Trajectory prediction has been widely pursued in many fields, and many model-based and model-free methods have been explored. The former include rule-based, geometric or optimization-based models, and the latter are mainly comprised of deep learning approaches. In this paper, we propose a new method combining both methodologies based on a new Neural Differential Equation model. Our new model (Neural Social Physics or NSP) is a deep neural network within which we use an explicit physics model with learnable parameters. The explicit physics model serves as a strong inductive bias in modeling pedestrian behaviors, while the rest of the network provides a strong data-fitting capability in terms of system parameter estimation and dynamics stochasticity modeling. We compare NSP with 15 recent deep learning methods on 6 datasets and improve the state-of-the-art performance by 5.56%-70%. Besides, we show that NSP has better generalizability in predicting plausible trajectories in drastically different scenarios where the density is 2-5 times as high as the testing data. Finally, we show that the physics model in NSP can provide plausible explanations for pedestrian behaviors, as opposed to black-box deep learning.
Below is the key environment under which the code was developed, not necessarily the minimal requirements:
1 Python 3.8.8
2 pytorch 1.9.1
3 Cuda 11.1
And other libraries such as numpy.
Raw data: SDD (https://cvgl.stanford.edu/projects/uav_data/) and ETH/UCY (https://data.vision.ee.ethz.ch/cvl/aess/dataset/)
Algorithms in data/SDD_ini can be used to process raw data into training data and testing data. The training/testing split is same as Y-net.
We employ a progressive training scheme. Run train_goals.py, train_nsp_wo.py and train_nsp_w.nsp to train Goals-Network, Collision-Network with k_env and CVAE respectively. The outputs are saved in saved_models. There are trained models in saved_models for test.
For example
python train_goals.py
Jiangbei Yue, Dinesh Manocha and He Wang
Jiangbei Yue scjy@leeds.ac.uk
He Wang, he_wang@@ucl.ac.uk, Personal Site
Project Webpage: http://drhewang.com/pages/NSP.html
If you have any questions, please feel free to contact me: Jiangbei Yue (scjy@leeds.ac.uk)
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 899739 CrowdDNA.
Please cite our paper if you find it useful:
@InProceedings{Jiang_trajectory_2022,
author={J. {Yue} and D. {Manocha} and H. {Wang}},
booktitle={Proceedings of the European Conference on Computer Vision (ECCV)},
title={Human Trajectory Prediction via Neural Social Physics},
year={2022}}
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