摘要
针对大多可逆信息隐藏算法嵌入容量较小、通用性差、运算量大等问题,文中在研究图像插值和可逆信息隐藏技术基础上,设计了两种简单高效可逆信息隐藏算法,首先设计了一种类线性图像插值方法,通过对插值数据分析测试,给出理想插值图像的期望插值,以期望插值为目标,根据载体图像大小和秘密信息长度共同确定出嵌入量控制阈值,再由混沌序列动态生成每个插值像素中可嵌入秘密信息位数,实现秘密信息嵌入,然后通过差值调整因子使最终插值最大限度接近期望插值,保证载密图像有较高质量,整个过程无附加信息、无数据溢出、且能保证可逆性。当采用恒定量嵌入时,嵌入率为0.75*T bit/pixel,T∈[1,4]最大嵌入率可达到3 bit/pixel;采用随机量嵌入时,可调节性更强,秘密信息更为分散,载密图像质量更高。选取不同载体图像、在不同参数环境下对本文算法进行了大量实验,并与5个优秀算法作了对比,算法有一定优越性。
Because most of the reversible information hiding algorithms have low embedding capacity,poor universality and large computation,in order to design better reversible information hiding algorithm,two information hiding algorithms are designed on the basis of image interpolation and reversible information hiding.Firstly,a kind of linear image interpolation method is designed,and the expectation interpolation of the ideal interpolated image is given.The embedded quantity control threshold is determined according to the size of the carrier image and the length of the secret information,then the secret information can be embedded in each interpolation pixel dynamically by the chaotic sequence,and then the difference adjustment factor is used.It makes the final interpolation close to the expected interpolation.The whole process has no additional information and no data spillover,and can guarantee the reversibility.When the constant amount of embedding is used,the embedding rate is 0.75*T bit/pixel,where T∈[1,4],and the maximum embedding rate can reach 3 bit/pixel.When the random quantity is embedded,the adjustment is stronger,the secret information is more dispersed,and the quality of the encrypted image is higher.Alot of experiments are carried out on this algorithm in different carrier images and in different parameters,and compared with the 5 excellent algorithms,the algorithm has some advantages.
作者
王继军
孙泽锐
李国祥
夏国恩
WXNG Ji-jun;SUN Ze-rui;LI Guo-xian;XIA Guo-en(Office ofAcademicAffairs, Guangxi University of Finance Economics, Nanning 530003 China;Departmentof Informati on and Statistics, Guangxi University of Finance Economics, Nanning 530003 China)
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2019年第2期175-184,共10页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(71862003)
广西自然科学基金(2015GXNSFBA139255)
广西高校中青年教师基础能力提升项目(2018KY0518)
广西财经学院2016年度重点学科建设研究项目(2016KY28)
广西财经学院数量经济学重点实验室项目(2014SYS17)
广西财经学院科研项目(2016B033)
广西多源信息挖掘与安全重点实验室开放基金项目(MIMS18-05)
广西应用经济学一流学科(培育)开放性课题(2018YB01)
广西(东盟)财经研究中心开放性课题(2018DMCJYB10)资助项目
关键词
信息安全
图像插值
信息隐藏
可逆信息隐藏
information security
image interpolation
data hiding
reversible data hiding
