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This paper proposes a method that incorporates secret image sharing with progressive transmission based on the integer discrete cosine transform (IntDCT). The idea is to apply IntDCT coefficients after a combination process as input of the (r, n)-threshold model instead of directly sharing the secret pixels. A coarse version of the secret image can be decrypted by Lagrange interpolation with a small...
Image hashing function maps an image into a bit string which can be used to authenticate the originality of the image. In this paper, we propose a perceptual image hashing scheme that is secure and robust to visually insignificant changes but fragile enough to detect and precisely locate malicious attacks. The proposed image hashing method is based on the outlines of one-dimensional signals re-arranged...
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