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Image searching and authentication have become strong requirements in the digital world. Image perceptual hashing has been proposed to meet them. In this paper, a rotation resilient image hashing algorithm is presented. In the algorithm, the position information of original image is extracted to adjust the rotation. Then the features of the image are extracted by contourlet transform. The key-dependence...
Perceptual hashing as a new technique for the multimedia content security have been widely discussed.However, the robustness requirement of perceptual hashing brings big challenges to its security. In this paper, we propose a secure enhancement scheme for image perceptual hashing based on error correction coding. By employing error correcting code, images with similar perceptual contents can be mapped...
An arbitrarily rotated image should not be recognized as a different one, but the conventional image perceptual hashing algorithms can only deal with this partially. Different to watermarking, image perceptual hashing does not need to embed information into the image content, this make it possible that perceptual hashing can treat the synchronization problem in a new manner. In this paper, three cyclic...
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