学术讲座【Applying De-clustering Concept to Information Hiding】 - 福建师范大学论坛

专家简介：张真诚，博士，台湾逢甲大学讲座教授，台湾中正大学荣誉教授，台湾清华大学合聘教授。他对于信息安全、密码学与多媒体图像处理三大领域进行了长期而深入之研究，在国内外学术期刊、国际学术会议上发表学术论文100余篇、学术专书36册，根据Google Scholar的统计，被引用18000余次，h影响因子为63次。主持各类科研项目110余项，获17项专利（含1项美国专利和2项中国专利）。获聘海内外近50所著名大学之客座教授、名誉教授和讲席教授。1998年当选为国际电子电机工程师学会（IEEE）会士与英国电机工程师学会（IET）会士。指导博士生56人、硕士生160人。他创立了“台湾信息安全学会”，该学会为台湾目前最重要的学术研究团体之一，在担任信安学会理事长期间，他发起全国信息安全会议，该会议是台湾最重要的信息学术会议之一，迄今已经办理二十六届了。

报告摘要：Reversible steganography allows an original image to be completely restored after the extraction of hidden data embedded in a cover image. In this talk, I will talk about a reversible scheme based on declustering strategy for VQ compressed images. The declustering can be regarded as a preprocessing step to make the proposed steganographic method more efficient. Our experimental results show that the time required for the embedding process in the proposed method is few. In addition, the reversible steganography allows an original image to be completely restored after the extraction of hidden data embedded in a cover image. In this paper, we propose a reversible scheme for VQ-compressed images that is based on a declustering strategy and takes advantage of the local spatial characteristics of the image. The main advantages of our method are ease ofimplementation, low computational demands,and no requirement for auxiliary data.