On-Line Signature Verification

• Main Authors: Lin, Jew-How, 林志浩
• Other Authors: Jenn-Hann Liu
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/97374309891492998261

碩士 === 國立交通大學 === 資訊工程學系 === 84 === Pen computing is getting more and more popular, Most PDA's (Personal Digital Assistant) and quite a few notebook PC's have a pen as their standard input device. Where a pen is available, so should a signature verification software. In this thesis our goal is to develop a signature verification software. We take signatures from a plain pen. A signature is just a sequence of points, which consists of 3 attributes : x coordinate, y coordinate and pen condition (pen up or pen down). Dynamic programming provides a good mechanism for the matching of two strings , especially when the two strings have exactly same sequence and vary only in length. We make use of simple feature to compare the differences of signature. 22 people were invited to test our system. They registered their signature and then later tested if the system would accept their signature . Some of them also made forgery test. A signature of another person was purposely displayed for them to immitate. Some did succeed with their forgery, while most attempts failed. Details of our system and results of our tests are reported in this thesis.