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. 2019 Jun 13;20:323. doi: 10.1186/s12859-019-2931-1

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© The Author(s) 2019

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Examples of annotations, from left to right, for classification, localization, detection, semantic segmentation, and instance segmentation. Images obtained from the Oxford-IIIT Pet Dataset [17] which are available under a Creative Commons Attribution-ShareAlike 4.0 International License