latent-transformer-1: A Python repository from Xu-Yao

A Latent Transformer for Disentangled Face Editing in Images and Videos

Official implementation for paper: A Latent Transformer for Disentangled Face Editing in Images and Videos.

Requirements

Dependencies

Python 3.6
PyTorch 1.8
Opencv
Tensorboard_logger

You can install a new environment for this repo by running

conda env create -f environment.yml
conda activate lattrans

Prepare StyleGAN2 encoder and generator

We use the pretrained StyleGAN2 encoder and generator released from paper Encoding in Style: a StyleGAN Encoder for Image-to-Image Translation. Download and save the official implementation to pixel2style2pixel/ directory. Download and save the pretrained model to pixel2style2pixel/pretrained_models/.

In order to save the latent codes to the designed path, we slightly modify pixel2style2pixel/scripts/inference.py.

# modify run_on_batch()
if opts.latent_mask is None:
    result_batch = net(inputs, randomize_noise=False, resize=opts.resize_outputs, return_latents=True)
    
# modify run()
tic = time.time()
result_batch, latent_batch = run_on_batch(input_cuda, net, opts) 
latent_save_path = os.path.join(test_opts.exp_dir, 'latent_code_%05d.npy'%global_i)
np.save(latent_save_path, latent_batch.cpu().numpy())
toc = time.time()

Training

Prepare the training data

To train the latent transformers, you can download our prepared dataset to the directory data/ and the pretrained latent classifier to the directory models/.
```
sh download.sh
```
You can also prepare your own training data. To achieve that, you need to map your dataset to latent codes using the StyleGAN2 encoder. The corresponding label file is also required. You can continue to use our pretrained latent classifier. If you want to train your own latent classifier on new labels, you can use pretraining/latent_classifier.py.
Training

You can modify the training options of the config file in the directory configs/.
```
python train.py --config 001 
```

Testing

Single Attribute Manipulation

Make sure that the latent classifier is downloaded to the directory models/ and the StyleGAN2 encoder is prepared as required. After training your latent transformers, you can use test.py to run the latent transformer for the images in the test directory data/test/. We also provide several pretrained models here (run download.sh to download them). The output images will be saved in the folder outputs/. You can change the desired attribute with --attr.

python test.py --config 001 --attr Eyeglasses --out_path ./outputs/

If you want to test the model on your custom images, you need to first encoder the images to the latent space of StyleGAN using the pretrained encoder.

cd pixel2style2pixel/
python scripts/inference.py \
--checkpoint_path=pretrained_models/psp_ffhq_encode.pt \
--data_path=../data/test/ \
--exp_dir=../data/test/ \
--test_batch_size=1

Sequential Attribute Manipulation

You can reproduce the sequential editing results in the paper using notebooks/figure_sequential_edit.ipynb and the results in the supplementary material using notebooks/figure_supplementary.ipynb.

We also provide an interactive visualization notebooks/visu_manipulation.ipynb, where the user can choose the desired attributes for manipulation and define the magnitude of edit for each attribute.

Video Manipulation

We provide a script to achieve attribute manipulation for the videos in the test directory data/video/. Please ensure that the StyleGAN2 encoder is prepared as required. You can upload your own video and modify the options in run_video_manip.sh. You can view our video editing results presented in the paper.

sh run_video_manip.sh

Citation

@article{yao2021latent,
  title={A Latent Transformer for Disentangled Face Editing in Images and Videos},
  author={Yao, Xu and Newson, Alasdair and Gousseau, Yann and Hellier, Pierre},
  journal={2021 International Conference on Computer Vision},
  year={2021}
}

License

This source code is made available under the license found in the LICENSE.txt in the root directory of this source tree.

Xu-Yao/latent-transformer-1