Abstract
The performances of an ad-hoc video search (AVS) task can only be improved when the video processing for analyzing video contents and the linguistic processing for interpreting natural language queries are nicely combined. Among the several issues associated with this challenging task, this paper particularly focuses on the sense disambiguation/filtering (WSD/WSF) of the terms contained in a search query. We propose WSD/WSF methods which employ distributed sense representations, and discuss their efficacy in improving the performance of an AVS system which makes full use of a large bank of visual concept classifiers. The application of a WSD/WSF method is crucial, as each visual concept classifier is linked with the lexical concept denoted by a word sense. The results are generally promising, outperforming not only a baseline query processing method that only considers the polysemy of a query term but also a strong WSD baseline method.
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Notes
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A WordNet synset denotes a lexical concept. It is defined by a set of synonymous word senses. A word, more precisely a word form, generally has multiple senses and each sense denotes a unique synset.
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Refer to [9] for the list of employed classifiers.
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We employed the MS COCO dataset available at http://cocodataset.org.
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- 6.
The official evaluation metrics adopted by TRECVID AVS is a variant of usual mAP.
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As the number of queries in the TRECVID AVS task is as small as 30, the WSD accuracies by the presented methods are quite unstable. We could not observe any statistical significance. However the DistSim method slightly outperformed two other methods in precision: 0.892 (DistSim) to 0.890 (MFS) and 0.888 (SimSum).
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Acknowledgment
The present work was partially supported by JSPS KAKENHI Grants numbers 15K00249, 17H01831, and 18K11362, and the Kayamori Foundation of Informational Science Advancement.
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Hirakawa, K., Kikuchi, K., Ueki, K., Kobayashi, T., Hayashi, Y. (2018). Ad-hoc Video Search Improved by the Word Sense Filtering of Query Terms. In: Tseng, YH., et al. Information Retrieval Technology. AIRS 2018. Lecture Notes in Computer Science(), vol 11292. Springer, Cham. https://doi.org/10.1007/978-3-030-03520-4_15
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