专利名称：Robust hidden data extraction method for
全面风险管理
scaling attacks
发明人：Koduvayur P. Subbalakshmi,Palak K. Amin
梦到数钱申请号：US11200866
申请日：20050810
公开号：US20060176299A1cad周长
公开日：
招人烦
秋收起义总指挥20060810
专利内容由知识产权出版社提供
郑丽媛专利附图：
摘要：A product and process for extracting hidden data from a stego-image that has been subjected to scaling attacks are disclod. The hidden data extraction method of the prent invention retains the one-to-one mapping of the stego-image blocks to the
corresponding blocks in the scaled image. When the stego-image is scaled down, the block size for extracting the hidden data is reduced proportionally. When the stego-image is scaled up, the block size for extracting the hidden data is incread proportionally. The total overall number of blocks of pixels to be examined is kept constant between the scaled image and the stego-image. The hidden data extraction method can be combined with any existing block-DCT bad data hiding method to provide an overall method for dealing with scaling attacks. Both the extraction method and the combined method can be implemented in software and stored within a machine-readable medium.
申请人：Koduvayur P. Subbalakshmi,Palak K. Amin巴西龟冬天怎么养
地址：Holmdel NJ US,Edison NJ US
国籍：US,US
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