In the embedding processing, the updating of watermark shadows is periodic, so the scheme proposed can resist collusion attack. In the extract processing, the hashing function is used before watermark reconstruction to resist the cheating attack.
基于1个网页-相关网页
Intensive processing was required to parse data in the Presentation Services layer and extract the sub-set of data needed for a specific operation.
需要大量处理工作来解析presentation services层的数据，以及提取特定操作所需的数据子集。
Listing 3. Extract from the FOAF blog list processing code in bloginfo.py.
清单3 . bloginfo . py中实现从FOAF blog清单提取信息的代码。
The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain.
其关键思想是提取接收信号的频域成份，然后在频域中对信号进行处理。
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