Abstract
As a basis for creating healthy indoor environments, one possible approach is to evaluate physiological responses to changes in ambient temperature and humidity. This study focuses on the fineness of skin texture as a criterion for evaluating skin health. The characteristics of annual fluctuation in skin texture were measured by microscope and image analysis using Fourier transform, and the correlation with temperature and humidity was analyzed. The skin texture measurements were conducted 3-7 times on weekdays between 8 am and 9 pm for about 6 months from spring to fall. The results showed that the higher ambient temperature, relative humidity, and absolute humidity were, the finer the skin texture was. In addition, a newly defined relative humidity as a function of skin temperature shows higher correlation with skin texture than the temperature and humidity.
