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- W2155435905 abstract "Media authentication and tampering localization are important in content delivery via untrusted intermediaries, such as peer-to-peer (P2P) file sharing. Many differently encoded versions of a media file might exist. Our previous work applied distributed source coding to authenticate the legitimate diversity of encoded images and also localize the tampered regions in an inauthentic image. The authentication/localization decoder was supplied with a Slepian-Wolf encoded image projection as authentication data. We extend our scheme to localize tampering in contrast and brightness adjusted images using an expectation maximization algorithm at the decoder. Experimental results demonstrate that tampered image blocks can be identified with high probability using data of only a few hundred bytes for a 512 times 512 image." @default.
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- W2155435905 date "2008-10-01" @default.
- W2155435905 modified "2023-09-27" @default.
- W2155435905 title "Localization of tampering in contrast and brightness adjusted images using distributed source coding and expectation maximization" @default.
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- W2155435905 doi "https://doi.org/10.1109/icip.2008.4712227" @default.
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