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A novel image encryption technique is proposed associated with the generalized Hilbert transform in this paper. Two schemes of this technique are presented in generating real encrypted image and recovering the original image. The encrypted image is real-valued without data expanding, which can benefit the digital processing of images by electronic computers where speed of computation is important...
Term extraction from Web reviews should obviously be benefitted from the large volume of reviews on products or services. This paper addresses the opinion heuristics including opinion patterns and opinion collocations. The opinion target network is proposed in this paper to model the opinion patterns in a two-layer direct graph. Meanwhile, the unified collocation framework is presented to model the...
In this paper, we present an algorithm for segmenting moving objects from videos based on lifting wavelet transform. We firstly segment a video into scenes. Then several iteration of 1D lifting wavelet transforms are performed on each scene on time axis. Because wavelets have the ability of telling apart different frequency, we can extract the sections with high frequency, which represent the moving...
Typically Web pages always contain a large amount of banner ads, navigation bars, and copyright notices etc. Such irrelevant information is not part of the main contents of the pages, they will seriously harm Web mining and searching. In this paper, we develop and evaluate a method that utilizes both the visual features and the semantic information to extract informative blocks. We first partition...
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