Digital Image Blind Forensics Research For Image Splicing

With the continuous development of computer and network technology, digital imageresources utilization rate is high. When the image media is widely used, image processingtechnology is developing rapidly to meet all kinds of image requirements. There are more andmore image editing software, making it much easier to tamper the image. Image security isfacing serious challenges. As a result, the technology of authentication used in imageinformation security arises, and is developing rapidly.As an important branch of image information security technology, digital image blindforensics technology don’t need to add the relevant certification information in the digitalimage in advance, compared to digital image forensics technology initiative. It is morepractical maneuverability. So it is high-profile.The first chapter introduces the background of the digital image forensics, and alsointroduces the classification of digital image forensics. Practical feasibility of passive andactive digital image forensics technology is emphatically compared. Then is the briefintroduction of the content and composition structure of this paper.In the second chapter, the paper defines the blind digital image forensics in detail, andintroduces the research status of digital image blind forensics, including digital imageclassification, the existing methods of blind forensics method, digital image blind forensicsmodel and system framework. This paper proposes a detailed and comprehensive theoreticalframework of blind digital image forensics after a summary and analysis of the existing blindforensics technology. It is based on blind forensics process.In order to build up effective features for image splicing blind forensics, the third chapterstudied the digital camera imaging principle and imaging process in detail, especially thecolor filter array interpolation method in the imaging process.Based on the research of blind forensics algorithm and digital camera imaging principle,the paper puts forward a new blind forensics algorithm for image splicing in the fourth chapter. The algorithm is based on correlation between pixels what is introduced by color filter arrayinterpolation.In the fifth chapter, the some problems existing in current digital image blind forensicstechnology is summarized, and the future development of the technology was prospected.