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Style gan

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Style gan

  1. 1. Style GAN Zhedong Zheng University of Technology Sydney 2019-1-12
  2. 2. What? • Multiple levels of style • Propose a style-based GAN • New Evaluation Methods • Collect a larger and various dataset FFHQ
  3. 3. Unsupervised separation of high-level attributes Middle style Coarse style Fine style
  4. 4. Stochastic variation in the generated images
  5. 5. It demands … • Network architecture to control style • Style embedding Disentanglement (Separation)
  6. 6. What? • Multiple levels of style • Propose a style-based GAN • New Evaluation Methods • Collect a larger and various dataset FFHQ
  7. 7. Karras, Tero, Timo Aila, Samuli Laine, and Jaakko Lehtinen. “Progressive growing of gans for improved quality, stability, and variation.” ICLR 2018 How? =
  8. 8. What? • Multiple levels of style • Propose a style-based GAN • New Evaluation Methods • Collect a larger and various dataset FFHQ
  9. 9. FID on 2 Datasets BigGAN:
  10. 10. Mix regularization To be specific, we run two latent codes z1, z2 through the mapping network, and have the corresponding w1, w2 control the styles so that w1 applies before the crossover point and w2 after it.
  11. 11. Mix regularization
  12. 12. If feature is entangled… • FID evaluates the image quality. • Bad Interpolation (multiple variants) • Bad Classification
  13. 13. Perceptual path length (Smooth)
  14. 14. Linear separability on CelebA-HQ 1 2 3
  15. 15. What? • Multiple levels of style • Propose a style-based GAN • New Evaluation Methods • Collect a larger and various dataset FFHQ
  16. 16. Reference • Karras, Tero, Samuli Laine, and Timo Aila. "A Style-Based Generator Architecture for Generative Adversarial Networks." arXiv preprint arXiv:1812.04948 (2018). • Karras, Tero, Timo Aila, Samuli Laine, and Jaakko Lehtinen. “Progressive growing of gans for improved quality, stability, and variation.” ICLR 2018 • Brock, Andrew, Jeff Donahue, and Karen Simonyan. "Large scale gan training for high fidelity natural image synthesis." ICLR 2018.

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