[OPTICAL REVIEW Vol. 21, No. 3 (2014) 369-372]
© 2014 The Japan Society of Applied Physics

Color Adjustment Algorithm Adapted to the Spectral Reflectance Estimation Method

Tomonori YUASA1, Ryosuke HONMA1, Hideki FUNAMIZU1, Izumi NISHIDATE2, and Yoshihisa AIZU1

1Instrumentation Systems Engineering Laboratory, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan
2Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan

(Received October 15, 2013; Accepted January 13, 2014)

We are developing a daily health monitoring system that uses mobile phones with cameras and analyzes physiological conditions from R, G, and B intensity levels. However, since it is affected by various imaging conditions of the image input, color correction is required for accurate health monitoring. Therefore, we developed and validated a color-correction algorithm to derive reliable color information by correcting the spectral reflectance using the Wiener estimation and a color chart.

Key words: color correction, color chart, Wiener estimation, spectral reflectance