外文翻译---基于数字水印技术的信息隐藏理论研究.docxVIP

天津工业大学本科毕业论文 外文资料 Information Hiding Thieoretic Research Based on Digital Watermark Technology School of Mathematics and Computer Science Ningxia Universit Abstract-With rapidly growing interest in ways to hide information, a large number of schemes have been proposed for audio and other multimedia in digital pictures, video, audio and other multimedia objects.In an attempt to overcome this problem, watermarking has been suggested in the literrature as the most effective means for copyright protection and authentication .The main focus of this thesis is the problem of watermarking and compression of image due to bandwidth or storage constraints. Keywords: information hiding; digital watermarking; transparency; robustness Introduction Due to the rapidly development of the Interest and the World-Wide-Web(WWW),distribution of digital multimedia data to a large population of users can be done very easily.Moreover,digital data can be duplicated very fast and without any degration in quality-cinsider,for example,how common the copying of musical CDs has become in the last few years.Naturally,this situation has raised many concerns about possible violations of intellectual property rights.Unauthorized duplication and distribution of copyrighted material(photographs,music,movies,etc.),without appropriate compensation to the copyright holders,are becoming increasingly problemtic.In order to fight piracy,many companies(especially in the entertainment and news industries)have devoted considerable attention to the development of information hiding (or watermarking)techniques.In plain terms,a watermark is a signal which is hiden inside some multimedia data,and carries information about this data(e.g.,owner,title,data of creation,ect).Thus a watermark uniquely identifies the work being protected,and helps resolve disputes about the ownership of the data. There have been many instances of disputes or litigations on the intellectual ownership of multimedia data.A copyright violati