【摘要】 基于混沌序列的优良性能,提出了混沌序列和PCA相结合的数字水印算法。首先对图像进行PCA变换,在去除噪声的前提下提取最能代表图像特征的特征系数,然后利用混沌映射生成混沌序列作为数字水印,水印嵌入在主成分系数上。实验表明,该算法具有很好的不可感知性,对常见的加噪、滤波、剪裁等攻击有较强的鲁棒性。更多还原

【Abstract】 A digital watermarking algorithm is proposed based on good performance of chaotic sequence.Which combinations chaotic sequence with principle component analysis(PCA).Firstly,PCA transform is used to remove noise and extract principle components of image,which can most represents image features.Then chaotic sequence is generated as digital watermarking.Watermarking is embedded in principal component coefficient.Experimental results show that the proposed scheme has good imperceptibility and good robustness against some usual attacks such as adding noise,filtering and cropping and so on.更多还原