具有认证功能的JPEG图像强鲁棒水印算法  

Strong robust watermarking algorithm for JPEG image with authentication function computer engineering and applications

作　　者：石杰 李子臣[1] Shi Jie;Li Zichen(Beijing Institute of Graphic Communication,Beijing 102600)

机构地区：[1]北京印刷学院,北京102600

出　　处：《网络空间安全》2018年第7期47-53,共7页Cyberspace Security

摘　　要：针对现有一些误码率高且不具有图像认证功能的鲁棒水印算法,论文提出了一种基于离散余弦变换(DCT)、纠错编码和可恢复数字签名水印算法。算法利用具有消息恢复的数字签名和Reed-Solomon纠错编码生成水印信息,然后对载体图像进行分块DCT变换,选取每块中频区域,按照一定规则嵌入水印。实验结果表明,结合纠错编码技术算法对常见的如JPEG有损压缩、噪声、滤波等攻击均具有强鲁棒性。利用具有消息恢复的数字签名方案,提取出水印信息经验证,进而达到水印图像认证的目的。Aiming at some robust watermarking algorithms with high bit error rate and no image authentication function, this paper proposes a discrete cosine transform （DCT）, error correction coding and recoverable digital signature watermarking algorithm. The algorithm uses the digital signature with message recovery and Reed-Solomon error correction coding to generate watermark information, then performs block DCT transformation on the carrier image, selects each IF region, and embeds the watermark according to certain rules. The experimental results show that the algorithm combined with error correction coding technology is robust to common attacks such as JPEG lossy compression, noise and filtering. The digital signature scheme with message recovery is used to verify the extracted watermark information to achieve the purpose of watermark image authentication.

关 键 词：数字图像水印 离散余弦变换 消息恢复 数字签名 Reed-Solomon纠错编码 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]