Palm image pattern recognition and identification system - has raster optically scanning surface of palm to sense varying levels of light using flashing UV source

摘要

The system is for enhancing image details of an object to be recorded. The object, such as the palm of a hand, is bombarded by radiant energy from an ultraviolet light source in such a manner that the object absorbs the radiant energy and emits visible light in the form of fluorescence and phosphorescence. A camera optically scans the object and records image details that have become available due to the fluorescence and phosphorescence. The details of objects having rough or irregular surfaces may be further enhanced by disposing the ultraviolet light source at an angle with respect to the surface of the object so that some portions are shaded while other portions of the surface absorb the radiant energy and emit visible light. Appropriate filters may be provided to reduce the effects of extraneous light.