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OCTET: Object-aware Counterfactual Explanations

Introduction

This is the official repository for the paper:

OCTET: Object-aware Counterfactual Explanations, Mehdi Zemni, Mickaël Chen, Éloi Zablocki, Hédi Ben-Younes, Patrick Pérez, Matthieu Cord. CVPR 2023.

OCTET is a counterfactual explanation method for deep visual classifiers.

The work was presented at CVPR 2023.

Installation and preparation

Clone this repo.

git clone https://github.com/valeoai/OCTET.git
cd OCTET/

This code requires PyTorch (1.8.1), python 3+, and cuda (11.1). Please install dependencies by

pip install -r requirements.txt

All checkpoints are provided in the release, please extract them. It should look like this:

OCTET/checkpoints/blobgan_256x512.ckpt
OCTET/checkpoints/decision_densenet.tar
OCTET/checkpoints/drivable
OCTET/checkpoints/encoder_256x512.pt

Usage

To use OCTET, you will need to instantiate a Config object with the desired parameters. The Config object should contain the following parameters:

• blobgan_weights: path to the weights file for the blobGan model
• encoder_weights: path to the weights file for the image encoder
• decision_model_weights: path to the weights file for the decision model to be explained
• device: torch device to use for computation
• output_dir: directory where generated images will be saved
• real_images: a boolean indicating whether real images should be used (True) or generated images should be used (False)
• dataset_path: path to the directory containing the images to use (if real_images is True)
• bs: batch size to use when loading images from the dataset
• num_imgs: number of images to generate (if real_images is False)

Once you have created a Config object, you can instantiate an OCTET object with octet = OCTET(config). You can then call the following methods on the OCTET object: octet.invert_and_cf() that will invert the image to get the latent code and generate the counterfactual explanation.

To run the script with default parameters (although you will need to change data path), simply run

python octet_invert_counterfactual.py

Acknowledgements

This code is based on the original STEEX code and BlobGAN code.

Citation

If the code helped you for your research, please consider citing

@inproceedings{zemni2023octet,
  title     = {OCTET: Object-aware Counterfactual Explanations},
  author    = {Mehdi Zemni and
               Micka{\"{e}}l Chen and
               {\'{E}}loi Zablocki and
               Hedi Ben{-}Younes and
               Patrick P{\'{e}}rez and
               Matthieu Cord},
  booktitle = {{IEEE} Conference on Computer Vision and Pattern Recognition, {CVPR}},
  year      = {2023}
}

Disclaimer

There might be some bugs or errors. Feel free to open an issue and/or contribute to improve the repo.