[OPTICAL REVIEW Vol. 19, No. 3 (2012) 167-173]
© 2012 The Japan Society of Applied Physics
Effects of Diffuse and Specular Reflections on the Perceived Age of Facial Skin
Carlos ARCE-LOPERA, Takanori IGARASHI1, Keisuke NAKAO1, and Katsunori OKAJIMA2
Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan 1Beauty Cosmetic Research Laboratory, Kao Corporation, Sumida, Tokyo 131-8501, Japan 2Faculty of Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan
(Received January 7, 2012; Revised February 20, 2012; Accepted February 24, 2012)
Age perception is a better biomarker of skin aging than chronological age. However, the optical cues that determine the perception of human skin age are difficult to assess given the complex interactions between light and the multi layered structure of the skin. The aim of the present study is to clarify the independent contribution of both diffuse and specular reflection components to the skin age perception. First, according to our results, subjects were able to estimate the age of skin only by using the diffuse reflection component. Moreover, we showed that inclusion of the specular reflection component added on average 5 years to their age estimation. Second, by artificially manipulating the specular component, we concluded that the luminance distribution affects the perceived age of the skin.
Key words: diffuse reflectance, specular reflectance, age perception, facial skin, image analysis