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GANs Can Play Lottery Tickets Too

Code for this paper GANs Can Play Lottery Tickets Too.

Overview

For a range of GANs, we can find matching subnetworks at 67%-74% sparsity. We observe that with or without pruning discriminator has a minor effect on the existence and quality of matching subnetworks, while the initialization used in the discriminator plays a significant role.

Experiment Results

Iterative pruning results on SNGAN

Requirements

pytorch==1.4.0 tensorflow-gpu=1.15.0 imageio scikit-image tqdm tensorboardx

Command

SNGAN

Generate Initial Weights

mkdir initial_weights
python generate_initial_weights.py --model sngan_cifar10

Prepare FID statistics

Download FID statistics files from here to fid_stat.

Baseline

python train.py --model sngan_cifar10 --exp_name sngan_cifar10 --init-path initial_weights

Baseline models are also available here.

Iterative Magnitude Pruning on Generator (IMPG)

python train_impg.py --model sngan_cifar10 --exp_name sngan_cifar10 --init-path initial_weights --load-path <path/to/log> 

Iterative Magnitude Pruning on Generator (IMPGD)

python train_impgd.py --model sngan_cifar10 --exp_name sngan_cifar10 --init-path initial_weights 

Iterative Magnitude Pruning on Generator (IMPGDKD)

python train_impgd.py --model sngan_cifar10 --exp_name sngan_cifar10 --init-path initial_weights --use-kd-d

CycleGAN

Generate initial weights

mkdir initial_weights
python generate_initial_weights.py

Download Data

./download_dataset DATASET_NAME

Baseline

python train.py --dataset DATASET_NAME --rand initial_weights --gpu GPU 

IMPG

python train_impg.py --dataset DATASET_NAME --rand initial_weights --gpu GPU --pretrain PRETRAIN

IMPGD

python train_impg.py --dataset DATASET_NAME --rand initial_weights --gpu GPU --pretrain PRETRAIN

Acknowledgement

Inception Score code from OpenAI's Improved GAN (official), and the FID code and CIFAR-10 statistics file from https://github.com/bioinf-jku/TTUR (official).