luminance Hear it!

luminance definition - telecom
The measure of intensity, or brightness, as measured in candelas per square meter. Luminance can vary within an image. An analog video transmission varies the luminance by varying the power level, or amplitude, of the signal, with high power representing black and low power representing white. See also candela and luminous flux.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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