Progressive Growing of GANs for Improved Quality, Stability, and Variation

Submission video of our paper, published at ICLR 2018. Please see the final version at Authors: Tero Karras (NVIDIA) Timo Aila (NVIDIA) Samuli Laine (NVIDIA) Jaakko Lehtinen (NVIDIA and Aalto University) For business inquiries, please contact researchinquiries@ For press and other inquiries, please contact Hector Marinez at hmarinez@ Links: Abstract: We describe a new training methodology for generative adversarial networks. The key idea is to grow both the generator and discriminator progressively: starting from a low resolution, we add new layers that model increasingly fine details as training progresses. This both speeds the training up and greatly stabilizes it, allowing us to produce images of unprecedented quality, e.g., CelebA images at 1024². We also propose a simple way to increase the variation in generated images, and achieve a record inception score of in unsupervised CIFAR10. Additionally, we describe several implementation details that are important for discouraging unhealthy competition between the generator and discriminator. Finally, we suggest a new metric for evaluating GAN results, both in terms of image quality and variation. As an additional contribution, we construct a higher-quality version of the CelebA dataset.