数字图像区域复制篡改的盲取证技术研究进展

Research Advances on Blind Forensics Technology of Digital Image Region Duplication Forgery

由于盲取证技术不需要任何预先嵌入的认证信息,而仅根据图像本身的统计特性就能鉴别数字图像的原始性、真实性和完整性,已经成为数字媒体安全领域的研究热点.文中介绍了数字图像中常见的区域复制篡改方式,分析实际篡改过程中可能涉及到的图像处理操作,总结归纳了区域复制篡改盲取证方法的一般流程.最后,指出现有目前方法存在的问题,并对盲取证技术未来的研究方向进行展望.

Blind forensics technology has become a hot research topic in the field of digital media security, due to the ad- vantage that it does not need any authentication information embedded in advance, only to identify image primitiveness, authenticity and integrity according to the statistical features of the image itself. In this paper, region duplication which is a common forgery in digital images is introduced. The image processing operations which may be involved in the practical tampering are analyzed. The general process of blind forensics method for detecting region duplication forgery is summa- rized. Finally, limitations existing in available methods are analyzed, and perspectives of further research work on blind forensics technology are presented.