Patent ID: 6539323
Filing Date: 2003-03-25
Classification: G01J,G01N

Abstract:
A method for correcting spectral measurements of a color sensing device, comprising:obtaining a set of spectral measurements, each of said measurements representing an amplitude of detected light in a spectral band from a plurality of respective N spectral bands, such that the set of spectral measurements is represented by a 1Ã—N spectral measurement vector; calculating a set of basis function weighting vectors based on the difference between measured spectra values for a plurality of color samples and a set of reference spectra values for said color samples; and forming an NÃ—N transform matrix based on said basis function weighting vectors and said measured spectra values, said NÃ—N transform matrix providing mapping between the spectral measurements and a corrected spectra; and multiplying the 1Ã—N spectral measurement vector by the NÃ—N transform matrix to generate a corrected spectrum.