%0 Journal Article
%T Adaptive digital watermarking algorithm based on energy analysis of wavelet coefficients block<br>基于小波系数块能量分析的自适应数字水印算法
%A ZHU Xing-li
%A ZHANG Jia-shu
%A <br>朱兴力
%A 张家树
%J 计算机应用
%D 2006
%I 
%X To enhance the robustness of watermark, an improved digital watermarking algorithm based on wavelet transform was proposed. The third level detail sub-images decomposed the original image using three levels DWT(Discrete Wavelet Transform) were divided into non-overlap blocks. Then the blocks, which were more adaptable to embed watermark, were selected by block energy analysis. At the end, combining with the properties of human visual system, the watermark was adaptively embedded into the largest coefficients which belonged to the selected blocks. Theoretical analysis and experiment results show that the watermark generated with the proposed algorithm is imperceptible and more robust.
%K digital watermarking
%K wavelet transform
%K block energy
%K visual masking<br>数字水印
%K 小波变换
%K 块能量
%K 视觉掩盖
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=831E194C147C78FAAFCC50BC7ADD1732&aid=3278635345BABF61&yid=37904DC365DD7266&vid=96C778EE049EE47D&iid=E158A972A605785F&sid=CE16DE2ABCD4D365&eid=AB1DE136C335A86C&journal_id=1001-9081&journal_name=计算机应用&referenced_num=10&reference_num=8