数字图像水印研究

Research on Digital Image Watermarking

随着信息时代的来临,特别近些年互联网和智能手机的全面普及,图像的版权问题不断显现。图像的版权容易受到侵犯,研究图像版权保护技术是当务之急。数字图像水印技术应运而生,成为信息安全方面研究的一个热点。基于MATALB软件,完成了数字图像水印算法程序设计。首先介绍了数字水印的发展和背景,然后分析了数字图像水印的基本原理。在水印图像的预处理方面,介绍了基于Arnold的水印加密技术,分别对水印嵌入位置,嵌入强度系数等进行了讨论,以实现水印系统的最优化。研究了水印嵌入和水印提取相关算法,对水印系统进行攻击,并完成了稳定性测试。测试结果表明,该算法对图像剪切、噪声和压缩攻击有较强的鲁棒性,能够满足实际需求。

With the advent of the information age,especially in recent years the popularity of the Internet and mobile phones,image copyright issues appears constantly.Image copyright is vulnerable to infringement,the research of image copyright protection technology is very important.Digital image watermarking technology come into being,and become a hot topic in information security research.Based on MATALB software,this paper completes the program design of digital image watermarking algorithm.This paper introduces the development and background of digital watermark,and then analyzes the basic principle of digital image watermarking.In the preprocessing of watermarked images,the watermarking encryption technology based on Arnold is introduced,and the watermark embedding position and embedding strength coefficient are discussed respectively to realize the optimization of watermarking system.The watermark embedding and watermark extraction algorithms are studied,the watermarking system is attacked,and the stability test is completed.The test results show that the algorithm is robust to image clipping,noise and compression attacks,and can meet the actual requirements.