3次元回転不変カメラベース文字認識

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2013/04/01

タイトル(英語): Three Dimensional Rotation-Free Camera-based Character Recognition

著者名: 成田　了（三重大学大学院工学研究科），大山　航（三重大学大学院工学研究科），若林　哲史（三重大学大学院工学研究科），木村　文隆（三重大学大学院工学研究科）

著者名(英語): Ryo Narita (Graduate School of Engineering, Mie University), Wataru Ohyama (Graduate School of Engineering, Mie University), Tetsushi Wakabayashi (Graduate School of Engineering, Mie University), Fumitaka Kimura (Graduate School of Engineering, Mie University)

キーワード: カメラベース文字認識，回転不変，加重方向指数ヒストグラム，MQDF　　Camera-based Character Recognition，Rotation-Free，Weighted Direction Code Histogram，Modified Quadratic Discriminant Function

要約(英語): In this paper, we propose a new method for three dimensional rotation-free recognition of characters in scene. In the proposed method, we employ the Modified Quadratic Discriminant Function (MQDF) classifier trained with samples generated by three dimensional rotation process in a computer. We assume that when recognizing individual characters, considering three dimensional rotation can approximately handle the recognition of characters with perspective distortion. The results of the evaluation experiments using printed alphanumeric characters as an evaluation data set, consisting of approximately 600 samples per class for 62 character classes, show that the recognition rate is 99.34% for rotated characters while it is 99.59% for non rotated characters. We have empirically confirmed that the rotated characters given as the training data set do not negatively affect significantly to recognition of non rotated characters. Moreover, 813 characters extracted from 58 camera-captured scenes were correctly recognized and the feasibility of real world application of our method has been confirmed.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.133 No.4 （2013） 特集：新たなサービス社会に貢献する情報・システム技術

本誌掲載ページ: 876-882 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/133/4/133_876/_article/-char/ja/