Luminance while imaging luminance meters measure luminance in a way similar to the way a digital camera records color images. 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
Random measure are measurable, so they are random variables. The distribution of a random measure is uniquely determinded by the distributions of for all continuous functions with compact support formula_41 on formula_57. For a fixed semiring formula_58 that generates formula_2 in the sense that formula_60, the distribution of a random measure is also uniquely determined by the integral over all positive simple formula_61-measurable functions formula_41. A measure generally might be decomposed as: Here formula_64 is a diffuse measure without atoms, while formula_65 is a purely atomic measure. A random measure of the form: where formula_67 is the Dirac measure, and formula_68 are