Luminance Luminance Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted or reflected from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m). A non-SI term for the same unit is the nit. The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m. Luminance is often used to characterize emission or reflection from flat, diffuse surfaces. The luminance
Curvature of a measure by One may also refer to the curvature of "μ" at a given point "x": in which case In this section, R is thought of as the complex plane C. Melnikov and Verdera (1995) showed the precise relation of the boundedness of the Cauchy kernel to the curvature of measures. They proved that if there is some constant "C" such that for all "x" in C and all "r" > 0, then there is another constant "C", depending only on "C", such that for all "ε" > 0. Here "c" denotes a truncated version of the Menger-Melnikov curvature in which