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Translate images to unseen domains in the test time with few example images.
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License CC BY-NC-SA 4.0 Python 3.7

FUNIT: Few-Shot Unsupervised Image-to-Image Translation

animal swap gif

Project page | Paper | FUNIT Explained | PetSwap Demo Video | Have fun with PetSwap

Few-shot Unsueprvised Image-to-Image Translation
Ming-Yu Liu, Xun Huang, Arun Mallya, Tero Karras, Timo Aila, Jaakko Lehtinen, and Jan Kautz.
In arXiv 2019.


Copyright (C) 2019 NVIDIA Corporation.

All rights reserved. Licensed under the CC BY-NC-SA 4.0 (Attribution-NonCommercial-ShareAlike 4.0 International)

The code is released for academic research use only. For commercial use, please contact


  • Clone this repo git clone
  • Install CUDA10.0+
  • Install cuDNN7.5
  • Install Anaconda3
  • Install required python pakcages
    • conda install -y pytorch torchvision cudatoolkit=10.0 -c pytorch
    • conda install -y -c anaconda pip
    • pip install pyyaml tensorboardX
    • conda install -y -c menpo opencv3

To reproduce the results reported in the paper, you would need an NVIDIA DGX1 machine with 8 V100 GPUs.

Hardware Requirement

To reproduce the experiment results reported in our ICCV paper, you would need to have an NVIDIA DGX1 machine with 8 V100 32GB GPUs. The training will use all 8 GPUS and take almost all of the GPU memory. It would take about 2 weeks to finish the training.

Dataset Preparation

Animal Face Dataset

We are releasing the Animal Face dataset. If you use this dataset in your publication, please cite the FUNIT paper.

cd dataset
tar xvf ILSVRC2012_img_train.tar
  • The training images should be in datasets/ILSVRC/Data/CLS-LOC/train. Now, extract the animal face images by running
python tools/ datasets/ILSVRC/Data/CLS-LOC/train --output_folder datasets/animals --coor_file datasets/animalface_coordinates.txt
  • The animal face images should be in datasets/animals. Note there are 149 folders. Each folder contains images of one animal kind. The number of images of the dataset is 117,484.
  • We use 119 animal kinds for training and the ramining 30 animal kinds for evaluation.


Once the animal face dataset is prepared, you can train an animal face translation model by running.

python --config configs/funit_animals.yaml --multigpus

The training results including the checkpoints and intermediate results will be stored in outputs/funit_animals.

For custom dataset, you would need to write an new configuration file. Please create one based on the example config file.

Testing pretrained model

To test the pretrained model, please first create a folder pretrained under the root folder. Then, we need to downlowad the pretrained models via the link and save it in pretrained. Untar the file tar xvf pretrained.tar.gz.

Now, we can test the translation

python --config configs/funit_animals.yaml --ckpt pretrained/ --input images/input_content.jpg --class_image_folder images/n02138411 --output images/output.jpg

The above command with translate the input image


input image

to an output meerkat image

output image

by using a set of 5 example meerkat images


If you use this code for your research, please cite our papers.

  title={Few-shot Unsueprvised Image-to-Image Translation},
  author={Ming-Yu Liu and Xun Huang and Arun Mallya and Tero Karras and Timo Aila and Jaakko Lehtinen and Jan Kautz.},
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