%0 Journal Article
%T Research on Technology of Image Watermark of Grid<br>网格图像水印技术的研究*
%A XIAO You-an
%A YANG Yi-hong
%A <br>肖攸安
%A 杨毅红
%J 计算机应用研究
%D 2007
%I 
%X Aiming at the problem of copyright protection of digital multimedia documents in the gird environments,author proposed a meaningful digital watermarking algorithm which could be used in the gird environments.It decomposed and reconstructed a digital image using multi-resolution ratio of wavelet transform based on the discrete wavelet transform and digital spread spectrum technology.Experiments show that choosing frequency domain to embed watermarking can gain image fidelity better and have more robustness than watermarking embedded algorithm in space domain.
%K gird
%K digital watermarking technology
%K meaningful digital watermarking
%K discrete wavelet transform
%K spread spectrum technology<br>网格
%K 数字水印技术
%K 有意义数字水印
%K 离散小波变换
%K 扩频技术
%K 格图像
%K 水印技术
%K 研究
%K Grid
%K Watermark
%K Image
%K Technology
%K 空域
%K 图像保真度
%K 嵌入水印
%K 选择
%K 验证
%K 检测
%K 数字扩频技术
%K 分解和重构
%K 小波变换
%K 特性
%K 多分辨率
%K 利用
%K 水印算法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=EF4AD2E7BFCF0B308FCFF4E239866B96&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=51C74DF6A16DA45B&eid=A2745AA1110798CA&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=12