SCA 2020: Showcases

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/2632938
The 19th annual Symposium on Computer Animation 2020 - Symposium Proceedings
Online Symposium, October 6 – 9, 2020
Showcase Chair: Daniel Holden

(for CGF Papers see SCA 2020 - Full Papers
for Posters see SCA 2020 - Posters)
Showcases
ZooBuilder: 2D and 3D Pose Estimation for Quadrupeds Using Synthetic Data
[full paper Image] [meta data Image]
Abassin Sourou Fangbemi, Yi Fei Lu, Maoyuan Xu, Xiaowu Luo, Alexis Rolland, and Chedy Raissi
Contact and Human Dynamics from Monocular Video
[full paper Image] [meta data Image]
Davis Rempe, Leonidas J. Guibas, Aaron Hertzmann, Bryan Russell, Ruben Villegas, and Jimei Yang
WeightShift: Accelerating Animation at Framestore with Physics
[full paper Image] [meta data Image]
Danny Chapman, Tim Daoust, Andras Ormos, and Joseph Lewis
Negative Jacobian Free Simulations Using Principal Stretches
[full paper Image] [meta data Image]
Mihail Francu
Fast Eulerian Fluid Simulation In Games Using Poisson Filters
[full paper Image] [meta data Image]
Amir H. Rabbani and Soufiane Khiat

BibTeX (SCA 2020: Showcases)
@inproceedings{
10.2312:sca.20201217,

booktitle = {
Eurographics/ ACM SIGGRAPH Symposium on Computer Animation - Showcases},

editor = {
Holden, Daniel
},
title = {{
ZooBuilder: 2D and 3D Pose Estimation for Quadrupeds Using Synthetic Data}},

author = {
Fangbemi, Abassin Sourou
 and 
Lu, Yi Fei
 and 
Xu, Maoyuan
 and 
Luo, Xiaowu
 and 
Rolland, Alexis
 and 
Raissi, Chedy
},
year = {
2020},

publisher = {
The Eurographics Association},


ISSN = {1727-5288},
ISBN = {978-3-03868-129-8},

DOI = {
10.2312/sca.20201217}

}
@inproceedings{
10.2312:sca.20201218,

booktitle = {
Eurographics/ ACM SIGGRAPH Symposium on Computer Animation - Showcases},

editor = {
Holden, Daniel
},
title = {{
Contact and Human Dynamics from Monocular Video}},

author = {
Rempe, Davis
 and 
Guibas, Leonidas J.
 and 
Hertzmann, Aaron
 and 
Russell, Bryan
 and 
Villegas, Ruben
 and 
Yang, Jimei
},
year = {
2020},

publisher = {
The Eurographics Association},


ISSN = {1727-5288},
ISBN = {978-3-03868-129-8},

DOI = {
10.2312/sca.20201218}

}
@inproceedings{
10.2312:sca.20201219,

booktitle = {
Eurographics/ ACM SIGGRAPH Symposium on Computer Animation - Showcases},

editor = {
Holden, Daniel
},
title = {{
WeightShift: Accelerating Animation at Framestore with Physics}},

author = {
Chapman, Danny
 and 
Daoust, Tim
 and 
Ormos, Andras
 and 
Lewis, Joseph
},
year = {
2020},

publisher = {
The Eurographics Association},


ISSN = {1727-5288},
ISBN = {978-3-03868-129-8},

DOI = {
10.2312/sca.20201219}

}
@inproceedings{
10.2312:sca.20201220,

booktitle = {
Eurographics/ ACM SIGGRAPH Symposium on Computer Animation - Showcases},

editor = {
Holden, Daniel
},
title = {{
Negative Jacobian Free Simulations Using Principal Stretches}},

author = {
Francu, Mihail
},
year = {
2020},

publisher = {
The Eurographics Association},


ISSN = {1727-5288},
ISBN = {978-3-03868-129-8},

DOI = {
10.2312/sca.20201220}

}
@inproceedings{
10.2312:sca.20201221,

booktitle = {
Eurographics/ ACM SIGGRAPH Symposium on Computer Animation - Showcases},

