We present a method for detection of absorption change in skin tissue on the basis of simulated spectra extracted from an absorption-oriented database. We constructed the database with a moderate number of reflectance spectra which are simulated by the Monte Carlo method using the nine-layered skin model. In the construction of database, change of only absorption coefficients in the nine layers is made with two magnification factors for two groups of layers. For a measured spectrum with an absorption change, a simulated spectrum is being extracted out from the database by the criterion of root mean square error. The absorption coefficients associated with the extracted spectrum are used to specify the absorption change in the measured spectrum. We performed experiments of suntan, pressure-cuff occlusion and hot water immersion and compared the results with those of the multiple regression analysis to show the usefulness of the method for evaluating the change of absorption properties from measured spectra.

我们提出了一种基于从面向吸收的数据库中提取的模拟光谱来检测皮肤组织吸收变化的方法。我们用中等数量的反射光谱构建了数据库，这些反射光谱是使用九层皮肤模型通过蒙特卡罗方法模拟的。在数据库的构建中，只改变九层的吸收系数，对两组层用两个放大系数。对于具有吸收变化的测量光谱，通过均方根误差准则从数据库中提取模拟光谱。与提取光谱相关的吸收系数用于指定测量光谱中的吸收变化。我们进行了晒黑的实验，