Paper Info
Title
Optimal watermark detection under quantization in the transform domain
Abstract
The widespread use of digital multimedia data has increased the need for effective means of copyright protection. Watermarking has attracted much attention, as it allows the embedding of a signature in a digital document in an imperceptible manner. In practice, watermarking is subject to various attacks, intentional or unintentional, which degrade the embedded information, rendering it more difficult to detect. A very common, but not malicious, attack is quantization, which is unavoidable for the compression and transmission of digital data. The effect of quantization attacks on the nearly optimal Cauchy watermark detector is examined in this paper. The quantization effects on this detection scheme are examined theoretically, by treating the watermark as a dither signal. The theory of dithered quantizers is used in order to correctly analyze the effect of quantization attacks on the Cauchy watermark detector. The theoretical results are verified by experiments that demonstrate the quantization effects on the detection and error probabilities of the Cauchy detection scheme.
Year
DOI
Venue
2004
10.1109/TCSVT.2004.836753
IEEE Trans. Circuits Syst. Video Techn.
Keywords
Field
DocType
optimal watermark detection,digital data,quantization attack,digital multimedia data,quantization effect,digital document,copyright protection,detection scheme,cauchy watermark detector,cauchy detection scheme,optimal cauchy watermark detector,watermarking,statistical analysis,data compression,error detection,error probability
Computer vision,Digital watermarking,Pattern recognition,Computer science,Cauchy distribution,Error detection and correction,Watermark,Artificial intelligence,Dither,Quantization (signal processing),Data compression,Digital data
Journal
Volume
Issue
ISSN
14
12
1051-8215
Citations 
PageRank 
References 
16
0.76
19
Authors
2
Name
Order
Citations
PageRank
A. Briassouli11448.00
michael g strintzis2109579.71