Accurate Mapping Pigmentations in Human Skin by Spatio-Temporal Modulation of Light Source in the Multi-Spectral Imaging

Recently, it is expected to monitor a health condition of elder people at their home. Skin color has a lot of information to monitor the health condition. A monitoring system of the pigmentation in human skin will be effective to detect a sudden change of the health condition. A prototype monitoring system was proposed in our previous paper. In that system, an integrated sphere was used to illuminate the skin surface uniformly. However, it was not practical for daily life to use the integrated sphere. In this paper, we constructed a daily monitoring system for skin pigmentation by using spatio-temporal modulation of light source to cancel the shading on the skin surface. We performed experiments to show the effectiveness of our system.