Title :
A maximum a posteriori identification criterion for wavelet domain watermarking
Author :
Ming, Ng Tek ; Garg, Hari Krishna
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
Detector based on maximum a posteriori probability (MAP) criterion has been introduced for identifying image watermark in the discrete cosine transform domain. This type of detector has been shown to be optimum and robust to common image processing operations. An MAP detector in the discrete wavelet transform domain is proposed. It is based on modeling the wavelet coefficients by a generalized Gaussian distribution. Numerical experiments are used to compare the effectiveness of the proposed detector with the conventional correlation detector.
Keywords :
Gaussian distribution; discrete cosine transforms; discrete wavelet transforms; image coding; maximum likelihood estimation; watermarking; MAP detector; correlation detector; discrete cosine transform domain; discrete wavelet transform domain; generalized Gaussian distribution; image processing operations; image watermark identification; maximum a posteriori probability criterion; wavelet domain watermarking; Detectors; Discrete cosine transforms; Discrete transforms; Discrete wavelet transforms; Gaussian distribution; Image processing; Robustness; Transform coding; Watermarking; Wavelet domain;
Conference_Titel :
Distributed Computing Systems Workshops, 2004. Proceedings. 24th International Conference on
Print_ISBN :
0-7695-2087-1
DOI :
10.1109/ICDCSW.2004.1284028
