摘要
为提高数字水印的鲁棒性和不可见性,提出了一种基于QR分解和DNA序列的双彩色图像盲水印算法。首先利用DNA编码和耦合映射格子CML对彩色水印图像进行加密;然后将彩色宿主图像分割为4×4非重叠像素块,对每个像素块进行QR分解;最后通过改变矩阵R中第一行各数值关系,将DNA序列加密水印嵌入到宿主图像中。根据水印信息嵌入过程,设计相应的水印提取方案,在不依靠宿主图像和原始水印数据信息的情况下,从嵌入水印后的图像中提取水印图像。实验结果表明,该水印方案不仅透明度高,而且有较好的鲁棒性。
In order to improve the robustness and invisibility of digital watermarking, a double color image blind watermarking scheme based on QR decomposition and DNA sequence is proposed . Firstly, the color watermark image is encrypted by DNA and CML, secondly, the color host image is divided into 4x4 non-overlapping pixel blocks, and QR is performed on each selected pixel block to get the matrix R. Thirdly, the DNA sequences encrypted watermark is embed into the host image by modifying the matrix R. The watermark can be extracted from the watermarked image without resorting to the host image and the original watermark. Experimental and analysis show that the watermarking scheme has not only better imperceptibility but a strong ro- bustness.
出处
《软件导刊》
2017年第9期83-86,共4页
Software Guide
