Layout-free dewarping of planar document images

Masakazu Iwamura; Ryo Niwa; Akira Horimatsu; Koichi Kise; Seiichi Uchida; Shinichiro Omachi

doi:10.1117/12.806122

19 January 2009 Layout-free dewarping of planar document images

Masakazu Iwamura, Ryo Niwa, Akira Horimatsu, Koichi Kise, Seiichi Uchida, Shinichiro Omachi

Proceedings Volume 7247, Document Recognition and Retrieval XVI; 72470X (2009) https://doi.org/10.1117/12.806122
Event: IS&T/SPIE Electronic Imaging, 2009, San Jose, California, United States

Abstract

For user convenience, processing of document images captured by a digital camera has been attracted much attention. However, most existing processing methods require an upright image such like captured by a scanner. Therefore, we have to cancel perspective distortion of a camera-captured image before processing. Although there are rectification methods of the distortion, most of them work under certain assumptions on the layout; the borders of a document are available, textlines are in parallel, a stereo camera or a video image is required and so on. In this paper, we propose a layout-free rectification method which requires none of the above assumptions. We confirm the effectiveness of the proposed method by experiments.

Citation Download Citation

Masakazu Iwamura, Ryo Niwa, Akira Horimatsu, Koichi Kise, Seiichi Uchida, and Shinichiro Omachi "Layout-free dewarping of planar document images", Proc. SPIE 7247, Document Recognition and Retrieval XVI, 72470X (19 January 2009); https://doi.org/10.1117/12.806122

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