1. A method for performing a biometric measurement on an individual using a biometric measurement device, the method comprising: illuminating a purported skin site of the individual under a plurality of distinct optical conditions during a single illumination session when the entire purported skin site is not in contact with the biometric measurement device; receiving light scattered from the purported skin site separately for each of the plurality of distinct optical conditions when the entire purported skin site is not in contact with the biometric measurement device; deriving a multispectral image of the purported skin site from the received light; and performing a biometric function with the derived multispectral image.