Body zone`s e.g. finger, living character determining method for identifying person, involves determining living or non living character of body zone based on difference between ratio of luminance and ratio predicted by reflectance model

摘要

The method involves illuminating a body zone (6) using light beams emitted between two wavelengths at different spectral components. Luminance reflected by the zone is measured in each of the zones by a camera type luminance detection device (3). The reflected luminance is analyzed based on the wavelengths by comparing the luminance measured for each illuminated zone. The luminance ratio is formed, and a living or non living character of the body zone is determined based on the difference between the ratio of the luminance and a ratio predicted by a reflectance model. An independent claim is also included for a biometric capture optical device for implementing a method for determining a living character of a body zone, comprising a camera type luminance detecting device.