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Ninth International Conference on Document Analysis and Recognition (ICDAR 2007) Vol 1
Robust Document Warping with Interpolated Vector Fields
Curitiba, Parana, Brazil
September 23-September 26
ISBN: 0-7695-2822-8
D. Schneider, Freie Universitat Berlin
M. Block, Freie Universitat Berlin
R. Rojas, Freie Universitat Berlin
This paper describes a new versatile algorithm for cor- recting nonlinear distortions, such as curvature of book pages, in camera based document processing. We introduce the idea of using local orientation features to interpolate a vector field from which a warping mesh is derived. Ulti- mately, the image is corrected by approximating the non- linear distortion with multiple linear projections. Since the algorithm does not derive the mesh directly from text base- lines it is robust over arbitrarily complex text layouts. We describe a baseline detector for extracting the required lo- cal orientation features. We also sketch a method for cor- recting nonlinear distortions of a document's vertical axis with our algorithm.
Citation:
D. Schneider, M. Block, R. Rojas, "Robust Document Warping with Interpolated Vector Fields," icdar, vol. 1, pp.113-117, Ninth International Conference on Document Analysis and Recognition (ICDAR 2007) Vol 1, 2007
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