Table of Contents
Advances in Electrical Engineering
Volume 2015, Article ID 879340, 10 pages
Research Article

A Photoplethysmography Melanin Evaluation System by Modified Boltzmann Transport Equation (BTE)

Department of Electrical Engineering, National Chiao Tung University, Room 720, Engineering Building 5, 1001 University Road, Hsinchu 30010, Taiwan

Received 11 March 2015; Revised 12 May 2015; Accepted 31 May 2015

Academic Editor: José R. C. Piqueira

Copyright © 2015 Sheng-Chieh Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


With the advance in cosmetic medical technology in recent years, more and more people get cosmetic medical treatments, especially skin whitening treatments. Nevertheless, people usually assess the effect of skin whitening products by vision, which is subjective and will be different from each person. To acquire the value of melanin concentration objectively, people need to go to cosmetic medical clinics. This will cause inconvenience to people. This paper develops a novel evaluation platform based on optical assessment methods, which employ different absorption and scattering properties to different wavelengths of light in human tissue to obtain melanin concentration. Moreover, this paper proposes a new method that compensates the interaction between epidermis and dermis to acquire the melanin concentration more accurately. The novel platform designed in this paper is smaller and consumes lower-power and smaller when comparing to other conventional devices in market.