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Proceedings Paper

A multiresolutional algorithm for halftone detection
Author(s): Onur G. Guleryuz
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Paper Abstract

In this paper we present an algorithm that segments a scanned, compound document into halftone and non-halftone areas. Our work is intended as a precursor to sophisticated document processing applications (descreening, compression, document content analysis, etc.) for which undetected halftones may cause serious adverse affects. Our method is of very low computational and memory complexity and performs only a single pass on the scanned document. Halftone regions of arbitrary size and shape are detected on compound multilingual documents in a completely automated fashion without any prior knowledge on the type and resolution of the halftones to be detected. The proposed technique can be adjusted to determine halftones of particular dpi resolution or decompose detected halftones to constituent resolutions. We obtain high detection probabilities on compound multilingual documents containing halftones and fine text.

Paper Details

Date Published: 14 March 2005
PDF: 8 pages
Proc. SPIE 5685, Image and Video Communications and Processing 2005, (14 March 2005); doi: 10.1117/12.596999
Show Author Affiliations
Onur G. Guleryuz, Epson Palo Alto Lab. (United States)

Published in SPIE Proceedings Vol. 5685:
Image and Video Communications and Processing 2005
Amir Said; John G. Apostolopoulos, Editor(s)

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