DocumentCode :
3638171
Title :
Image watermarking using DCT domain constraints
Author :
A.G. Bors;I. Pitas
Author_Institution :
Dept. of Inf., Thessaloniki Univ., Greece
Volume :
3
fYear :
1996
Firstpage :
231
Abstract :
Watermarking algorithms are used for image copyright protection. The algorithms proposed select certain blocks in the image based on a Gaussian network classifier. The pixel values of the selected blocks are modified such that their discrete cosine transform (DCT) coefficients fulfil a constraint imposed by the watermark code. Two different constraints are considered. The first approach consists of embedding a linear constraint among selected DCT coefficients and the second one defines circular detection regions in the DCT domain. A rule for generating the DCT parameters of distinct watermarks is provided. The watermarks embedded by the proposed algorithms are resistant to JPEG compression.
Keywords :
"Watermarking","Discrete cosine transforms","Transform coding","Digital images","Compression algorithms","Informatics","Image coding","Computer networks","Protection","Digital signatures"
Publisher :
ieee
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Print_ISBN :
0-7803-3259-8
Type :
conf
DOI :
10.1109/ICIP.1996.560426
Filename :
560426
Link To Document :
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