%0 Journal Article
%T WAVELET-BASED DIGITAL WATERMARKS AND COPYRIGHT PROTECTION<br>基于小波变换的数字水印及版权保护
%A Ma Shexiang
%A Liu Guizhong
%A Zeng Shaohua
%A <br>马社祥
%A 刘贵忠
%A 曾召华
%J 电子与信息学报
%D 2001
%I 
%X Digital watermarking is a new research topic about copyright protection in recent years. Watermarking is a technique for labeling digital picture by hidding secret information in the images. Sophisticated watermark embedding is a potential method to discourage unauthorized copying or attacking the images. This paper presents a technique of watermark embedding and extracting based on discrete wavelet transform of blocks in the image. Each pixel of a watermark is embedded in the wavelet coefficient of the middle and low frequency of a block in the images. Disputation about copyright can be settled down by using the watermark embedding technique presented in this paper. Both theoretical analysis and experimental results show that this technique is reasonable and satisfactory.
%K Digital watermark
%K Copyright protection
%K Wavelet transform
%K Pseudorandom permutation<br>数字水印
%K 版权保护
%K 小波变换
%K 图像处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=F4C8084043B4813C&yid=14E7EF987E4155E6&vid=EA389574707BDED3&iid=708DD6B15D2464E8&sid=47D3259DD85FC8F7&eid=8DABBEB130EFF191&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=8&reference_num=9