%0 Journal Article
%T A Study of Digital-image Watermarking Technique Based on LDPC<br>基于LDPC码的数字图像水印技术研究
%A HUO Zhi-yong
%A ZHU Xiu-chang
%A <br>霍智勇
%A 朱秀昌
%J 中国图象图形学报
%D 2007
%I 
%X The goal of this paper was to investigate the application of the LDPC codes in Digital image watermarking.Based on the analysis of the equivalent channel in the digital watermarking system,a watermarking technique for digital image on the basis of LDPC code is proposed.The algorithm embeds and retrieves the watermark signature into and out of the static image by employing the LDPC code technology and the human visual characteristics.The results demonstrate that the proposed technique has greatly decreased the error code rate of the retrieved watermark and improved the robustness and invisibility.
%K digital watermark
%K low density parity check code
%K DCT<br>数字水印
%K 低密度奇偶校验码
%K 离散余弦变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=DDEBDCBBD7663DA9F49F719E4C2E9FC4&yid=A732AF04DDA03BB3&vid=59906B3B2830C2C5&iid=708DD6B15D2464E8&sid=EA357AD73C8E13BC&eid=E6A891D2134F30C0&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=5