Eta Inversion: Designing an Optimal Eta Function
for Diffusion-based Real Image Editing

Wonjun Kang^*, Kevin Galim^*, Hyung Il Koo

FuriosaAI

Paper Link: https://arxiv.org/abs/2403.09468

Updates

• [03/15/24] Code released.

Usage

• Note, we tested the code on a NVIDIA V100 32GB GPU. On different GPUs, results might slightly differ.

Setup

• Install PyTorch (tested with Python 3.9 and PyTorch 1.13.1), e.g.,

  conda create -n diffinv python=3.9
  conda activate diffinv
  conda install pytorch==1.13.1 torchvision==0.14.1 torchaudio==0.13.1 pytorch-cuda=11.7 -c pytorch -c nvidia

• Install requirements

  pip install -r requirements.txt

Demo

To run the provided Gradio demo run

python demo/run.py

and open http://localhost:7860/ in your browser.

Edit single image

To edit a single image, use edit_image.py.

python edit_image.py --help
usage: edit_image.py [-h] --input INPUT --source_prompt SOURCE_PROMPT --target_prompt TARGET_PROMPT [--output OUTPUT] [--inv_method INV_METHOD] [--edit_method EDIT_METHOD] [--edit_cfg EDIT_CFG] [--scheduler {ddim,ddpm,dpm}] [--steps STEPS] [--guidance_scale_bwd GUIDANCE_SCALE_BWD] [--guidance_scale_fwd GUIDANCE_SCALE_FWD]

Edits a single image.

optional arguments:
  -h, --help            show this help message and exit
  --input INPUT         Path to image to invert.
  --source_prompt SOURCE_PROMPT
                        Prompt to use for inversion.
  --target_prompt TARGET_PROMPT
                        Prompt to use for inversion.
  --output OUTPUT       Path for output image.
  --inv_method INV_METHOD
                        Available inversion methods:
                          diffinv                  Naiv DDIM inversion
                          nti                      Null text inversion
                          npi                      Negative prompt inversion
                          proxnpi                  Proximal negative prompt inversion
                          edict                    EDICT inversion
                          ddpminv                  DDPM inversion
                          dirinv                   Direct inversion
                          etainv                   Eta inversion
  --edit_method EDIT_METHOD
                        Available editing methods:
                          simple                   Simple denoising of inverted latent with target prompt
                          ptp                      Prompt-to-prompt
                          masactrl                 MasaControl
                          pnp                      Plug-and-play
                          pix2pix_zero             Pix2Pix zero
  --edit_cfg EDIT_CFG   Path to yaml file for editor configuration. Often needed for prompt-to-prompt.
  --scheduler {ddim,ddpm,dpm}
                        Which scheduler to use.
  --steps STEPS         How many diffusion steps to use.
  --guidance_scale_bwd GUIDANCE_SCALE_BWD
                        Classifier free guidance scale to use for backward diffusion (denoising).
  --guidance_scale_fwd GUIDANCE_SCALE_FWD
                        Classifier free guidance scale to use for forward diffusion (inversion).
  --prec {fp16,fp32}    Precision for diffusion.

E.g., for prompt-to-prompt editing using Eta Inversion of test/data/house.png with prompt "a house->monster in the woods", run

python edit_image.py \
  --inv_method etainv \
  --edit_method ptp \
  --input test/data/house.png \
  --source_prompt "a house in the woods" \
  --target_prompt "a monster in the woods" \
  --output out.png

Input	Output

Prepare datasets (for evaluation)

• PIE: Download from here and extract to data/eval/PIE-Bench_v1
• Plug-and-Play
  • Download from here and extract to data/eval/plug_and_play
  • Run

    python scripts/convert_plug_and_play_imagenetr-ti2i.py
    python scripts/convert_plug_and_play_imagenetr-fake-ti2i.py

• ImagenHub: No setup needed

Evaluate

For evaluation prepare the dataset(s) above you want to test and create a config .yaml file inside cfg/eval with the datasets, inversion methods and editing methods you want to evaluate. For a reference config file see cfg/eval/demo.yaml. The evaluating script will run each combination given under data, edit_method and method. E.g., for the config file cfg/eval/demo.yaml, evaluation will run for (diffinv, ptp), (npi, ptp) and (etainv, ptp). After preparing the config .yaml file use

python eval.py --help
usage: eval.py [-h] --cfg CFG [CFG ...] [--device DEVICE [DEVICE ...]] [--no_proc]

Run evaluation for the given config file. The result will be stored under result/{cfg_file_name}. For each combination of dataset, inversion and editing method in the config file, a separate directory will be created in result/{cfg_file_name}

optional arguments:
  -h, --help            show this help message and exit
  --cfg CFG [CFG ...]   Config file(s) for evaluation.
  --device DEVICE [DEVICE ...]
                        Which cuda devices to use. Can be multiple (multiprocessing).
  --no_proc             Disables multiprocessing.

to perform editing and save all images under result/{cfg_file_name}. E.g., if you want to use cfg/eval/demo.yaml with one GPU, run

python eval.py --cfg cfg/eval/demo.yaml

All images will be stored under result/demo.

Afterwards you can compute metrics on the output images using

python compute_metrics.py --help
usage: compute_metrics.py [-h] [--cfg CFG [CFG ...]] [--metric METRIC [METRIC ...]]

optional arguments:
  -h, --help            show this help message and exit
  --cfg CFG [CFG ...]   Config file(s) for evaluation.
  --metric METRIC [METRIC ...]
                        Metric(s) to compute. If not specified, all metrics are computed.

The metrics will be stored as .yaml file in a folder named metrics under each experiment directory. E.g., to compute metrics for cfg/eval/demo.yaml run

python compute_metrics.py --cfg cfg/eval/demo.yaml

Finally you can visualize the computed metrics with notebooks/visualize_results.ipynb. Please see the notebook for further details.

Citation

@article{kang2024eta,
  title={Eta Inversion: Designing an Optimal Eta Function for Diffusion-based Real Image Editing},
  author={Kang, Wonjun and Galim, Kevin and Koo, Hyung Il},
  journal={arXiv preprint arXiv:2403.09468},
  year={2024}
}