フルテキストファイル
著者
Nakanishi Isao Graduate School of Engineering, Tottori University 研究者総覧 KAKEN
Nakatani Shingo Graduate School of Engineering Tottori University
Koike Shota Graduate School of Engineering Tottori University
キーワード
biometrics
on-line signature verification
DWT
DP matching
threshold equalizing
抄録
In this paper, we introduce simply partitioned DP (dynamic programming) matching and threshold equalizing into the verification process in DWT (discrete wavelet transform) domain on-line signature verification in order to improve the performance. The simply partitioned DP matching divides both data series (verification and template data) into several partitions and calculate sub DP distance every partition. Even if mismatched pairs are caused in each partition, they are initialized at the beginning of the next partition and matching errors could be reduced. The threshold equalizing suppresses the variation range of optimal thresholds for all users (signatures), so that it prevents the verification performance from degrading by common use of single threshold for all users. In particular, we propose two equalizing methods in which the relation between the number of sampled data and optimal thresholds in signatures are approximated and adjusted by linear and nonlinear functions. In verification experiments using the signature database: SVC2004, it is confirmed that the proposed methods are effective for improving the performance.
出版者
IEEE
資料タイプ
会議資料
外部リンク
ISBN
9781424483532
掲載誌名
Proceedings of 12th International Conference on Frontiers in Handwriting Recognition (ICFHR2010)
最新掲載誌名
Proceedings of 12th International Conference on Frontiers in Handwriting Recognition (ICFHR2010)
開始ページ
101
終了ページ
106
発行日
2010
出版者DOI
著者版フラグ
著者版
著作権表記
© © 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
掲載情報
Proceedings of 12th International Conference on Frontiers in Handwriting Recognition (ICFHR2010). 2010, 101-106
部局名
工学部・工学研究科
言語
英語