Stephen J. Preece Ela Claridge Spectral Filter Optimization for the Recovery of Parameters which Describe Human Skin. 913-922 2004 26 IEEE Trans. Pattern Anal. Mach. Intell. 7 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2004.36 db/journals/pami/pami26.html#PreeceC04