摘要
采用灰度图像为水印信息,对基本离散余弦变换域图像数字水印算法进行改进,为保证信息的安全性,在嵌入宿主图像之前结合Arnold变换进行加密。通过在图像块离散余弦变换域中修改中频区来嵌入不同强度的水印。实验结果证明该算法提高了水印检测的准确性,并且该算法具有较好的不可见性和鲁棒性。
The binary image is adopted as watermarking information,and the basic digital watermarking algorithm in DCT domain is improved.In order to ensure the security of the information,Arnold transform is employed to encrypt the binary image before its embedment into the primary image.Different strength watermarking is embedded by modifying intermediate frequency region in DCT domain of the corresponding image block.Experiment indicates that the algorithm could raise the detection speed,and is of fairly good imperceptibility and robustness.
出处
《通信技术》
2010年第4期223-224,227,共3页
Communications Technology
基金
河南科技大学人才科学研究基金资助项目(No0609)
