APPLICATION OF NONLINEAR WATERMARK TECHNIQUES IN DIGITAL LIBRARIES  

作　　者：Zhao Jian Zhou Mingquan 

机构地区：[1]Electronic Science Department, Northwest University, Xi＇an 710069, China [2]Computer Science Department, Northwest University, Xi＇an 710069, China

出　　处：《Journal of Electronics(China)》2005年第5期524-527,共4页电子科学学刊（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China (No.60072044).

摘　　要：A digital watermark is an invisible mark embedded in a digital image that may be used for a number of different purposes including copyright protection. Due to the urgent need for protecting the copyright of digital products in digital library, digital watermarking has been proposed as a solution to this problem. This letter describes potential situations that nonlinear theory can be used to enhance robustness and security of the watermark in digital library. Some nonlinear watermark techniques have been enumerated. Experimental results show that the proposed scheme is superior to the general watermark scheme both in security and robustness in digital library.A digital watermark is an invisible mark embedded in a digital image that may be used for a number of different purposes including copyright protection. Due to the urgent need for protecting the copyright of digital products in digital library, digital watermarking has been proposed as a solution to this problem. This letter describes potential situations that nonlinear theory can be used to enhance robustness and security of the watermark in digital library. Some nonlinear watermark techniques have been enumerated. Experimental results show that the proposed scheme is superior to the general watermark scheme both in security and robustness in digital library.

关 键 词：Digital library Digital watermarking NONLINEAR Copyright protection 

分 类 号：G250.76[文化科学—图书馆学]