Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PhysFormer: Facial Video-based Physiological Measurement with Temporal
  Difference Transformer   Remote photoplethysmography (rPPG), which aims at measuring heart activities
and physiological signals from facial video without any contact, has great
potential in many applications (e.g., remote healthcare and affective
computing). Recent deep learning approaches focus on mining subtle rPPG clues
using convolutional neural networks with limited spatio-temporal receptive
fields, which neglect the long-range spatio-temporal perception and interaction
for rPPG modeling. In this paper, we propose the PhysFormer, an end-to-end
video transformer based architecture, to adaptively aggregate both local and
global spatio-temporal features for rPPG representation enhancement. As key
modules in PhysFormer, the temporal difference transformers first enhance the
quasi-periodic rPPG features with temporal difference guided global attention,
and then refine the local spatio-temporal representation against interference.
Furthermore, we also propose the label distribution learning and a curriculum
learning inspired dynamic constraint in frequency domain, which provide
elaborate supervisions for PhysFormer and alleviate overfitting. Comprehensive
experiments are performed on four benchmark datasets to show our superior
performance on both intra- and cross-dataset testings. One highlight is that,
unlike most transformer networks needed pretraining from large-scale datasets,
the proposed PhysFormer can be easily trained from scratch on rPPG datasets,
which makes it promising as a novel transformer baseline for the rPPG
community. The codes will be released at
https://github.com/ZitongYu/PhysFormer.

6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex