This is an official PyTorch implementation of Temporal Diffusion Policy Optimization (TDPO) from our paper Confronting Reward Overoptimization for Diffusion Models: A Perspective of Inductive and Primacy Biases, which is accepted by ICML 2024.

Python 3.10 or a newer version is required. In order to install the requirements, create a conda environment and run the setup.py file in this repository, e.g. run the following commands:

conda create -p tdpo python=3.10.12 -y
conda activate tdpo

git clone [email protected]:ZiyiZhang27/tdpo.git
cd tdpo
pip install -e .

To train on Aesthetic Score and evaluate cross-reward generalization by out-of-domain reward functions, run this command:

accelerate launch scripts/train_tdpo.py --config config/config_tdpo.py:aesthetic

To train on PickScore and evaluate cross-reward generalization by out-of-domain reward functions, run this command:

accelerate launch scripts/train_tdpo.py --config config/config_tdpo.py:pickscore

To train on HPSv2 and evaluate cross-reward generalization by out-of-domain reward functions, run this command:

accelerate launch scripts/train_tdpo.py --config config/config_tdpo.py:hpsv2

For detailed explanations of all hyperparameters, please refer to the configuration files config/base_tdpo.py and config/config_tdpo.py. These files are pre-configured for training with 8 x NVIDIA A100 GPUs (each with 40GB of memory).

Note: Some hyperparameters might appear in both configuration files. In such cases, only the values set in config/config_tdpo.py will be used during training as this file has higher priority.

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

@inproceedings{zhang2024confronting,
  title={Confronting Reward Overoptimization for Diffusion Models: A Perspective of Inductive and Primacy Biases},
  author={Ziyi Zhang and Sen Zhang and Yibing Zhan and Yong Luo and Yonggang Wen and Dacheng Tao},
  booktitle={Forty-first International Conference on Machine Learning},
  year={2024}
}

• This repository is built upon the PyTorch codebase of DDPO developed by Kevin Black and his team. We are grateful for their contribution to the field.

• We also extend our thanks to Timo Klein for open-sourcing the PyTorch reimplementation of ReDo.

• We also acknowledge the contributions of PickScore, HPSv2, and ImageReward projects to this work.