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Physion: Evaluating Physical Prediction from Vision in Humans and Machines [paper]

Daniel M. Bear, Elias Wang, Damian Mrowca, Felix J. Binder, Hsiao-Yu Fish Tung, R.T. Pramod, Cameron Holdaway, Sirui Tao, Kevin Smith, Fan-Yun Sun, Li Fei-Fei, Nancy Kanwisher, Joshua B. Tenenbaum, Daniel L.K. Yamins, Judith E. Fan

This is the official implementation of particle-based models (GNS and DPI-Net) on the Physion dataset. The code is built based on the original implementation of DPI-Net (https://github.com/YunzhuLi/DPI-Net).

Contact: sfish0101@gmail.com (Fish Tung)

Papers of GNS and DPI-Net:

** Learning to Simulate Complex Physics with Graph Networks ** [paper]

Alvaro Sanchez-Gonzalez, Jonathan Godwin, Tobias Pfaff, Rex Ying, Jure Leskovec, Peter W. Battaglia

** Learning Particle Dynamics for Manipulating Rigid Bodies, Deformable Objects, and Fluids ** [website] [paper]

Yunzhu Li, Jiajun Wu, Russ Tedrake, Joshua B. Tenenbaum, Antonio Torralba **

Demo

Rollout from our learned model (left is ground truth, right is prediction)

Dominoes Roll Contain Drape

Installation

Clone this repo:

git clone https://github.com/htung0101/DPI-Net-p.git
cd DPI-Net-p
git submodule update --init --recursive

Install Dependencies if using Conda

For Conda users, we provide an installation script:

bash ./scripts/conda_deps.sh
pip install pyyaml

To use tensorboard for training visualization

pip install tensorboardX
pip install tensorboard

Install binvox

We use binvox to transform object mesh into particles. To use binvox, please download binvox from https://www.patrickmin.com/binvox/, put it under ./bin, and include it in your path with

export PATH=$PATH:$PWD/bin.

You might need to do chmod 777 binvox in order to execute the file.

Setup your own data path

open paths.yaml and write your own path there. You can set up different paths for different machines under different user name.

Preprocessing the Physion dataset

1) We need to convert the mesh scenes into particle scenes. This line will generate a separate folder (dpi_data_dir specified in paths.yaml) that holds data for the particle-based models

bash run_preprocessing_tdw_cheap.sh [SCENARIO_NAME] [MODE]

e.g., bash run_preprocessing_tdw_cheap.sh Dominoes train SCENARIO_NAME can be one of the following: Dominoes, Collide, Support, Link, Contain, Roll, Drop, or Drape. MODE can be either train or test

You can visualize the original videos and the generated particle scenes with

python preprocessing_tdw_cheap.py --scenario Dominones --mode "train" --visualization 1

There will be videos generated under the folder vispy.

2) Then, try generate a train.txt and valid.txt files that indicates the trials you want to use for training and validaiton.

python create_train_valid.py

You can also design your specific split. Just put the trial names into one txt file.

3) For evalution on the red-hits-yellow prediciton, we can get the binary red-hits-yellow label txt file from the test dataset with

bash run_get_label_txt.sh [SCENARIO_NAME] test

This will generate a folder called labels under your output_folder dpi_data_dir. In the folder, each scenario will have a corresponding label file called [SCENARIO_NAME].txt

Training

Ok, now we are ready to start training the models.You can use the following command to train from scratch.

• Train GNS

    bash scripts/train_gns.sh [SCENARIO_NAME] [GPU_ID]

SCENARIO_NAME can be one of the following: Dominoes, Collide, Support, Link, Contain, Roll, Drop and Drape.

• Train DPI

    bash scripts/train_dpi.sh [SCENARIO_NAME] [GPU_ID]

Our implementation is different from the original DPI paper in 2 ways: (1) our model takes as inputs relative positions as opposed to absolute positions, (2) our model is trained with injected noise. These two features are suggested in the GNS paper, and we found them to be critcial for the models to generalize well to unseen scenes.

• Train with multiple scenarios

You can also train with more than one scenarios by adding different scenario to the argument dataf

 python train.py  --env TDWdominoes --model_name GNS --log_per_iter 1000 --training_fpt 3 --ckp_per_iter 5000 --floor_cheat 1  --dataf "Dominoes, Collide, Support, Link, Roll, Drop, Contain, Drape" --outf "all_gns"

• Visualize your training progress

Models and model logs are saved under [out_dir]/dump/dump_TDWdominoes. You can visualize the training progress using tensorboard

tensorboard --logdir MODEL_NAME/log

Evaluation

• Evaluate GNS

bash scripts/eval_gns.sh [TRAIN_SCENARIO_NAME] [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]

You can get the prediction txt file under eval/eval_TDWdominoes/[MODEL_NAME], e.g., test-Drape.txt, which contains results of testing the model on the Drape scenario. You can visualize the results with additional argument --vis 1.

• Evaluate GNS-Ransac

bash scripts/eval_gns_ransac.sh [TRAIN_SCENARIO_NAME] [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]

• Evaluate DPI

bash scripts/eval_dpi.sh [TRAIN_SCENARIO_NAME] [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]

• Evaluate Models trained on multiple scenario Here we provide some example of evaluating on arbitray models trained on all scenarios.

bash eval_all_gns.sh [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]
bash eval_all_dpi.sh [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]
bash eval_all_gns_ransac.sh [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]

• Visualize trained Models Here we provide an example of visualizing the rollout results from trained arbitray models.

bash vis_gns.sh [EPOCH] [ITER] [Test SCENARIO_NAME] [GPU_ID]

You can find the visualization under eval/eval_TDWdominoes/[MODEL_NAME]/test-[Scenario]. We should see a gif for the original RGB videos, and another gif for the side-by-side comparison of gt particle scenes and the predicted particle scenes.

Citing Physion

If you find this codebase useful in your research, please consider citing:

@inproceedings{bear2021physion,
    Title={Physion: Evaluating Physical Prediction from Vision in Humans and Machines},
    author= {Daniel M. Bear and
           Elias Wang and
           Damian Mrowca and
           Felix J. Binder and
           Hsiao{-}Yu Fish Tung and
           R. T. Pramod and
           Cameron Holdaway and
           Sirui Tao and
           Kevin A. Smith and
           Fan{-}Yun Sun and
           Li Fei{-}Fei and
           Nancy Kanwisher and
           Joshua B. Tenenbaum and
           Daniel L. K. Yamins and
           Judith E. Fan},
    url = {https://arxiv.org/abs/2106.08261},
    archivePrefix = {arXiv},
    eprint = {2106.08261},
    Year = {2021}
}