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Document Image Dewarping Based on Line Estimation for Visually Impaired
Arlington, Virginia November 13-November 15
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICTAI.2006.5218th IEEE International Conference on ...
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P. Kakumanu, Wright State University, USA
N. Bourbakis, Wright State University, USA
J. Black, Arizona State University, USA
S. Panchanathan, Arizona State University, USA
In this paper, we present an image-text dewarping methodology based on robust estimation of text-lines. When a text-page is captured by a camera, it suffers both from the perspective distortions and the page curl. The non-linear distortion due to page-curl is inherently present, given the surface nature of the pages and the text-book. The state-of-the-art OCR systems have a very low performance on recognizing such distorted text. To remove both these distortions and to produce a flattened view of the text, we use the cues present in the image-text, i.e., the text-lines on the surface of the page are straight. The methodology requires only a single camera captured image and does not require any calibration or any other expensive hardware setups as in other methods. Experimental results on a set of documents show that the methodology produces visually pleasing output and also improves OCR accuracy.
Index Terms:
Document Image Analysis, Perspective Rectification, Page-curl Dewarping and Assistive Devices
Citation:
P. Kakumanu, N. Bourbakis, J. Black, S. Panchanathan, "Document Image Dewarping Based on Line Estimation for Visually Impaired," ictai, pp.625-631, 18th IEEE International Conference on Tools with Artificial Intelligence (ICTAI'06), 2006
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