Fig. 3.

(Top) Reduced scattering and (bottom) absorption coefficients measured on (left) the palm and (right) ventral forearm measured with SFDI, using a homogeneous skin model. Each data point represents the mean (± standard deviation) of reduced scattering or absorption coefficients measured within the chosen ROIs. The color scales are arranged by ventral forearm $L*$ value, where blue is low $L*$ (dark skin) and red is high $L*$ (light skin).