Research on Correction Algorithm for Print-scan Resistant Digital Watermarking Algorithms Based on DWT

摘要：

　　On the basis of the analysis of the second layer of DWT high amplitude coefficients before and after printing and scanning,we propose a correction algorithm for Print-scan resistant Digital Watermarking Algorithms Based on DWT.This correction algorithm corrects in the frequency domain,multiplying the coefficients by a correction coefficient and determining the best correction coefficient by Kolmogorov-Smirnov test.Contrast with two common methods to correct the distorted pixels:brightness transformation and contrast stretching transformation,this correction algorithm has the character of less calculation and takes the influence of print and scan on the surrounding pixels into account.At last,after applying it to several test images and all the NC values becoming bigger,the proposed correction algorithm is proved to be effective and universal.

关键词： DWT Print-scan resistant Digital Watermarking Correction Kolmogorov-Smirnov test

作者: ZHANG Zhenjie LIU Zhen YU Hui

作者单位: College of Communication and Art Design, University of Shanghai for Science and Technology, China

会议类型: 国际会议

会议名称: the 2nd China Academic Conference on Printing and Packaging (2012第二届中国印刷与包装学术会议(CACPP 2012))

会议地点: 北京

会议语种:英文

页码: 172-176

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）