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首页> 外文会议>International Conference on P2P, Parallel, Grid, Cloud and Internet Computing >Lossless Image Authentication Algorithm Based on Three-Compa Image Basic Blocks
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Lossless Image Authentication Algorithm Based on Three-Compa Image Basic Blocks

机译：基于三比较图像基本块的无损图像认证算法

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摘要

As the existing block-wise loss less image authentication algorithms sacrifice the precision of locating distortions, a new loss less image authentication algorithm based on three-compa image basic blocks is proposed. The algorithm trisects the original image recursively in order to get basic blocks. When the watermark can't be embedded into the authentication block, the algorithm tries to merge only one basic block into current authentication block. As a result, each authentication block's size is expanded at a minimum level. Moreover, in order to prevent vector quantization attack, a digital signature algorithm is taken and signature is repeatedly embedded into the authentication block via a loss less watermarking algorithm. Theoretical analysis and experimental results demonstrate that the algorithm is more accurate than the algorithm based on adaptive combinations of image basic blocks.
机译：由于现有的逐块无损图像认证算法牺牲了定位失真的精度，提出了一种新的基于三梳图像基本块的无损图像认证算法。该算法以递归方式将原始图像三等分，以获取基本块。当水印无法嵌入到身份验证块中时，该算法将尝试仅将一个基本块合并到当前身份验证块中。结果，每个认证块的大小被扩展到最小级别。而且，为了防止矢量量化攻击，采用了数字签名算法，并且经由无损水印算法将签名重复地嵌入到认证块中。理论分析和实验结果表明，该算法比基于图像基本块自适应组合的算法更准确。

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