Document Image Binarization Using Retinex and Global Thresholding

Document images are usually degraded in the course of photocopying, faxing, printing, or scanning. Degradation problems seems negligible to human eyes but can be responsible for an abrupt decline in accuracy by the current generation of optical character recognition (OCR) systems. In this paper we p...

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Bibliographic Details
Published in:Electronic letters on computer vision and image analysis 2015, Vol.14 (1), p.61-73
Main Authors: Wagdy, Marian, Faye, Ibrahima, Rohaya, Dayang
Format: Article
Language:English
Subjects:
binarization
degradation
digitization
lightness
retinex theory
Thresholding
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Summary:Document images are usually degraded in the course of photocopying, faxing, printing, or scanning. Degradation problems seems negligible to human eyes but can be responsible for an abrupt decline in accuracy by the current generation of optical character recognition (OCR) systems. In this paper we present binarization method based on retinex theory followed by a global threshold. High quality results in terms of visual criteria and OCR performance is produced compared to the previous works.
ISSN:1577-5097
1577-5097
DOI:10.5565/rev/elcvia.648