Method and arrangement for finger-print verification.

摘要

The fingerprint identification system involves using a compound prism with reflecting surface elements (14). The image of the finger (1) is directed onto a lens (7) and is focussed onto an optical sensor, e.g. a CCD array (8) that generates input to a processor (18) for identification. The readings of the fingerprint are taken when a pressure sensor (10) indicates a certain contact level has been attained. The processing cycle includes a comparison of the image intensity with a reference level.