Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Background-Click Supervision for Temporal Action Localization   Weakly supervised temporal action localization aims at learning the
instance-level action pattern from the video-level labels, where a significant
challenge is action-context confusion. To overcome this challenge, one recent
work builds an action-click supervision framework. It requires similar
annotation costs but can steadily improve the localization performance when
compared to the conventional weakly supervised methods. In this paper, by
revealing that the performance bottleneck of the existing approaches mainly
comes from the background errors, we find that a stronger action localizer can
be trained with labels on the background video frames rather than those on the
action frames. To this end, we convert the action-click supervision to the
background-click supervision and develop a novel method, called BackTAL.
Specifically, BackTAL implements two-fold modeling on the background video
frames, i.e. the position modeling and the feature modeling. In position
modeling, we not only conduct supervised learning on the annotated video frames
but also design a score separation module to enlarge the score differences
between the potential action frames and backgrounds. In feature modeling, we
propose an affinity module to measure frame-specific similarities among
neighboring frames and dynamically attend to informative neighbors when
calculating temporal convolution. Extensive experiments on three benchmarks are
conducted, which demonstrate the high performance of the established BackTAL
and the rationality of the proposed background-click supervision. Code is
available at https://github.com/VividLe/BackTAL.

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The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex