• K. Uto Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, 4259 Nagatsuta, Midori-ku, Yokohama
  • H. Seki Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, 4259 Nagatsuta, Midori-ku, Yokohama
  • T. Murase Sumitomo Electric Industries, LTD, 1-1-3, Konohana-ku, Osaka,
  • S. Takagishi Sumitomo Electric Industries, LTD, 1-1-3, Konohana-ku, Osaka,
  • Y. Kosugi Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, 4259 Nagatsuta, Midori-ku, Yokohama,



A portable human skin detector based on a human skin index, NDHI, is introduced in this paper. The aim of system is at the safe, real-time and robust detection of human skin under various illumination conditions by the combination of the active pulse il-lumination of two low power LEDs, i.e. 1070 and 1550nm, with high frequency and the phase sensitive detection. The detection performance of the proposed system is evaluated under clear sky and in dark place


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