Appearance Analysis of Human Skin with Cosmetic Foundation

摘要

We describe a method of analyzing the appearance of cosmetic foundation applied to the human face. In particular, we focus on the "oily-shine" appearance, which is caused by sebum. A multi-band camera system with six spectral channels is used for the analysis of the oily-shine appearance. As a basic analysis, we examine the optical features of oily-shine by using two artificial skins looking like make-up skin with oily-shine and without oily-shine. We show that oily-shine can be defined as the standard dichromatic reflection model. On the basis of the above findings, we propose a method for detecting oily-shine area. This method involves (1) the extraction candidate areas, and (2) the evaluation of appearance with oily-shine. First, we capture the CIE XYZ tri-stimulus image of an original make-up face by using the multi-band camera and after a few hours later, capture the same face as a test facial image. Second, the candidate areas with oily-shine are extracted by applying the Laplacian operator to luminance Y component of the test facial image. Third, the principal component analysis is performed on the set of luminance and chromaticity (Y, x,y) of each candidate area. Light reflection of oil-shine is regarded as the specular component of the dichromatic reflection. Finally, we determine the existence of oily-shine by comparing specular clusters between the original image and the test image. The proposed method is tested in experiments with subjective assessment for various real make-up facial images.