%0 Journal Article
%T A New Anti-counterfeiting Technology of Social Security Card Based on UGM and Digital Watermarking<br>一种基于UGM模型和数字水印的社保卡防伪技术
%A LI Feng
%A WANG Huan-chen
%A LIU Jing-yan
%A <br>李峰
%A 王浣尘
%A 刘静岩
%J 系统工程理论与实践
%D 2005
%I 
%X We present a new anti-counterfeiting technology of social security card based on UGM and digital watermarking. Firstly, the grey scale of watermark image is converted to range (-3,3) using UGM. Secondly, the converted watermark image is added to the middle-frequency range of transformed cover image. Finally, we abstract the watermarking image using inversed wavelet transform and UGM. Then we can judge if the card is valid. The experiment result shows good visual quality both the embedded cover image and the reconstructed watermark image with high computing speed. So the method is applicable.
%K social security card
%K undulating grey model (UGM)
%K discrete wavelet transform (DWT)
%K digital watermarking<br>社保卡
%K 灰色摆动模型
%K 离散小波变换
%K 数字水印
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=962324E222C1AC1D&jid=1D057D9E7CAD6BEE9FA97306E08E48D3&aid=70D592E08330A774&yid=2DD7160C83D0ACED&vid=C5154311167311FE&iid=94C357A881DFC066&sid=AE09EACBCD1B2A13&eid=6FBD78E3BAB60869&journal_id=1000-6788&journal_name=系统工程理论与实践&referenced_num=0&reference_num=7