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  4. XNect: Real-time Multi-Person 3D Motion Capture with a Single RGB Camera
 
research article

XNect: Real-time Multi-Person 3D Motion Capture with a Single RGB Camera

Mehta, Dushyant
•
Sotnychenko, Oleksandr
•
Mueller, Franziska
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July 1, 2020
Acm Transactions On Graphics (TOG)

We present a real-time approach for multi-person 3D motion capture at over 30 fps using a single RGB camera. It operates successfully in generic scenes which may contain occlusions by objects and by other people. Our method operates in subsequent stages. The first stage is a convolutional neural network (CNN) that estimates 2D and 3D pose features along with identity assignments for all visible joints of all individuals. We contribute a new architecture for this CNN, called SelecSLS Net, that uses novel selective long and short range skip connections to improve the information flow allowing for a drastically faster network without compromising accuracy. In the second stage, a fully-connected neural network turns the possibly partial (on account of occlusion) 2D pose and 3D pose features for each subject into a complete 3D pose estimate per individual. The third stage applies space-time skeletal model fitting to the predicted 2D and 3D pose per subject to further reconcile the 2D and 3D pose, and enforce temporal coherence. Our method returns the full skeletal pose in joint angles for each subject. This is a further key distinction from previous work that do not produce joint angle results of a coherent skeleton in real time for multi-person scenes. The proposed system runs on consumer hardware at a previously unseen speed of more than 30 fps given 512x320 images as input while achieving state-of-the-art accuracy, which we will demonstrate on a range of challenging real-world scenes.

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Type
research article
DOI
10.1145/3386569.3392410
Web of Science ID

WOS:000583700300055

Author(s)
Mehta, Dushyant
Sotnychenko, Oleksandr
Mueller, Franziska
Xu, Weipeng
Elgharib, Mohamed
Fua, Pascal  
Seidel, Hans-Peter
Rhodin, Helge  
Pons-Moll, Gerard
Theobalt, Christian
Date Issued

2020-07-01

Published in
Acm Transactions On Graphics (TOG)
Volume

39

Issue

4

Start page

82

Subjects

Computer Science, Software Engineering

•

Computer Science

•

human body pose

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motion capture

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real-time

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monocular

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rgb

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pose estimation

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shape

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CVLAB  
Available on Infoscience
December 13, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/174026
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