摘要
为了认证立体图像的完整性,提出了一种基于立体视觉掩蔽的非对称立体图像水印方法。首先,根据立体视觉特性,建立立体视觉掩蔽计算模型,设计了立体图像左右视点嵌入不同容量的非对称水印;其次,使用小波变换系数计算不同类型的恢复水印,将其分别嵌入2个或3个不同映射块,从而提高篡改恢复质量。仿真实验结果证明,该方法能够有效检测和恢复、拼接、粘贴等不同类型的篡改,并且恢复质量高于现有以及扩展的单图像水印方法。
To authenticate the integrity of stereo image, an asymmetrical stereo image watermarking scheme based on binocular suppression was proposed. Firstly, according to the features of stereo vision, the computation of binocular sup- pression model was established. The concept of asymmetric stereo image watermarking was defined that two views of stereo image were embedded with different data payloads. Then, discrete wavelet transform was employed to generate different types of recovery watermark for each block, and their copies were embedded into two or three different mapping blocks to improve the quality of recovery. The experimental results demonstrate that the proposed method can detect and recover different kinds of tamper effectively, such as collage attack, and the recovered quality is better than those of other existing and extended mono-image watermarking methods.
出处
《通信学报》
EI
CSCD
北大核心
2013年第6期57-68,共12页
Journal on Communications
基金
国家自然科学基金资助项目(61071120
61171163
61111140392
61271270
612712700)
国家科技支撑计划基金资助项目(2012BAH67F01)~~
关键词
立体图像
非对称立体图像水印
立体视觉掩蔽
篡改恢复
stereo image
asymmetric stereo image watermarking
binocular suppression
tamper recovery
