摘要
考虑到算法的复杂度,如何加以控制,把水印只嵌入在图像视觉掩蔽性较强的区域,是水印技术研究的热点问题之一。文章提出了一种基于模糊控制的图像水印有选择性嵌入算法。该算法通过定性分析图像视觉掩蔽性的强弱,采取似末位淘汰的模糊控制规则来选择掩蔽性较强的区域,然后直接嵌入水印,在提高水印图像保真度的同时,克服了基于隶属度嵌入算法计算复杂、对噪声以及孤立点数据比较敏感等缺点。计算机仿真结果验证了文中算法的有效性。
One of the important digital watermarking research topics is that how to reduce the complexity degree of the algorithm, and simultaneously make watermarking information embedded where the image block has a large visual masking value. A novel digital image watermarking algorithm based on fuzzy theory is proposed in this paper. After the qualitative analysis of the image visual masking value, the presented algorithm discards the image block of the smaller visual masking value by means of the fuzzy control rule, and then embeds the watermarking information directly. This method improves the image fidelity, and at the same time overcomes some drawbacks of the existed watermarking algorithm based on the subjection degree, including the computational complexity and sensitivity to the noise and isolated point. Computer simulations show its effectiveness.
出处
《计算机与数字工程》
2010年第1期151-154,共4页
Computer & Digital Engineering
