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カメラ入力画像の多段修復による印刷漢字認識


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Title: カメラ入力画像の多段修復による印刷漢字認識
Other Titles: Printed Kanji Character Recognition by Multistage Restoration of Character Images Taken by Digital Camera
Authors: 胡, 彦 / 松田, 和生 / 堀田, 政二 / 志久, 修 / 宮原, 末治
Authors (alternative): Hu, Yan / Matsuda, Kazuo / Hotta, Seiji / Shiku, Osamu / Miyahara, Sueharu
Issue Date: Jan-2004
Citation: 長崎大学工学部研究報告 Vol.34(62) p. 61-67, 2004
Abstract: In this paper, we propose a multistage restoration method in order to obtain a high-quality binary character pattern from a character image taken by digital camera. First, the character image is expanded and blurred before being converted into the binary character pattern. Multiple thresholds based on Otsu's Method are applied when binarization is performed. Next, the binary character pattern is modified by a system using ridge and ravine points. Then, line width of the character is normalized using thinning. In experiments, multifont characters were used for evaluating the restoration method and recognition accuracy was improved by approximately 5% from 86% to 91%.
URI: http://hdl.handle.net/10069/15068
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 34, No. 62

Citable URI : http://hdl.handle.net/10069/15068

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