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Due to its simplicity and effectiveness, copy-move forgery has become a commonly used approach to forging images and detection of this behavior has attracted much attention in recent years. Usually integrated in the copy-move forgery process is the rotation operation, which makes rotation invariance a critical property of the copy-move forgery detection methods. In this paper, we propose to use screened...
When the tampered JPEG image is saved, it was re-compressed. After double compression, the amounts of some DCT coefficient values decrease greatly. The pattern can be easily detected by statistics methods. To defend this forensic method, we established a model to evaluate the security and image quality influenced by the re-compression. Base on the model, an optimized adjustment of the DCT coefficients...
The advent of digital forensic techniques imposes great challenges to the security of image disguise where tampering is involved to conceal the existence of sensitive objects in the source image. As a consequence, image interpolation that is a prerequisite step in image disguise should be adapted to be forensic resistant. This paper proposes a novel and secure interpolation method to facilitate image...
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