GAN steerability

Project Page | Paper

On the "steerability" of generative adversarial networks.
Ali Jahanian*, Lucy Chai*, Phillip Isola

Prerequisites

• Linux
• Python 3
• CPU or NVIDIA GPU + CUDA CuDNN

Setup

• Clone this repo:

git clone https://github.com/ali-design/gan_steerability.git

• Install dependencies:
  • we provide a Conda environment.yml file listing the dependencies. You can create a Conda environment with the dependencies using:

conda env create -f environment.yml

• Download resources:
  • we provide a script for downloading associated resources (e.g. stylegan). Fetch these by running:

bash  resources/download_resources.sh

Training walks

• The current implementation covers these variants:
  • models: biggan, stylegan
  • transforms: color, colorlab, shiftx, shifty, zoom, rotate2d, rotate3d
  • walk_type: linear, NNz
  • losses: l2, lpips
• Some examples of commands for training walks:

# train a biggan NN walk for shiftx with lpips loss
python train.py --model biggan --transform shiftx --num_samples 20000 --learning_rate 0.0001 \
	--walk_type NNz --loss lpips --gpu 0 --eps 25 --num_steps 5

# train a stylegan linear walk with l2 loss using the w latent space
python train.py --model stylegan --transform color --num_samples 2000 --learning_rate 0.0001 \
	--walk_type linear --loss l2 --gpu 0 --latent w --model_save_freq 100

• Alternatively you can train using a config yml file, for example:

python train.py --config_file config/biggan_color_linear.yml

• Each training run will save a config file called opt.yml in the same directory as the weights, which can be used for rerunning experiments with the same settings. You may need to use the flag --overwrite_config for overwriting existing weights and config files.

• Run python train.py -h to list available training options

Visualize walks

• Run python vis_image.py -h to list available visualization options. The key things to provide are a model checkpoint and a config yml file. For example:

python vis_image.py \
	models/biggan_zoom_linear_lr0.0001_l2/model_20000_final.ckpt \
	models/biggan_zoom_linear_lr0.0001_l2/opt.yml \
	--gpu 0 --num_samples 50 --noise_seed 20 --truncation 0.5 --category 207

python vis_image.py \
        models/stylegan_color_linear_lr0.0001_l2_cats_w/model_2000_final.ckpt \
        models/stylegan_color_linear_lr0.0001_l2_cats_w/opt.yml \
        --gpu 1 --num_samples 10 --noise_seed 20 

• By default this will save generated images to <output_dir>/images specified in the config yml, unless overwritten with the --output_dir option

Notebooks

• We provide some examples of jupyter notebooks illustrating the full training pipeline. See notebooks.
• It might be easiest to start here if you want to try your own transformations! The key things to modify are get_target_np and to scale alpha appropriately when feeding to graph.
• If using the provided conda environment, you'll need to add it to the jupyter kernel:

source activate gan_steerability
python -m ipykernel install --user --name gan_steerability

Visualizing Distributions

These will be coming soon!

Citation

If you use this code for your research, please cite our paper:

@article{gansteerability,
  title={On the "steerability" of generative adversarial networks},
  author={Jahanian, Ali and Chai, Lucy and Isola, Phillip},
  journal={arXiv preprint arXiv:1907.07171},
  year={2019}
}