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License CC BY-NC-SA 4.0 Python 2.7

UNIT: UNsupervised Image-to-image Translation Networks

New implementation available at imaginaire repository

We have a reimplementation of the UNIT method that is more performant. It is avaiable at Imaginaire


Copyright (C) 2018 NVIDIA Corporation. All rights reserved. Licensed under the CC BY-NC-SA 4.0 license (

Code usage

  • Please check out our tutorial.

  • For multimodal (or many-to-many) image translation, please check out our new work on MUNIT.

What's new.

  • 05-02-2018: We now adapt MUNIT code structure. For reproducing experiment results in the NIPS paper, please check out version_02 branch.

  • 12-21-2017: Release pre-trained synthia-to-cityscape image translation model. See for usage examples.

  • 12-14-2017: Added multi-scale discriminators described in the pix2pixHD paper. To use it simply make the name of the discriminator COCOMsDis.


Ming-Yu Liu, Thomas Breuel, Jan Kautz, "Unsupervised Image-to-Image Translation Networks" NIPS 2017 Spotlight, arXiv:1703.00848 2017

Two Minute Paper Summary

(We thank the Two Minute Papers channel for summarizing our work.)

The Shared Latent Space Assumption

Result Videos

More image results are available in the Google Photo Album.

Left: input. Right: neural network generated. Resolution: 640x480

Left: input. Right: neural network generated. Resolution: 640x480

Street Scene Image Translation

From the first row to the fourth row, we show example results on day to night, sunny to rainy, summery to snowy, and real to synthetic image translation (two directions).

For each image pair, left is the input image; right is the machine generated image.

Dog Breed Image Translation

Cat Species Image Translation

Attribute-based Face Image Translation