基于图像置乱与重复嵌入的鲁棒水印技术  

Robust watermark technology based on scrambling and multi-embedding

作　　者：陈鹤峰[1] 曾文曲[1] 聂笃宪[1] 

机构地区：[1]广东工业大学应用数学学院,广东广州510090

出　　处：《计算机应用》2005年第2期412-413,共2页journal of Computer Applications

基　　金：广东省基金项目(200332475)

摘　　要：从嵌入、提取两方面对水印技术加以改进,提出了数字水印的重复嵌入算法,即将一位水印信息多次重复嵌入到原始图像DCT系数的直流、中频和低频系数中。提取水印时,不是简单的求多个提取值平均值,而是采用一种自学习的提取方法,更好满足了水印的要求。A watermark algorithm was improved in embedding and extracting. One watermark pixel was embedded many times into DC, mid-frequency and low-frequency coefficients of the same DCT block. What it dose was not averaging watermark values extracted from one block, but applied a self-studying method to get the last watermark. The watermark system is more preferable.

关 键 词：数字水印 DCT 置乱 重复嵌入 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]