Constructing basis functions using sensor wavelength dependence

Details Constructing basis functions using sensor wavelength dependence Constructing basis functions using sensor wavelength dependence

2006-12-11

2010-12-28

Strege, John B (Department: 2624)

Image analysis

Color image processing

Reexamination Certificate

active

07860304

ABSTRACT:
Generation of basis functions for spectral reflectances of color samples is provided. Reflectance information of the color samples is input, the reflectance information is weighted with a weighting function based on a wavelength dependence of an optical sensor, and the weighted information is analyzed to obtain the basis functions. Basis functions for illuminants are generated by inputting reflectance and associated information of the color samples, inputting illuminant information, constructing a matrix of weighted tristimulus values, and analyzing the matrix to obtain the basis functions. A weighting function for an optical sensor is generated by inputting a first weighting function, based on transformation of a reflectance perturbation from a reflectance space into a color space of the sensor, calculating the first weighting function with predetermined stimuli to obtain a plurality of resulting functions, and averaging the resulting functions to obtain the weighting function for the sensor.

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