Method of fingerprint image collation and its circuit

Abstract

Abstract PURPOSE:To perform pattern matching without causing any erroneous collation by changing the relative positional relation between plural partial images plastically when examining the coincidence of plural partial images stored beforehand and an inputted finger-print image. CONSTITUTION:A partial image scanning circuit 11 scans one partial image out of plural partial images stored beforehand on an inputted fingerprint image, and scans remaining partial images near a position moved parallel by a partial image shifting circuit 14. That is, scanning is made while changing the relative positional 14. That is, scanning is made while changing the relative positional relation between all partial images plastically. A discordance degree calculating circuit 12 calculates the degree of discordance of images at each position corresponding to the scanning, and the lowest degree of discordance out of the obtained degree of discordance and its position are stored in a memory circuit 13. A judging circuit 15 judges the coincidence and discordance of patterns according to whether the degree of discordance is less than a prescribed threshold value or not based on scanning of remaining partial images.

Inventors

• 👤 Hironori Yahagi
• 👤 裕紀 矢作
• 👤 Seigo Igaki
• 👤 井垣　誠吾
• 👤 Shin Eguchi
• 👤 江口　伸
• 👤 Hiroyuki Ikeda
• 👤 池田　弘之
• 👤 Yushi Inagaki
• 👤 雄史 稲垣

Bibliographic Details