摘要
为了完善光无线传输系统的版权保护、隐蔽通信等功能,需要进行光无线传输下隐秘图像可逆信息隐藏方法研究。但是采用当前方法进行信息隐藏时,无法保障隐藏信息的完整性,存在信息隐藏精度低的问题。现提出一种基于整数变换的光无线传输下隐秘图像可逆信息隐藏方法。所提方法先利用密钥设置原始图像中每个像素的比特位,给出不同像素的波动值,选取相应的灰度像素组进行变换,并对变换后的像素组进行溢出检验,获取用于嵌入额外信息的像素组,促使信息隐藏者通过替换其对应的LSB将额外信息嵌入到加密图像中,完成对光无线传输下隐秘图像可逆信息隐藏。仿真证明,所提方法信息隐藏精度高,可以为完善光无线传输系统的版权保护、隐蔽通信等功能提供可行的依据。
A reversible information hiding method for secret image under optical wireless transmission is presented based on integer transform. The secret key is used to set bit of each pixel in original image, and the fluctuating value of different pixels is provided. Then corresponding pixel group of gray scale is selected and overflow check for the transformed pixel group is carried out. In addition, the pixel group used for imbedding extraneous information is ac- quired to prompt information hider to imbed the extraneous information into encryption image through replacing its cor- responding LSB. Thus, the reversible information biding is completed. Simulation proves that the method has high precision of information hiding. It can provide feasible gist for perfecting function of system of optical wireless trans- mission such as copyright protection and covert communication.
出处
《计算机仿真》
北大核心
2017年第5期201-204,共4页
Computer Simulation
关键词
光无线传输
隐秘图像
可逆信息隐藏
Optical wireless transmission
Secret image
Reversible information hiding
