for computer displays.
Ambient Light
Light from any source, other than the display, that reaches the screen surface.
Brightness
Amount of light radiating from the screen.
Calibrate
To measure and correct by comparison with a standard, of the correct value or each
reading on a measuring instrument.
Candela
Basic unit of luminous intensity.
Color Temperature
Measurement of the color of white light, expressed in degrees Kelvin. The color
temperature is the color of light a perfect black-body radiator emits when heated to
the temperature. Computer monitors typically have a color temperature of 5000-
9300 Kelvin: 5000 Kelvin is a yellow-white, 9300 Kelvin is a blue-white and 6500
Kelvin is a standard white point that matches daylight at noon.
Contrast
Difference in color and/or brightness of an image and other images within the same
field of view.
Curves
Graph of tonal response characteristics in the display.
Gamma
Non-linear operation used to code and decode brightness values in an image.
Gamut
Refers to the complete set of colors which can be reproduced/captured by a device.
Kelvin
Kelvin scale is a measure of temperature, starting from absolute zero.
Luminance
Amount of light emitted or reflected from a surface.
NTSC
Default color space for television.
OSD
Abbreviation for “On-Screen Display”.
Profile
Data file used to define and match color.
Room Light
(See Ambient Light.)
Saturation
Intensity of a color, expressed as the degree to which it differs from white. Can also
be described as vividness or richness of a color.
sRGB
Default color space for the Internet.
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