FINGERPRINT SENSOR, BIOMETRICS AUTHENTICATION APPARATUS, METHOD FOR RETRIEVING FINGERPRINT DETECTION CONDITION, AND METHOD FOR DETECTING FINGERPRINT

摘要

PPROBLEM TO BE SOLVED: To provide a fingerprint sensor capable of quickly and efficiently retrieving an optimum fingerprint detection condition. PSOLUTION: The fingerprint sensor (1) for converting the rugged information of a fingerprint into binary data of "0" and "1" on the basis of a prescribed threshold is provided with a threshold setting means for setting the threshold so that the rate of "0" to "1" in binary data becomes similar in the detected area of the fingerprint. Since the threshold is set so that the rate of "0" to "1" in binary data becomes similar in the detected area of the fingerprint, the fingerprint can be clearly discriminated. PCOPYRIGHT: (C)2005,JPO&NCIPI