Title :
Improved watermark robustness via spectrum equalization
Author :
Liang, Te Shen ; Rodríguez, Jeffrey J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA
Abstract :
We describe and analyze an effective solution that can improve robustness for a large class of transform-domain watermarking algorithms. We present the concept of spectrum equalization for image watermarking and discuss its rationale and advantages. We demonstrate that if the watermark signal is embedded in a host image having a flat or equalized spectrum, the overall performance of the underlying algorithm can be significantly enhanced. The proposed idea is exemplified using a well-known spread-spectrum approach, and the experimental results demonstrate its effectiveness
Keywords :
copyright; image coding; security of data; spectral analysis; transform coding; algorithm performance; copyright protection; experimental results; flat spectrum; host image; image watermarking; permutation; spectrum equalization; spread-spectrum approach; transform-domain watermarking algorithms; watermark robustness; watermark signal; Algorithm design and analysis; Authentication; Computer networks; Cryptography; Distributed computing; Image analysis; Power system protection; Robustness; Watermarking; Weapons;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.859212
