Abstract: Methods and systems are provided for performing a biometric function. A purported skin site of an individual is illuminated with white light. Light scattered from the purported skin site is received with a color imager on which the received light is incident. Spatially distributed images of the purported skin site are derived and correspond to different volumes of illuminated tissue of the individual. The images are analyzed to perform the biometric function.

Abstract: Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual disposed relative to a platen is illuminated under distinct optical conditions during a single illumination session. At least one of the optical conditions includes illuminating the purported skin site with light at an angle greater than a critical angle defined by an interface of the platen with an external environment. At least another of the distinct optical conditions includes illuminating the purported skin site with light at an angle less than the critical angle. Light scattered from the purported skin site is received separately for each of multiple optical conditions to derive a multispectral image of the purported skin site.