基于混沌加密的DCT域盲数字水印算法

Based on DCT and Chaotic Encryption Blind Digital Watermarking Algorithm

该文提出了一种基于混沌加密的盲数字水印算法,对水印信息采用混沌加密,并根据载体图像在DCT域中能量分布,通过比较中频子域的能量差异来实现水印的嵌入和盲提取。实验表明,该算法具有较好的不可见性,对JPEG压缩、剪切、替换、噪声污染等图像处理均具有较好的稳健性。

Based on DCT and chaotic encryption blind digital watermarking algorithm is proposed in this paper, where the watermark is permuted by a chaotic encryption . And a new watermarking embedding method based on differential energy of the middle frequency bands of the DCT coefficients of the original image by comparing the selected subdomains is introduced in this paper. Experimental results show the proposed technique has good imperceptibility. And could survive several kinds of image processing, such as JPEG compression, cropping, switchover, noise, etc.