Nobuaki Matozaki

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In the TRECVID Instance Search (INS) task, it is known that use of BM25, which is an improvement of the TFIDF,greatly improves retrieval performance. Its calculation, however, requires tremendous amount of computational cost and this fact makes its use intractable. In this paper, we present its efficient computational method. Since the BM25 is obtained by(More)
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