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Representation Learning with (Latent) Diffusion Models

This repository contains the code for the Master thesis "Representation Learning with Diffusion Models".

arXiv | BibTeX

Requirements

Checkout environment.yaml for suitable package versions or directly create and activate a conda environment via

conda env create -f environment.yaml
conda activate diffusion
conda install pytorch==1.10.1 torchvision==0.11.2 torchaudio==0.10.1 cudatoolkit=11.3 -c pytorch -c conda-forge

Pretrained Models

For now, only the checkpoints for those LDMs, LRDMs, t-LRDMs trained on LSUN-Churches are available for download.

You can download all checkpoints via https://k00.fr/representationDM. The corresponding configuration files should be stored in the same directory as the model checkpoint. Note that the models trained in a reduced latent space also require the corresponding first_stage model.

Evaluation Scripts

Various evaluation scripts are provided in the scripts directory. For full configurability, please checkout the available CLI arguments.

Unconditional Sampling

Unconditional samples can be generated by running

CUDA_VISIBLE_DEVICES=<GPU_ID> python scripts/sampling.py -r <path-to-model-checkpoint>
# Create sampling progression via
CUDA_VISIBLE_DEVICES=<GPU_ID> python scripts/sampling.py -r <path-to-model-checkpoint> -n 2 -progr

Reconstructions & Interpolations

Reconstructions of input images from the encoded representations can be generated by running

CUDA_VISIBLE_DEVICES=<GPU_ID> python scripts/repr_reconstructions.py -r <path-to-model-checkpoint> --n_inputs=4 --n_reconstructions=4

In order to interpolate in representation space, run

CUDA_VISIBLE_DEVICES=<GPU_ID> python scripts/repr_interpolations.py -r <path-to-model-checkpoint> -n 2

Style-Shape Separating LRDM

🚧 WIP

Train your own Models

Data preparation

For downloading and preparing the LSUN-Churches dataset, proceed as described in the latent-diffusion repository.

Model Training

Logs and checkpoints for trained models are saved to logs/<START_DATE_AND_TIME>_<config-name>.

Various training configuration files are available in configs/. Models can be trained by running

CUDA_VISIBLE_DEVICES=<GPU_ID> python main.py --base configs/<path-to-config>.yaml -t --gpus 0, -n <name>

where <name> is a custom name of the corresponding log-directory (optional).

Comments

• The implementation is based on https://github.com/openai/guided-diffusion and https://github.com/yang-song/score_sde_pytorch.

BibTex

@misc{https://doi.org/10.48550/arxiv.2210.11058,
    doi = {10.48550/ARXIV.2210.11058},
    url = {https://arxiv.org/abs/2210.11058},
    author = {Traub, Jeremias},
    keywords = {Computer Vision and Pattern Recognition (cs.CV), FOS: Computer and information sciences, FOS: Computer and information sciences},
    title = {Representation Learning with Diffusion Models},
    publisher = {arXiv},
    year = {2022},
    copyright = {arXiv.org perpetual, non-exclusive license}
}