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

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