摘要
首先提取原图像基于视觉注意模型的显著图,然后通过NMF分解得到降维显著图作为灰度水印图像,之后通过混沌加密算法对水印图像进行置乱,将置乱后的水印信息通过DCT-SVD变换嵌入原图像的低频分量中。在接收端,对接收到的图像进行水印提取和解密操作得到原始灰度水印图像,即原图像的显著图,同时提取接收图像的显著图,通过对比原图像显著图与接收图像显著图的差异性,利用基于Lorenz曲线的差异算法与合理阈值判断接收图像是否受到噪声干扰或人为篡改。与其他类似算法的对比结果表明,该算法针对噪声干扰与人为篡改有着很好的区分性。
First,the saliency is extracted from the original image based on visual attention model.Then,the image is decomposed by Non-negative Matrix Factorization（NMF）to reduce the dimension and scrambled by chaotic encryption.The decomposed saliency map is embedded into the frequency component of the original image by DCT-SVD transform.At the receiving terminal,the watermarking is extracted from the received image,and the saliency map of the received image is also extracted.Finally,comparison of the difference between the received image＇s saliency map and watermarking,the Lorenz curve and the reasonable threshold are used to determine whether the received image is changed by noise or artificial tampering.Compared with other similar algorithms,the proposed algorithm has good discrimination against noise interference and artificial tampering.
作者
赵博
秦贵和
ZHAO Bo QIN Gui-he(College of Computer Science and Technology, Jilin University, Changchun 130012,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2017年第1期249-254,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
吉林省科技发展计划项目(20150204034GX)
