Abstract:
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In this work we measure and evaluate the color of irises, prostheses and cosmetic colored contact
lenses with a system based on a digital RGB color camera. Using multispectral tools, the CIE L*a*b*
colorimetric coordinates are computed from the RGB digital values of the acquired images. With the
statistical analysis of the L*a*b* values, the color gamuts and the CIEDE2000 color differences, a
comparison of the color associated to each set of samples is performed. Specifically, the samples are
classified in three major groups: brown, blue and green, using a new algorithm developed for this
purpose. In the same way, the irises color reproduction achieved by prostheses and contact lenses is
analysed, obtaining closer results in prostheses than in contact lenses. Besides, a preliminary analysis
of the color spatial distribution of the irises, prostheses and cosmetic colored contact lenses by means
of an algorithm based on co-occurrence matrices is also performed. The results obtained suggest that
the color spatial distribution and therefore, the texture associated to each kind of samples, is very
different. This study provides useful information on the color and texture of irises and may help
improving the techniques used in the manufacturing process of prostheses and colored contact lenses
in order to obtain a better and more realistic appearance. |