Methods and systems are provided for biometric sensing. An illumination
subsystem provides light at discrete wavelengths to a skin site of an
individual. A detection subsystem receives light scattered from the skin
site. A computational unit is interfaced with the detection system. The
computational unit has instructions for deriving a spatially distributed
multispectral image from the received light at the discrete wavelengths.
The computational unit also has instructions for comparing the derived
multispectral image with a database of multispectral images to identify
the individual.