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. 2019 Jul 26;19(15):3294. doi: 10.3390/s19153294

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Results of evaluating VLAD with different sizes of codebook: (a) recall and precision with different sizes of codebook, and (b) time consumption with different sizes of codebook.