Multiresolution Watermarking Scheme Based on Chaotic Sequences
Wu Shuanhu, Tan Zheng
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract:  A multiresolution watermarking scheme is developed that makes use of chaotic sequences and wavelet transform. The procedure involves decomposition of digital image by using wavelet transform. Chaotic sequence is added to all the high-pass bands in the wavelet domain. Watermarked image is obtained by using reverse wavelet transform. When watermarked image is distorted from common image processing, it can still be identified. The method can be applied to video sequences using three dimensional wavelet transform.
Keywords: chaotic sequence;digital watermark;wavelet transform;multiresolutional detection