Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PeCLR: Self-Supervised 3D Hand Pose Estimation from monocular RGB via
  Contrastive Learning   Encouraged by the success of contrastive learning on image classification
tasks, we propose a new self-supervised method for the structured regression
task of 3D hand pose estimation. Contrastive learning makes use of unlabeled
data for the purpose of representation learning via a loss formulation that
encourages the learned feature representations to be invariant under any image
transformation. For 3D hand pose estimation, it too is desirable to have
invariance to appearance transformation such as color jitter. However, the task
requires equivariance under affine transformations, such as rotation and
translation. To address this issue, we propose an equivariant contrastive
objective and demonstrate its effectiveness in the context of 3D hand pose
estimation. We experimentally investigate the impact of invariant and
equivariant contrastive objectives and show that learning equivariant features
leads to better representations for the task of 3D hand pose estimation.
Furthermore, we show that standard ResNets with sufficient depth, trained on
additional unlabeled data, attain improvements of up to 14.5% in PA-EPE on
FreiHAND and thus achieves state-of-the-art performance without any task
specific, specialized architectures. Code and models are available at
https://ait.ethz.ch/projects/2021/PeCLR/

4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph