Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Player Tracking and Identification in Ice Hockey   Tracking and identifying players is a fundamental step in computer
vision-based ice hockey analytics. The data generated by tracking is used in
many other downstream tasks, such as game event detection and game strategy
analysis. Player tracking and identification is a challenging problem since the
motion of players in hockey is fast-paced and non-linear when compared to
pedestrians. There is also significant camera panning and zooming in hockey
broadcast video. Identifying players in ice hockey is challenging since the
players of the same team look almost identical, with the jersey number the only
discriminating factor between players. In this paper, an automated system to
track and identify players in broadcast NHL hockey videos is introduced. The
system is composed of three components (1) Player tracking, (2) Team
identification and (3) Player identification. Due to the absence of publicly
available datasets, the datasets used to train the three components are
annotated manually. Player tracking is performed with the help of a state of
the art tracking algorithm obtaining a Multi-Object Tracking Accuracy (MOTA)
score of 94.5%. For team identification, the away-team jerseys are grouped into
a single class and home-team jerseys are grouped in classes according to their
jersey color. A convolutional neural network is then trained on the team
identification dataset. The team identification network gets an accuracy of 97%
on the test set. A novel player identification model is introduced that
utilizes a temporal one-dimensional convolutional network to identify players
from player bounding box sequences. The player identification model further
takes advantage of the available NHL game roster data to obtain a player
identification accuracy of 83%.

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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin