Simple and affordable imaging of multiple physiological parameters with RGB camera-based diffuse reflectance spectroscopy.

We propose a simple and affordable imaging technique to evaluate transcutaneously multiple physiological parameters by using a digital red-green-blue camera. In this method, the -values were converted into tristimulus values in the CIE (Commission Internationale de l'Eclairage) XYZ color space, which is compatible with the common color spaces. Monte Carlo simulation for light transport in biological tissue was then performed to specify the relationship among the -values and the concentrations of oxygenated hemoglobin, deoxygenated hemoglobin, bilirubin, and melanin.