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19 January 2009 Camera-based document image mosaicing using LLAH
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In this paper we propose a mosaicing method of camera-captured document images. Since document images captured using digital cameras suffer from perspective distortion, their alignment is a diffcult task for previous methods. In the proposed method, correspondences of feature points are calculated using an image retrieval method LLAH. Document images are aligned using a perspective transformation parameter estimated from the correspondences. Since LLAH is invariant to perspective distortion, feature points can be matched without compensation of perspective distortion. Experimental results show that document images captured by a digital camera can be stitched using the proposed method.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomohiro Nakai, Koichi Kise, and Masakazu Iwamura "Camera-based document image mosaicing using LLAH", Proc. SPIE 7247, Document Recognition and Retrieval XVI, 72470O (19 January 2009);


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