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Luminance The physical measure of brightness. Luminous intensity per unit projected area of any surface, as measured from a specific direction. Luminance (usually 'L' in formulas) is the amount of visible light leaving a point on a surface in a given direction. This "surface" can be a physical surface or an imaginary plane, and the light leaving the surface can be due to reflection, transmission, and/or emission. The standard unit of luminance is candela per square meter (cd/m2). (also called Nits in the USA, from latin "nitere" = "to shine"). There are several older units of luminance:  Typical luminance values are:  Photometric brightness is an old and deprecated term for luminance(Term of photometry). [ Go Back ] Copyright © by PhotosByTom - (846 reads) |
