4 February 2013 Automated recognition and extraction of tabular fields for the indexing of census records
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Abstract
We describe a system for indexing of census records in tabular documents with the goal of recognizing the content of each cell, including both headers and handwritten entries. Each document is automatically rectified, registered and scaled to a known template following which lines and fields are detected and delimited as cells in a tabular form. Whole-word or whole-phrase recognition of noisy machine-printed text is performed using a glyph library, providing greatly increased efficiency and accuracy (approaching 100%), while avoiding the problems inherent with traditional OCR approaches. Constrained handwriting recognition results for a single author reach as high as 98% and 94.5% for the Gender field and Birthplace respectively. Multi-author accuracy (currently 82%) can be improved through an increased training set. Active integration of user feedback in the system will accelerate the indexing of records while providing a tightly coupled learning mechanism for system improvement.
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Robert Clawson, Robert Clawson, Kevin Bauer, Kevin Bauer, Glen Chidester, Glen Chidester, Milan Pohontsch, Milan Pohontsch, Douglas Kennard, Douglas Kennard, Jongha Ryu, Jongha Ryu, William Barrett, William Barrett, } "Automated recognition and extraction of tabular fields for the indexing of census records", Proc. SPIE 8658, Document Recognition and Retrieval XX, 86580J (4 February 2013); doi: 10.1117/12.2004788; https://doi.org/10.1117/12.2004788
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