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DWT Based Robust Image Hashing Algorithm
Abstract
JPEG 2000 is a wavelet-based compression standard and coding system. It'll come after the first JPEG standard within the future. Compared with Counterlet transform or Gabor filter, wavelet transform utilized in JPEG 2000 is a smaller amount effective to extract strong edge options. During this paper, a novel Discrete Wavelet Transform (DWT) based image hashing algorithm is planned. robust bits of hl, lh and HH sub-band in the same middle-frequency scale area unit extracted 1st. Then, they are fused to get the hash. Experimental results show that the projected algorithmic program is extremely robust to content preserving operations as well as having an excellent performance on tampering localization. additionally, since robust options area unit extracted within the same scale, the generation of hash is only required to decode JPEG 2000 image code stream partially Keywords-image hashing; DWT; JPEG 2000; tampering localization; authentication
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