Super-Resolved video mosaicing for documents based on extrinsic camera parameter estimation

Authors:
Akihiko Iketani;Tomokazu Sato;Sei Ikeda;Masayuki Kanbara;Noboru Nakajima;Naokazu Yokoya
Affiliations:
NEC Corporation, Nara, Japan;NEC Corporation, Nara, Japan;Nara Institute of Science and Technology, Nara, Japan;NEC Corporation, Nara, Japan;NEC Corporation, Nara, Japan;NEC Corporation, Nara, Japan
Venue:
ACCV'06 Proceedings of the 7th Asian conference on Computer Vision - Volume Part II
Year:
2006

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Abstract

This paper describes a novel video mosaicing method based on extrinsic camera parameter estimation. With our method, a mosaic image without perspective distortion can be generated, even if none of the input image plane is parallel to the target document. Thus, users no longer have to take special care in holding the camera so that the image plane in the reference frame is parallel to the target. First, extrinsic camera parameters are estimated by tracking image features. Next, by utilizing re-appearing features, estimated extrinsic camera parameters are globally optimized to minimize the estimation error in the whole input sequence. Finally, all the images are projected onto the mosaic image plane, and a super-resolved mosaic image is generated by applying an iterative back projection algorithm. Experiments have successfully demonstrated the feasibility of the proposed method.