Watermarking document images with bounding box expansion
Identifieur interne : 002718 ( Main/Exploration ); précédent : 002717; suivant : 002719Watermarking document images with bounding box expansion
Auteurs : Jack Brassil [États-Unis] ; Larry O'Gorman [États-Unis]Source :
- Lecture Notes in Computer Science [ 0302-9743 ] ; 1996.
Abstract
Abstract: Imperceptible displacements of text objects has been shown to be a successful technique for hiding data in document images. In this paper we extend our earlier work to show how the height of a bounding box enclosing a group of text words can be used to increase the density of information hidden on a page. We present experimental results which show that bounding box expansions as small as 1/300 inch can be reliably detected, even after the distortions introduced by noisy image reproduction devices such as plain paper copiers. Digital watermarks based on this technique can be used with electronically disseminated documents for applications including copyright protection, authentication, and tagging.
Url:
DOI: 10.1007/3-540-61996-8_43
Affiliations:
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Le document en format XML
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