DWT-Based Watermarking Scheme for Digital Images  

作　　者：何泉 苏广川 

机构地区：[1]Department of Electronic Engineering

出　　处：《Journal of Beijing Institute of Technology》2003年第2期134-137,共4页北京理工大学学报（英文版）

摘　　要：A watermarking scheme for digital images is introduced. This method is based on discrete wavelet transform and spread spectrum technique. A discrete wavelet transformed binary signature image is expanded by an m sequence and added to the large wavelet coefficients of a host image with a scale factor. Good balance between transparency and robustness is achieved by the selection of the scale factor. In addition, the spread spectrum technique is adopted to increase the robustness of this watermarking scheme. The experimental results show that the proposed method is of good performance and robustness for common image operations such as JPEG lossy compression, etc.A watermarking scheme for digital images is introduced. This method is based on discrete wavelet transform and spread spectrum technique. A discrete wavelet transformed binary signature image is expanded by an m sequence and added to the large wavelet coefficients of a host image with a scale factor. Good balance between transparency and robustness is achieved by the selection of the scale factor. In addition, the spread spectrum technique is adopted to increase the robustness of this watermarking scheme. The experimental results show that the proposed method is of good performance and robustness for common image operations such as JPEG lossy compression, etc.

关 键 词：digital watermarking discrete wavelet transform spread spectrum 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]