High-pass Block Replacement attack of watermarking
- Release time:2024-08-09
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Affiliation of Author(s):
信息与控制工程学院
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Journal:
China Communications
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Key Words:
中文关键字：数字水印；攻击；小波，英文关键字：Watermarking； Block Replacement Attack；Wavelet；Fuz
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Abstract:
Abstract: To improve the watermark benchmarks database, a new BRA (Block Replacement Attack) method is introduced in this work. Unlike the typical BRA exploited the self-similarity among blocks in image, the scheme utilized the self-similarity in various scale and orientation bands in the wavelet domain of the image. They search the replacement blocks from the blocks of the smaller sub-image at the next lower resolution. The most important advantage of this scheme is that the pyramid sub-band decomposition acts as an automatic block classifier, with the result of simplifying the block search and block matching procedures thus making the block replacement more effective. Further more, an improved algorithm based on Fuzzy set theory is introduced in which the number of blocks chosen for combination are modified adaptively to obtain the candidate replacement blocks. It simplified the procedure for searching the candidate replacement blocks. These advantages are confirmed by the experimental results, which show that the performance of the schemes is superior to typical BRA methods.
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Note:
王慧琴
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First Author:
wanghuiqin
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Indexed by:
Journal paper
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Volume:
卷：Vol. 11
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Issue:
期：No.6
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Page Number:
页：pp159-163
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Translation or Not:
no
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Date of Publication:
2011-06-01
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