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7 January 1999 Determining the resolution of scanned document images
Dan S. Bloomberg
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Proceedings Volume 3651, Document Recognition and Retrieval VI; (1999) https://doi.org/10.1117/12.335814
Event: Electronic Imaging '99, 1999, San Jose, CA, United States
Abstract
Given the existence of digital scanners, printers and fax machines, documents can undergo a history of sequential reproductions. One of the most important determiners of the quality of the resulting image is the set of underlying resolutions at which the images were scanned and binarized. In particular, a low resolution scan produces a noticeable degradation of image quality, and produces a set of printed fonts that cause omnifront OCR systems to operate with a relatively high error rate. This error rate can be reduced if the OCR system is trained on text having fax scanner degradations, but this also requires that the OCR system can determine in advance if such degraded fonts are present.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Dan S. Bloomberg "Determining the resolution of scanned document images", Proc. SPIE 3651, Document Recognition and Retrieval VI, (7 January 1999); https://doi.org/10.1117/12.335814
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KEYWORDS
Image resolution
Optical character recognition
Scanners
Image quality standards
Image quality
Binary data
Halftones
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