Learning Pedestrian Group Representations for
Multi-modal Trajectory Prediction

Inhwan Bae · Jin-Hwi Park · Hae-Gon Jeon
ECCV 2022

Project Page ECCV Paper Source Code Related Works

This repository contains the code for unsupervised group estimation applied to the trajectory prediction models.

🧑‍🤝‍🧑 GP-Graph Architecture 🧑‍🤝‍🧑

• Learns to assign each pedestrian into the most likely behavior group in an unsupervised manner.
• Pedestrian group pooling&unpooling and group hierarchy graph for group behavior modeling.
• Group-level latent vector sampling strategy to share the latent vector between group members.

Model Training

Setup

Environment
All models were trained and tested on Ubuntu 20.04 with Python 3.7 and PyTorch 1.9.0 with CUDA 11.1.

Dataset
Preprocessed ETH and UCY datasets are included in this repository, under ./dataset/. The train/validation/test splits are the same as those fond in Social-GAN.

Baseline models
This repository supports the SGCN baseline trajectory predictor. We have included model source codes from their official GitHub in model_baseline.py

Train GP-Graph

To train our GPGraph-SGCN on the ETH and UCY datasets at once, we provide a bash script train.sh for a simplified execution.

./train.sh

We provide additional arguments for experiments:

./train.sh -t <experiment_tag> -d <space_seperated_dataset_string> -i <space_seperated_gpu_id_string>

# Examples
./train.sh -d "hotel" -i "1"
./train.sh -t onescene -d "hotel" -i "1"
./train.sh -t allinonegpu -d "eth hotel univ zara1 zara2" -i "0 0 0 0 0"

If you want to train the model with custom hyper-parameters, use train.py instead of the script file.

Model Evaluation

Pretrained Models

We have included pretrained models in the ./checkpoints/ folder.

Evaluate GP-Graph

You can use test.py to evaluate our GPGraph-SGCN model.

python test.py

📖 Citation

If you find this code useful for your research, please cite our trajectory prediction papers :)

💬 LMTrajectory (CVPR'24) 🗨️ | 1️⃣ SingularTrajectory (CVPR'24) 1️⃣ | 🌌 EigenTrajectory (ICCV'23) 🌌 | 🚩 Graph‑TERN (AAAI'23) 🚩 | 🧑‍🤝‍🧑 GP‑Graph (ECCV'22) 🧑‍🤝‍🧑 | 🎲 NPSN (CVPR'22) 🎲 | 🧶 DMRGCN (AAAI'21) 🧶

@inproceedings{bae2022gpgraph,
  title={Learning Pedestrian Group Representations for Multi-modal Trajectory Prediction},
  author={Bae, Inhwan and Park, Jin-Hwi and Jeon, Hae-Gon},
  booktitle={Proceedings of the European Conference on Computer Vision},
  year={2022}
}

Acknowledgement

Part of our code is borrowed from SGCN. We thank the authors for releasing their code and models.