[OPTICAL REVIEW Vol. 15, No. 6 (2008) 292-294]
© 2008 The Optical Society of Japan

Regression-Based Model of Skin Diffuse Reflectance for Skin Color Analysis

Norimichi TSUMURA1, Daisuke KAWAZOE1, Toshiya NAKAGUCHI1, Nobutoshi OJIMA1,2, and Yoichi MIYAKE1

1Department of Information and Image Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
2Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 131-8501, Japan

(Received June 20, 2008; Accepted August 20, 2008)

A simple regression-based model of skin diffuse reflectance is developed based on reflectance samples calculated by Monte Carlo simulation of light transport in a two-layered skin model. This reflectance model includes the values of spectral reflectance in the visible spectra for Japanese women. The modified Lambert Beer law holds in the proposed model with a modified mean free path length in non-linear density space. The averaged RMS and maximum errors of the proposed model were 1.1 and 3.1%, respectively, in the above range.

Key words: skin reflectance, regression, modified Lambert Beer law