基于极性的立体图像盲数字水印算法
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摘要
针对平面图像水印算法不能很好地适用于立体图像的问题,在平面图像版权保护算法的基础上,提出一种新的立体图像盲数字水印算法,并进行了仿真研究.首先将立体图像分块并定义图像块的极性,然后基于左右图像块的极性与水印信息之间的关系嵌入水印:如果水印信息是零,则需要通过改变对应图像块的极性,使得两极性相反;反之则使两极性相同.在水印提取过程中,只要判断左右图像块极性的关系即可提取水印信息,实现了水印的盲提取.攻击实验结果表明该算法是可行的、有效的.
To address the problem that the graphic image watermarking algorithm can't well apply to stereo images, a blind stereoscopic image watermarking algorithm has been proposed, and conduct simulation been studied. Firstly, the stereoscopic image is blocked and the polarity of the divided blocks are defined, and then the watermark is embedded by modulating the relationship between watermark and the polarity of the divided blocks: if the watermark information is zero, the polarity of the corresponding image block need changing to make the bipolar opposite; otherwise make the same polarities. In the process of watermark extraction, watermark information can be extracted as long as the relationship between image blocks polarity is judged, achieve the blind watermark extraction. Through related attacks experiments, the results show that the algorithm has strong robustness. The stereo image blind watermarking algorithm is feasible and effective.
To address the problem that the graphic image watermarking algorithm can't well apply to stereo images, a blind stereoscopic image watermarking algorithm has been proposed, and conduct simulation been studied. Firstly, the stereoscopic image is blocked and the polarity of the divided blocks are defined, and then the watermark is embedded by modulating the relationship between watermark and the polarity of the divided blocks: if the watermark information is zero, the polarity of the corresponding image block need changing to make the bipolar opposite; otherwise make the same polarities. In the process of watermark extraction, watermark information can be extracted as long as the relationship between image blocks polarity is judged, achieve the blind watermark extraction. Through related attacks experiments, the results show that the algorithm has strong robustness. The stereo image blind watermarking algorithm is feasible and effective.
引文
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[2] SONG B,HASSAN M M,TIAN Y,et al.Remote Display Solution for Video Surveillance in Multimedia Cloud [J].Multimedia Tools and Applications,2016,75(21):13375-13396.
[3] 明艳.基于3D相邻区域宏块相关性的多视点视频快速编码算法 [J].重庆邮电大学学报(自然科学版),2016,28(6):783-788.
[4] 李红日,方逵.基于误差扩展与像素容量评估的图像水印算法 [J].西南大学学报(自然科学版),2017,39(10):109-118.
[5] 汤永利,高玉龙,于金霞,等.基于DCT域的增益不变量化的数字图像水印算法 [J].重庆邮电大学学报(自然科学版),2017,29(2):223-231.
[6] ALI M,AHN C W,PANT M.A Robust Image Watermarking Technique Using SVD and Differential Evolution in DCT Domain [J].Optik,2014,125(1):428-434.
[7] 江烨倩,宋春霖.一种改进的伪3D-DCT域的视频零水印算法 [J].计算机工程与科学,2017,39(9):1721-1728.
[8] 程格平,凌贺飞.基于视觉模型的抗共谋指纹方案 [J].计算机工程与应用,2015,51(9):107-110,116.
[9] 张明辉,冯桂.基于纹理方向的高效视频编码鲁棒视频水印 [J].计算机应用,2015,35(9):2531-2534.
[10] 王颖,袁开国,席敏超.基于离散余弦变换的可移除数字视频水印算法 [J].计算机工程,2015,41(5):169-174.
[11] HSU L Y,HU H T.Robust Blind Image Watermarking Using Crisscross Inter-Block Prediction in the DCT Domain [J].Journal of Visual Communication and Image Representation,2017,46:33-47.
[12] 窦永梅.基于 DWT 与 DCT 的灰度水印图像嵌入算法 [J].计算机与现代化,2014(2):197-200.
[13] 高晓琴,晏勇,唐琦.基于可逆数字水印的图像认证新方法 [J].西南师范大学学报(自然科学版),2015,40(7):119-123.