Fig. 8.

Predicted blood volume ($B$), oxygen saturation ($S$), melanin ($f_m$), and corresponding RGB images for the pigmentation/occlusion experiment. The top finger was occluded by a rubber band that is indicated by the white asterisk in each image, and the middle finger was not occluded. Each subject’s skin was assigned a score based on the Fitzpatrick skin type scale, where I is least pigmented and VI is most pigmented. Subject 1 showed Fitzpatrick type II, subject 2 showed type III, and subject 3 showed type IV.