Automated recognition and extraction of tabular fields for the indexing of census records

Robert Clawson; Kevin Bauer; Glen Chidester; Milan Pohontsch; Douglas Kennard; Jongha Ryu; William Barrett

doi:10.1117/12.2004788

4 February 2013 Automated recognition and extraction of tabular fields for the indexing of census records

Robert Clawson, Kevin Bauer, Glen Chidester, Milan Pohontsch, Douglas Kennard, Jongha Ryu, William Barrett

Proceedings Volume 8658, Document Recognition and Retrieval XX; 86580J (2013) https://doi.org/10.1117/12.2004788
Event: IS&T/SPIE Electronic Imaging, 2013, Burlingame, California, United States

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.

Citation Download Citation

Robert Clawson, Kevin Bauer, Glen Chidester, Milan Pohontsch, Douglas Kennard, Jongha Ryu, and 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); https://doi.org/10.1117/12.2004788

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