Patent ID: 6304294
Filing Date: 2001-10-16
Classification: H04N

Abstract:
An apparatus for estimating an illumination of a scene, the apparatus comprising:a. a sensor device for detecting a light wave from the scene; andb. a processor coupled to the sensor device wherein the processor is configured to receive the illumination data from the sensor and to estimate a value for a set of weighting coefficients .alpha..sub.m and a set of weighting coefficients .beta..sub.k,m, as defined by the relation: ##EQU14##wherein n represents a number of wavelengths, S.sub.j (n) represents a sensor sensitivity function, B.sub.m (n) represents a basis function for modeling spectral power distribution, C.sub.m (n) represents a basis function for modeling spectral reflectance, and f.sub.kj represents a function of a color value of each pixel.