Digital Image Steganography Based On HVS Technology Research

The development of computer and Internet industry contributes to the transformation and upgrading of enterprises.Big data,cloud computing,artificial intelligence technology is becoming mature so all fields of society become intelligent gradually.Every day we created tens of thousands of data,at the same time,the data is changing our way of life.Nowadays data increasingly surges,which leads to huge data information spreads on the Internet which is open and shared,network information security has become a big hidden issue.The traditional encryption technology seems particularly vulnerable for hackers,viruses and other threats,however steganography is developed quickly in multimedia digital era as a more advanced information security technology.Different from the traditional encryption technology,digital image steganography technology,which uses the human visual redundancy will lead to the achievement that information can be embedded into the carrier image,therefore the development of digital image steganography is closely combined with the human visual system.The purpose of this paper is to study how the traditional steganography algorithm combines with visual perception to achieve better results,and there will be a new evaluation index which human eye cannot perceive almost by using the human visual characteristics.In this paper,the main content of the research is based on the following three aspects:1.According to the fact that present traditional steganography evaluation index and steganalysis algorithms do not match,this paper proposes a kind of steganalysis evaluation index which is more suitable for human eye perception..The evaluation index combined human visual masking characteristics with the carrier characteristic of the digital image steganography,which can strengthen the human visual perception fot local image features.Experiment results show that the evaluaction index is more suitable for visual perception with lower complexity.2.In view of fact that existing diamond encode steganography algorithm was improved and optimized,through a combination of visual attention mechanism and the speciality that human eye is sensitive to image gray and edge,we came up with an interest area diamond steganographic algorithm(ROI-APPM)coding.Embedding secret information can be adjusted by visual attention dynamic mode on the base of low-level human eye perception judgment.Experimental results show that this algorithm not only has high visual perceptual,but also can resist steganographic analysis of traditional airspace compared with EAPPM.3.Through the analysis of the advantages and disadvantages of the steganographic algorithm based on JPEG,we proposed a frequency domain steganalysis based on modified quantizationtables and stereoscopic rhombus coding.The algorithm maintains the standard 8 x 8 quantitative table,and in the process of embedded,dynamic judgment of statistical properties of the pixel block can be done,and then the best matching embedding template can be figured out.The experimental results show that the algorithm improves the steganographic embedding capacity but it can not be perceived at the same time.