摘要
为了避免过多的水印信息嵌入导致原图像质量下降以及一般加密方法的安全性不高的问题,利用离散余弦变换中空域任何一点的变化都会对频域造成影响的特性来对微小篡改进行监督。因此以参考文献[2]中的DCT域系数嵌入关系为基础,提出了相应的基于超混沌序列加密的随机嵌入脆弱水印算法。本算法在检测水印时不需要原图像。而且本算法具有良好的不可见性、保密性及对修改具有很强的敏感性。
In order to prevent the quality of the image decrease from too much watermark information embedding and resolve that low security of the general encryption method, use the characteristic that any change in spatial domain will influence frequency domain during transforming to supervise the small distortion. So based on the relationship of DCT embedding on the paper[ 2 ], a fragile watermark based on chaos array and random embedding method is propose. In the process of extracting watermark, this arithmetic can achieve blind watermark technology. The water mark is invisible and the system is very secure and sensitive to the small distortion.
出处
《计算机技术与发展》
2006年第10期145-148,共4页
Computer Technology and Development
