DESIGN AND REALIZATION OF OPTIMAL COLOR FILTERS FOR MULTI-ILLUMINANT COLOR CORRECTION

A method of selecting optimal color filters to perform accurate multi- illuminant color correction is reviewed. The transmittances for a set of filters obtained by the method were provided to a color filter manu facturer. The manufacturer used a dichroic filter modeling program to produce transmittances that satisfied the physical constraints of the manufacturing process and approximated the optimal filter transmittanc es. The ideal and manufacturable filters are compared through computer simulation and their accuracy assessed during the CIE Delta E(La*b*) measure. The results show that the unconventional shapes of the optim al filters can be well approximated by actual filters with slight degr adation in performance.