Система цифровых водяных знаков с возможностью их извлечения из бумажных копий цифровых документов
https://doi.org/10.31854/1813-324X-2019-5-3-75-85
Abstract
In this paper it is presented Digital Watermark System for color images. The main feature of this system is an ability to extract digital watermarks even after printing and following scanning of watermarked images. There is a description of algorithms for embedding and extracting of additional information. These methods are based on the usage of spread-spectrum signals in the frequency domain. Furthermore, there is described algorithms of distortion correction after printing out and following scanning the paper copies of digital data. The results of the experimental research on evaluation of a possible embedding volume and the reliability after extraction of the embedded data are also presented.
About the Authors
V. .. Korzhik
The Bonch-Bruevich Saint-Petersburg State University of Telecommunications
Russian Federation
Russian Federation
D. .. Flaksman
The Bonch-Bruevich Saint-Petersburg State University of Telecommunications
Russian Federation
Russian Federation
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Review
For citations:
Korzhik V..., Flaksman D... . Proceedings of Telecommunication Universities. 2019;5(3):75-85. (In Russ.) https://doi.org/10.31854/1813-324X-2019-5-3-75-85
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