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- W2369349581 abstract "As the existing block-wise lossless image authentication algorithms need to merge a larger image subregion to embed the watermark information and result in the degradation of the precision of locating distortions,a novel lossless image authentication algorithm with minimal expansion is proposed. In this algorithm,an image is splitted adaptively into some authentication blocks which are composed of a number of fine-grained basic blocks. A recursive trisection method and adjacent strategies are adopted to connect basic blocks in sequence into a link. When the watermark payload can' t be embedded into an authentication block,the algorithm tries to merge only one basic block from the basic block link into current authentication block. Theoretical analysis shows that the algorithm can adaptively adjust the size of each authentication block according to the image features to optimize the scale and adjacency of the authentication block. Experimental results showthat compared with other algorithms,the authentication block division in the algorithm is finer,and the authentication block size reduced by about 19. 2% in average,the algorithm significantly improves the tamper localization accuracy." @default.
- W2369349581 created "2016-06-24" @default.
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- W2369349581 date "2014-01-01" @default.
- W2369349581 modified "2023-09-23" @default.
- W2369349581 title "Lossless Image Authentication Algorithm with Minimal Expansion" @default.
- W2369349581 hasPublicationYear "2014" @default.
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