Title :
Multiplicative Watermark Detection Using Locally Optimum Nonlinearity
Author :
Ye, Tianyu ; Fu, Yu ; Qu, Zhiguo ; Niu, Xinxin ; Yang, Yixian
Author_Institution :
Inf. Security Center, Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
This paper concentrates on watermark detection problem, which judges the existence of watermark. A multiplicative watermark detector using locally optimum nonlinearity is derived, based on the condition that DWT coefficients obey to a generalized Gaussian distribution. Experimental results show that the suggested detector has good performances under various situations. Finally, a method for improving its responses is suggested.
Keywords :
Gaussian distribution; discrete wavelet transforms; watermarking; DWT coefficients; generalized Gaussian distribution; locally optimum nonlinearity; multiplicative watermark detection; optimum nonlinearity; Correlators; Detectors; Discrete cosine transforms; Discrete wavelet transforms; Gaussian distribution; Information security; Intelligent networks; Signal processing; Taylor series; Watermarking; locally optimum nonlinearity; multiplicative watermark; watermark detection;
Conference_Titel :
Intelligent Information Hiding and Multimedia Signal Processing, 2008. IIHMSP '08 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-0-7695-3278-3
DOI :
10.1109/IIH-MSP.2008.79
