一种DCT域水印嵌入与提取算法研究

摘要

The watermark embedded into DC coefficient of DCT domain has strong robustness in theory. The advantage of meaningful binary image is that its meaningful is intuitional. A watermark embedding,detecting and extracting algorithm of meaningful binary image based on DCT domain is presented in this paper. The binary watermark image is used to modulate pseu⁃do⁃random sequence to produce the watermark sequence. The host image is segmented and classified. The watermark is embed⁃ded into the DC coefficient of DCT domain. The embedding,attacking and extracting simulation experiment show that the water⁃mark embedded by this algorithm has good robustness and invisibility.%　　理论上，讲在DCT域的DC系数嵌入水印有更好的鲁棒性，而有意义二值图像的优点在于意义直观的。在此提出了一种DCT域的有意义二值图像水印嵌入和检测、提取算法。用二值水印图像调制伪随机序列生产水印序列，将宿主图像分块并分类，水印嵌入到DCT域的DC系数。仿真试验了嵌入、攻击和提取过程，表明该算法嵌入的水印有比较好的鲁棒性和不可见性。