lightness(redirected from Lightnesss)
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Attribute of visual sensation in accordance with which a body seems to transmit or reflect diffusely a greater or smaller fraction of the incident light. This attribute is the psychosensorial correlate, or nearly so, of the photometric quantity luminance (CIE). See luminance.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann