The stool color card for early detection of biliary atresia have been developed using multispectral images of stools of newborns. Color and its spectra were measured and analyzed spectrally first in the world and used to design the stool color card. Representative texture was selected by medical specialists from captured multispectral images and spectral information of the images was replaced and edited according to the result of spectral and chromaticity analysis. The stool color card was placed within the Maternal and Child Health Handbook that was distributed to all pregnant women by their respective local government according to the Maternal and Child Health Law in Japan.
M. Tsuchida, H. Gunji, H. Nakajima, T. Kawanishi, K. Kashino, A. Matsui, "Development of the Stool Color Card for Early Detection of Biliary Atresia using Multispectral Image" in Proc. IS&T 27th Color and Imaging Conf., 2019, pp 304 - 307, https://doi.org/10.2352/issn.2169-2629.2019.27.55