Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mimetics: Towards Understanding Human Actions Out of Context   Recent methods for video action recognition have reached outstanding
performances on existing benchmarks. However, they tend to leverage context
such as scenes or objects instead of focusing on understanding the human action
itself. For instance, a tennis field leads to the prediction playing tennis
irrespectively of the actions performed in the video. In contrast, humans have
a more complete understanding of actions and can recognize them without
context. The best example of out-of-context actions are mimes, that people can
typically recognize despite missing relevant objects and scenes. In this paper,
we propose to benchmark action recognition methods in such absence of context
and introduce a novel dataset, Mimetics, consisting of mimed actions for a
subset of 50 classes from the Kinetics benchmark. Our experiments show that (a)
state-of-the-art 3D convolutional neural networks obtain disappointing results
on such videos, highlighting the lack of true understanding of the human
actions and (b) models leveraging body language via human pose are less prone
to context biases. In particular, we show that applying a shallow neural
network with a single temporal convolution over body pose features transferred
to the action recognition problem performs surprisingly well compared to 3D
action recognition methods.

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The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat