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In this paper, a novel reversible data hiding technique based on exploiting modification direction algorithm is proposed. First, binary secret messages are converted into a sequence of data in a 5-ary notational system. Then two equal gray images are used as cover objects. In accordance with Human Visual System, the secret messages are embedded into each pair of the integer wavelet coefficients of...
In this paper, a wavelet digital watermarking algorithm based on human visual system and watermarking capacity analysis was proposed. Firstly, watermark was scrambled through Arnold transform. Then, the frequency, texture and luminance masking factor of the improvement just noticed difference threshold model can be exploited to compute the watermark embedding intension in wavelet domain. And, with...
The knowledge representing method, question semantic analysis and answer extraction algorithm are very important parts of QA (question answering system). This paper puts forward a framework which can well serve not only the simple question, but also the complex conditional question; can construct and apply ontology to drive Chinese restricted domain QA; and can conveniently extract answer by QSR (question...
It is admitted that multi-platform cooperative engagement can enhance the whole operation power. The enhancement of operation power relies on information sharing among the platforms. In other words, the intention of information sharing is to achieve information superiority, then to transform the information superiority into decision superiority, and to win the operation in the end. This paper researches...
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