Quite recently, a few hundreds of semantic concepts are detected automatically with varied performance and subsequently, a new video retrieval paradigm of query-by-concept emerges. In this paper, we consider the probl...
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Quite recently, a few hundreds of semantic concepts are detected automatically with varied performance and subsequently, a new video retrieval paradigm of query-by-concept emerges. In this paper, we consider the problem of exploiting the potential of learned semantics concepts, together with the combination of traditional methods, for automatic and interactive retrieval. We argue that it is important, in both automatic and interactive retrieval scenarios, to find a few relevant concepts to search with, given a multimedia query. For automatic retrieval, we show that both text and image inputs are useful for solving this query-concept-mapping (QUCOM) problem. For interactive retrieval, searching with relevant concepts plus conventional feedback methods is quite effective and is robust to initial search results. Experimental evidence on the search task of TRECVID 2006 shows that by solving QUCOM with a large lexicon of 311 semantic concept detectors, the automatic retrieval performance increases 20% and the interactive retrieval performance has the potential to outperform the state-of-the-art systems.
This paper introduces a new class of switching vector median filter. The proposed algorithm first uses four directional masks to analyze the color difference between the central pixel and its neighborhood pixels in th...
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ISBN:
(纸本)9780819469502
This paper introduces a new class of switching vector median filter. The proposed algorithm first uses four directional masks to analyze the color difference between the central pixel and its neighborhood pixels in the RGB color space and classify each color pixel into noisy pixel or noise-free one, and then employs the standard vector median filtering operations in the detected noisy locations to restore the corrupted pixels and leave the noise-free ones unchanged. The simulation results show that the proposed method excellently suppresses impulsive noise as well as preserving the image details well, and significantly outperforms the existing vector filtering solutions in terms of both the objective measures and the perceptual visual quality.
Applying modern information management technology to traditional environment field is the sign of making environment protection work modern and the necessitous task that environment protection departments are confront...
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A major unsolved problem in human-like agent is the construction and application of realistic human facial expression models. Human-like agents should interact with human by recognizing human facial expression and syn...
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In many cases, the topology of communcation systems can be abstracted and represented as graph. Graph theories and algorithms are useful in these situations. In this paper, we introduced an algorithm to enumerate all ...
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In the paper, the existing colony algorithm is improved for the routing computation of satellite networks with rapidly-changed network topology. A virtual topology strategy with new grouping is first proposed to deal ...
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ISBN:
(纸本)7302139229
In the paper, the existing colony algorithm is improved for the routing computation of satellite networks with rapidly-changed network topology. A virtual topology strategy with new grouping is first proposed to deal with the problem of the rapidly-changed network topology, and then the improved ant colony algorithm is applied in routing optimization of satellite networks. Finally, the good performance of the improved algorithm is illustrated by simulations.
The concern about national security has increased significantly since the 9/11 attacks. However, information overload and lack of advanced, automated techniques hinders the effective analysis of criminal and terrorist...
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Reading news is one of the most popular activities when people surf the internet. As too many news sources provide independent news information und each has its own preference, detecting unbiased important news might ...
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