DiscoGAN in PyTorch

PyTorch implementation of Learning to Discover Cross-Domain Relations with Generative Adversarial Networks.

* All samples in README.md are genearted by neural network except the first image for each row.
* Network structure is slightly diffferent (here) from the author's code.

Requirements

• Python 2.7
• Pillow
• tqdm
• PyTorch
• torch-vision

Usage

First download datasets (from pix2pix) with:

$ bash ./data/download_dataset.sh dataset_name

• facades: 400 images from CMP Facades dataset.
• cityscapes: 2975 images from the Cityscapes training set.
• maps: 1096 training images scraped from Google Maps
• edges2shoes: 50k training images from UT Zappos50K dataset.
• edges2handbags: 137K Amazon Handbag images from iGAN project.

or you can use your own dataset by placing images like:

data
├── YOUR_DATASET_NAME
│   ├── A
│   |   ├── xxx.jpg (name doesn't matter)
│   |   ├── yyy.jpg
│   |   └── ...
│   └── B
│       ├── zzz.jpg
│       ├── www.jpg
│       └── ...
└── download_dataset.sh

All images in each dataset should have same size like using imagemagick:

# for Ubuntu
$ sudo apt-get install imagemagick
$ mogrify -resize 256x256! -quality 100 -path YOUR_DATASET_NAME/A/*.jpg
$ mogrify -resize 256x256! -quality 100 -path YOUR_DATASET_NAME/B/*.jpg

# for Mac
$ brew install imagemagick
$ mogrify -resize 256x256! -quality 100 -path YOUR_DATASET_NAME/A/*.jpg
$ mogrify -resize 256x256! -quality 100 -path YOUR_DATASET_NAME/B/*.jpg

# for scale and center crop
$ mogrify -resize 256x256^ -gravity center -crop 256x256+0+0 -quality 100 -path ../A/*.jpg

To train a model:

$ python main.py --dataset=edges2shoes --num_gpu=1
$ python main.py --dataset=YOUR_DATASET_NAME --num_gpu=4

To test a model (use your load_path):

$ python main.py --dataset=edges2handbags --load_path=logs/edges2handbags_2017-03-18_10-55-37 --num_gpu=0 --is_train=False

Results

1. Toy dataset

Result of samples from 2-dimensional Gaussian mixture models. IPython notebook

# iteration: 0:

# iteration: 10000:

2. Shoes2handbags dataset

# iteration: 11200:

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (shoe -> handbag -> shoe)

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (handbag -> shoe -> handbag)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) -> G_AB(G_BA(G_AB(x_A))) -> G_BA(G_AB(G_BA(G_AB(x_A)))) -> ...

3. Edges2shoes dataset

# iteration: 9600:

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (color -> sketch -> color)

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (sketch -> color -> sketch)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) -> G_AB(G_BA(G_AB(x_A))) -> G_BA(G_AB(G_BA(G_AB(x_A)))) -> ...

4. Edges2handbags dataset

# iteration: 9500:

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (color -> sketch -> color)

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (sketch -> color -> sketch)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) -> G_AB(G_BA(G_AB(x_A))) -> G_BA(G_AB(G_BA(G_AB(x_A)))) -> ...

5. Cityscapes dataset

# iteration: 8350:

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (image -> segmentation -> image)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (segmentation -> image -> segmentation)

6. Map dataset

# iteration: 22200:

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (image -> segmentation -> image)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (segmentation -> image -> segmentation)

7. Facades dataset

Generation and reconstruction on dense segmentation dataset looks weird which are not included in the paper.
I guess a naive choice of mean square error loss for reconstruction need some change on this dataset.

# iteration: 19450:

x_B -> G_BA(x_B) -> G_AB(G_BA(x_B)) (image -> segmentation -> image)

x_A -> G_AB(x_A) -> G_BA(G_AB(x_A)) (segmentation -> image -> segmentation)

Related works

• DCGAN-tensorflow
• BEGAN-tensorflow
• simulated-unsupervised-tensorflow

Author

Taehoon Kim / @carpedm20