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- W2387789232 abstract "A novel authentication algorithm is proposed to improve the watermark embedding capacity and security for JPEG(joint picture experts group) image.The discrete cosine transform(DCT) coefficient is adjusted via the modification of standard quantization table to improve the capacity.Then the coefficient is combined with the position information to obtain the combined value.And the watermark is generated with the combined values as the initial state of chaotic system,then the watermark is embedded into the corresponding DCT coefficients.Furthermore,the watermarked JPEG image is produced by entropy encoding.Theoretical analysis and simulation results show that the proposed algorithm can effectively tradeoff the conflict of embedding capacity and image quality and locate tampered blocks accurately.Besides,it is more secure." @default.
- W2387789232 created "2016-06-24" @default.
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- W2387789232 date "2007-01-01" @default.
- W2387789232 modified "2023-09-26" @default.
- W2387789232 title "JPEG image authentication scheme based on value combination technique and chaotic maps" @default.
- W2387789232 hasPublicationYear "2007" @default.
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