editor = {
Holden, Daniel
},
title = {{
Fast Eulerian Fluid Simulation In Games Using Poisson Filters}},

author = {
Rabbani, Amir H.
 and 
Khiat, Soufiane
},
year = {
2020},

publisher = {
The Eurographics Association},


ISSN = {1727-5288},
ISBN = {978-3-03868-129-8},

DOI = {
10.2312/sca.20201221}

}

Browse

Recent Submissions

Now showing 1 - 5 of 5
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    Item
    ZooBuilder: 2D and 3D Pose Estimation for Quadrupeds Using Synthetic Data
    (The Eurographics Association, 2020) Fangbemi, Abassin Sourou; Lu, Yi Fei; Xu, Maoyuan; Luo, Xiaowu; Rolland, Alexis; Raissi, Chedy; Holden, Daniel
    This work introduces a novel strategy for generating synthetic training data for 2D and 3D pose estimation of animals using keyframe animations. With the objective to automate the process of creating animations for wildlife, we train several 2D and 3D pose estimation models with synthetic data, and put in place an end-to-end pipeline called ZooBuilder. The pipeline takes as input a video of an animal in the wild, and generates the corresponding 2D and 3D coordinates for each joint of the animal's skeleton. With this approach, we produce motion capture data that can be used to create animations for wildlife.
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    Item
    Contact and Human Dynamics from Monocular Video
    (The Eurographics Association, 2020) Rempe, Davis; Guibas, Leonidas J.; Hertzmann, Aaron; Russell, Bryan; Villegas, Ruben; Yang, Jimei; Holden, Daniel
    Existing methods for human motion from video predict 2D and 3D poses that are approximately accurate, but contain visible errors that violate physical constraints, such as feet penetrating the ground and bodies leaning at extreme angles. We present a physics-based method for inferring 3D human motion from video sequences that takes initial 2D and 3D pose estimates as input. We first estimate ground contact timings with a neural network which is trained without hand-labeled data. A physicsbased trajectory optimization then solves for a physically-plausible motion, based on the inputs. We show this process produces motions that are more realistic than those from purely kinematic methods for character animation from dynamic videos. A detailed report that fully describes our method is available at geometry.stanford.edu/projects/human-dynamics-eccv-2020.
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    Item
    WeightShift: Accelerating Animation at Framestore with Physics
    (The Eurographics Association, 2020) Chapman, Danny; Daoust, Tim; Ormos, Andras; Lewis, Joseph; Holden, Daniel
    Framestore and WeightShift created a full-body physics simulation to deliver art-directed shots in highly dynamic scenarios in several days instead of several weeks. Our technique combines ragdoll simulation and keyframe animation in a new control scheme that is integrated in a standard Maya rig to produce a hybrid simulation workflow. The new workflow was used in over 50 completed shots, and is in production on numerous current projects. In this session we share our experience with full-body simulation, and discuss the numerous advantages and challenges of the technique.
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    Item
    Negative Jacobian Free Simulations Using Principal Stretches
    (The Eurographics Association, 2020) Francu, Mihail; Holden, Daniel
    Finite element (FE) simulations are prone to encountering negative Jacobians during the solving process. If nothing is done, the simulation can be brought to a halt, result in inverted elements or have undetermined behavior. We propose a solution that uses principal stretches as slack variables in a constrained minimization formulation and enforce them to always be positive. We show that our approach can never hit inverted configurations, thus being suitable for applications where inversion cannot be tolerated. We implement the method in 2D and show that it outperforms standard FE methods in stressful scenarios.
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    Fast Eulerian Fluid Simulation In Games Using Poisson Filters
    (The Eurographics Association, 2020) Rabbani, Amir H.; Khiat, Soufiane; Holden, Daniel
    We present separable Poisson filters to accelerate the projection step in Eulerian fluid simulation. These filters are analytically computed offline and are easy to integrate into any fluid algorithm with a Poisson pressure computation step. We take advantage of the recursive structure of the Jacobi method to construct and then reduce a kernel that is used to solve the Poisson pressure entirely on GPU. Our method demonstrates promising speedups that scale well with both the grid resolution and the target Jacobi iteration.