A system 1 comprises: a spectroscopic optical part 2a for spectrally separating emitted light from a subject 10; a photoelectrical conversion part 2b for generating electric signals by photoelectrically converting the respective separated lights; an image processing part 4 for generating a pseudo color image and computing numerical values of a color specification system for performing color display of the image; and image outputting parts 5 and 6 for outputting the above-mentioned image and/or numerical values. The image processing part generates image signals by applying sensitivity functions to the respective electric signals, uses the image signals to compute the above-mentioned numerical values, and applies a matrix M to the image signals to generate a pseudo color image. The sensitivity functions are determined based on a correlation between physical state or chemical state differences among subjects and differences in waveform that occur among optical spectra of a plurality of subjects and M is determined so as to minimize color reproduction errors. <IMAGE>
SYSTEM FOR MEASURING CHROMATICITY IN VISIBLE AND INVISIBLE REGIONS