Abstract: In order to use cryptographic techniques to avoid the lack of data protection, this paper proposes a new watermark algorithm based on block statistics. It uses logistic chaotic sequence generator and m sequence generator to generate quasi-random number sequence. It imbeds the secret image pixels into original data in terms of a quasi-random number sequence. The statistic analysis indicates that the signal and noise ratio of watermark image is high and the secret image can be completely recovered.

Key words: quasi-random number, random interval, block statistics

摘要： 针对密码技术在数据保护方面的不足，提出一种新的数字水印算法——基于分块统计的水印嵌入算法。采用Logistic混沌序列发生器和m序列发生器产生伪随机数序列，将包含信息量较少、安全性要求较高的二值秘密图像嵌入载体图像。测试证明，该方法能使水印图像具有较高的信噪比，可完整方便地恢复出秘密图像。

关键词: 伪随机数, 随机间隔位, 分块统计

CLC Number: 

• TP309