%0 Journal Article
%T Self-adaptive semi-fragile digital watermarking algorithm<br>具有自适应性的半脆弱数字水印算法*
%A FAN Yong-liang
%A ZHANG Hui-min
%A ZHANG Yun-long
%A <br>樊永良
%A 张会敏
%A 张云龙
%J 计算机应用研究
%D 2011
%I 
%X In order to solve the contradiction between robustness and vulnerability of digital watermarking algorithm, this paper proposes a new self-adaptive semi-fragile digital watermarking method, with emphasis on digital watermarking embedding algorithm. By using improved low-pass filter, this algorithm adjusts gray value of middle pixel and changes gray-value differential of two terminal to embed the digital watermark. The experimental results show that this algorithm has strong robustness on all JPEG compression of Photoshop and has vulnerability for all geometric transformation malicious attacks. And from the extracted watermark, it can judge the characteristics of malicious attacks, such as types, extent and region. This algorithm shows good adaptability.
%K watermarking
%K semi-fragile
%K low-pass filter
%K gray-value differential
%K gradient threshold
%K self-adaptive<br>数字水印
%K 半脆弱
%K 低通滤波器
%K 灰度差分
%K 梯度阈值
%K 自适应性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=490DF79134BA36C7A5177519CFABDEA4&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=4ED782DFCB910AF4&eid=C4B945B776D5CA8F&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=9