A Wavelet-based Watermarking Scheme Using Double Wavelet Tree Energy Modulation

Abstract

Wavelet tree based watermarking algorithms arc generally using the energy difference among grouped wavelet coefficients for invisible watermark embedding and extraction. According to the cryptanalysis of wavelet tree quantization (WTQ) scheme, its robustness has been proven weak and modified wavelet tree quantization (MWTQ) is developed consequently. However, MWTQ needs the wavelet tics group data as the extra information and MWTQ is rot blind for watermark extraction. Therefore, a novel wavelet tire. watermarking using double wavelet tree energy modulation is proposed in this study. This study has performed intensive comparison for the proposed scheme with WTGM and MWTQ under various signal processing attacks. The experiment results demonstrate that the proposed technique yields better performance with higher degree of robustness than WTQ.