With the wide application of camera equipment, digital image, as an important information carrier, has gradually integrated into me their lives. With the popularity of image editing software, people have to re-examine seeing is believing ideas. In recent years, there have been frequent incidents of image fraud in the fields of news media, judicial notarization and scientific research. Therefore, judging the authenticity and originality of digital images has become an urgent problem to be solved in the field of forensics. Tamper often change the image and its information through different image operations which affecting the reader's authenticity of things. Therefore, it is of great significance to detect the operation history of digital images. Based on the above research background, this paper first summarizes the research status of image operation forensics algorithm, and then obtains evidence from digital image muti-operation. The accuracy, practicability and robustness of the algorithm are proposed. In this paper, an image muti-operation forensics method with JPEG robustness is proposed. Experiments show that this method has a good performance in JPEG robust detection with high quality factor and low quality factor.

ABSTRACT
1. Introduction
    1.1 Background and significance
    1.2 Image mosaic
    1.3 Introduction to Digital Image Forensics
    1.4 Related Work
2 Experimental processes
    2.1 Algorithm design
    2.2 Experimental data and network parametersetting
3. Analysis of experimental results
4. Conclusions
References

• Sandeep Gupta(Director, Oxford International Studies, Oxford OX1, 2JD, United Kingdom) Corresponding author