改进量化表的数字水印算法  

Digital watermarking algorithm based on improved quantization table

作　　者：武丽君[1] 马巧梅[1] 陈够喜[1] 杨秋翔[1] 

机构地区：[1]中北大学电子与计算机科学技术学院,山西太原030051

出　　处：《计算机工程与设计》2013年第10期3453-3458,共6页Computer Engineering and Design

基　　金：山西省科技攻关基金项目(20090322004);中北大学校基金项目(2012)

摘　　要：为了提高数字水印算法的鲁棒性和不可见性,提出了一种基于Watson模型改进量化表的水印嵌入模型。通过对模型的实例化,得到具体的可行算法。对Watson模型和JPEG量化表自适应调节后的量化步长做"全偶数"处理,选取特定的低频位置作为水印嵌入位,采用奇偶量化达到水印嵌入的目的。通过实验仿真并对实验数据进行分析,表明了该算法的有效性。To improve the robustness and visibility of digital watermarking algorithm,an embedding watermarking mode is presented,which improves the quantization table based on Watson model.The specific and feasible algorithm can be acquired by instantiating the model.The algorithm does some adaptive adjustment on watson model and JPEG quantization table and deals quantization step-size with ＂full even number＂,then a specific low-frequency position is selected as the entrance of embedding watermarking,lastly odd-even quantization is taken to embed watermarking.The effectiveness of the algorithm is proved through experimental simulation and analysis of the data.

关 键 词：数字水印 WATSON模型 离散余弦变换 奇偶量化 Logistic变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]