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Self-Supervised Generative Adversarial Networks (arxiv.org)
1 point by pplonski86 on Nov 29, 2018 | hide | past | pdf | discuss on HN

In plain words: The generator and discriminator still compete to make images, but the discriminator also learns to spot how far an image has been rotated, building useful features without labels. This label-free setup matched labeled image generators and scored 23.4 on an image-quality test for ImageNet.

Abstract · Self-Supervised GANs via Auxiliary Rotation Loss

Conditional GANs are at the forefront of natural image synthesis. The main drawback of such models is the necessity for labeled data. In this work we exploit two popular unsupervised learning techniques, adversarial training and self-supervision, and take a step towards bridging the gap between conditional and unconditional GANs. In particular, we allow the networks to collaborate on the task of representation learning, while being adversarial with respect to the classic GAN game. The role of self-supervision is to encourage the discriminator to learn meaningful feature representations which are not forgotten during training. We test empirically both the quality of the learned image representations, and the quality of the synthesized images. Under the same conditions, the self-supervised GAN attains a similar performance to state-of-the-art conditional counterparts. Finally, we show that this approach to fully unsupervised learning can be scaled to attain an FID of 23.4 on unconditional ImageNet generation.

Ting Chen, Xiaohua Zhai, Marvin Ritter, Mario Lucic, Neil Houlsby
arXiv:1811.11212 · cs.LG, cs.CV, stat.ML · submitted Nov 27, 2018 · updated Apr 9, 2019
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