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In this paper, we study the problem of large scale image retrieval by developing a new class of bag-of-features to encode geometric information of objects within an image. Beyond existing orderless bag-of-features, local features of an image are first projected to different directions or points to generate a series of ordered bag-of-features, based on which different families of spatial bag-of-features...
Fuzzy classification ranks items by degree rather than assigning them either within or without of a category. The novelty of our work is in integrating fuzzy classification algorithms with an interface to visualize fuzzy results. An advantage of our algorithms' `fuzziness' is that it provides additional information per retrieved result that helps in deciding whether to drill down to the document or...
Based on the MSS datum in 1975 and Landsite TM datum in 1987, 1995, 2000 and 2005, monitored the land use change in the Reservoir Area of three Gorges was conducted with the support of several indexes to reflect the temporal-spatial changes during 30 years. The results as following, (1) The areas of cultivated land, forestry land, grass land decreased but the areas of construction land and water area...
Desktop searching engines are used frequently in our modern operating system, but their techniques cannot be used in small mobile devices because of the limited memory, limited processing speed and the characteristics of flash. In this paper, we proposed an adaptive inverted index that can be used in small mobile devices based on the memory constraint and storage characteristics according to the size...
The development of a spatio-temporal access method suitable for objects moving on fixed networks is a very attractive challenge due to a large number of applications dealing with this type of objects. In this paper, we propose a novel indexing technique named PPFI which consists of a 2D R*-tree, a forest of 1D R*-tree, and a hash structure. PPFI not only supports queries related to the past positions...
Reprinting information among websites produces a great deal redundant WebPages. To improve search efficiency and user satisfaction, an algorithm to Detect near-Duplicate WebPages (DDW) is proposed. In the course of developing a near-duplicate detection system for a multi-billion page repository, we make two research contributions. First, we consider both syntactic and semantic information to present...
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