Skip to content
No description, website, or topics provided.
Python
Branch: master
Clone or download

Latest commit

Latest commit f7a01e8 Dec 27, 2018

Files

Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
imgs add readme Jan 30, 2017
models Remove dots from module names to execute the code with pytorch 1.0.0. Dec 25, 2018
LICENSE.md add license Jan 30, 2017
README.md Update README.md Aug 24, 2017
generate.py Save each image in its own file. Dec 26, 2018
main.py Export generator configuration for future data generation. Dec 25, 2018
requirements.txt push code Jan 30, 2017

README.md

Wasserstein GAN

Code accompanying the paper "Wasserstein GAN"

A few notes

  • The first time running on the LSUN dataset it can take a long time (up to an hour) to create the dataloader. After the first run a small cache file will be created and the process should take a matter of seconds. The cache is a list of indices in the lmdb database (of LSUN)
  • The only addition to the code (that we forgot, and will add, on the paper) are the lines 163-166 of main.py. These lines act only on the first 25 generator iterations or very sporadically (once every 500 generator iterations). In such a case, they set the number of iterations on the critic to 100 instead of the default 5. This helps to start with the critic at optimum even in the first iterations. There shouldn't be a major difference in performance, but it can help, especially when visualizing learning curves (since otherwise you'd see the loss going up until the critic is properly trained). This is also why the first 25 iterations take significantly longer than the rest of the training as well.
  • If your learning curve suddenly takes a big drop take a look at this. It's a problem when the critic fails to be close to optimum, and hence its error stops being a good Wasserstein estimate. Known causes are high learning rates and momentum, and anything that helps the critic get back on track is likely to help with the issue.

Prerequisites

  • Computer with Linux or OSX
  • PyTorch
  • For training, an NVIDIA GPU is strongly recommended for speed. CPU is supported but training is very slow.

Two main empirical claims:

Generator sample quality correlates with discriminator loss

gensample

Improved model stability

stability

Reproducing LSUN experiments

With DCGAN:

python main.py --dataset lsun --dataroot [lsun-train-folder] --cuda

With MLP:

python main.py --mlp_G --ngf 512

Generated samples will be in the samples folder.

If you plot the value -Loss_D, then you can reproduce the curves from the paper. The curves from the paper (as mentioned in the paper) have a median filter applied to them:

med_filtered_loss = scipy.signal.medfilt(-Loss_D, dtype='float64'), 101)

More improved README in the works.

You can’t perform that action at this time.