Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The 2018 DAVIS Challenge on Video Object Segmentation   We present the 2018 DAVIS Challenge on Video Object Segmentation, a public
competition specifically designed for the task of video object segmentation. It
builds upon the DAVIS 2017 dataset, which was presented in the previous edition
of the DAVIS Challenge, and added 100 videos with multiple objects per sequence
to the original DAVIS 2016 dataset. Motivated by the analysis of the results of
the 2017 edition, the main track of the competition will be the same than in
the previous edition (segmentation given the full mask of the objects in the
first frame -- semi-supervised scenario). This edition, however, also adds an
interactive segmentation teaser track, where the participants will interact
with a web service simulating the input of a human that provides scribbles to
iteratively improve the result.

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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph