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基于CL多小波的数字水印技术

DOI: 10.11834/jig.200305185

Keywords: 数据安全与计算机安全(520?1060),数字水印,CL多小波,相关度,鲁棒性,透明性

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Abstract:

数字水印是一种嵌入到图象、视频或者音频数据中的不可见标志,通过对水印信息的检测可达到保护多媒体数据版权的目的.为了提高数字水印系统的鲁棒性,提出了一种基于CL多小波变换的图象数字水印嵌入和检测模型.该CL多小波变换可将图象的能量集中在其最低分辨率子图象上,同时,能使最低分辨率子图象的能量进一步汇聚于其第1个分量之上.由于最低分辨率子图象受压缩、滤波等变换的影响较小,因此在CL小波变换域嵌入数字水印可以改善水印系统的鲁棒性.为了提高水印的透明性和不可统计性,在嵌入水印之前需要对水印图象进行相应的预处理.实验表明,该水印系统具有良好的鲁棒性和透明性.

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