背景色情報を活用した看板内の文字列領域抽出法

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: 2014/01/01

タイトル(英語): Extraction of Character Sequence from Signboards by Using Background Color Information

著者名: 野村　松信（秋田公立美術大学美術学部美術学科／秋田大学大学院工学資源学研究科），鈴木　拓真（秋田大学大学院工学資源学研究科），景山　陽一（秋田大学大学院工学資源学研究科），石沢　千佳子（秋田大学大学院工学資源学研究科），西田　眞（秋田大学大学院工学資源学研究科）

著者名(英語): Matsunobu Nomura (Department of Art, Akita University of Art/Graduate School of Engineering and Resource Science, Akita University), Takuma Suzuki (Graduate School of Engineering and Resource Science, Akita University), Yoichi Kageyama (Graduate School of Engineering and Resource Science, Akita University), Chikako Ishizawa (Graduate School of Engineering and Resource Science, Akita University), Makoto Nishida (Graduate School of Engineering and Resource Science, Akita University)

キーワード: 看板，情景画像，色情報，形状特徴　　signboard，scene images，color information，shape features

要約(英語): The smart phones, tablet terminals and mobile phones with built-in cameras are today very popular because of their ease of use. It is important for image processors to be able identify a signboard in an image and extract the character sequence. Techniques for extracting a character sequence from a signboard can combined with various other systems to realize a diverse range of services. When utilization of the system is assumed, it is necessary to consider improvement in the extraction accuracy of a character string domain, and improvement in the speed of the processing. Therefore, this paper proposes an algorithm for extracting character sequence from signboards on the basis of scene image features. In order to improve processing speed and accuracy, the information about the background color of the signboard obtained by cooperation with the car-navigation system etc. was also utilized. In the experiment conducted for 319 color signboards, the proposed method detected 313 signboards (98.12%), and for 569 monochrome signboards, the proposed method detected 513 signboards (90.16%). Moreover, the average processing time of the proposed method was about 0.47 seconds for a color signboard, and was about 0.95 seconds for a monochrome signboard. The experimental results revealed that the proposed method was able to accurately extract the different type of character string on signboard.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.134 No.1 （2014） 特集：スマート社会を支える電子回路技術

本誌掲載ページ: 121-130 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/134/1/134_121/_article/-char/ja/