A New Digital Watermarking Scheme for Image Copyright Protection using Wavelet Packets
http://ieeexplore.ieee.org/xpl/freea...number=1572166
Digital Watermarking and its Application in Image Copyright Protection
http://ieeexplore.ieee.org/xpl/freea...number=5523112
A robust wavelet-based watermarking scheme for copyright protection of digital images
http://ieeexplore.ieee.org/xpl/freea...number=5591586
Giúp mình 3 bài này . Thank các bạn