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yang-song / score_sde_pytorch

PyTorch implementation for Score-Based Generative Modeling through Stochastic Differential Equations (ICLR 2021, Oral)
https://arxiv.org/abs/2011.13456
Apache License 2.0
1.58k stars 295 forks source link

ODE sampling get unrealistic images #28

Open yuanzhi-zhu opened 1 year ago

yuanzhi-zhu commented 1 year ago

Thanks for your great work which inspires so many!!

As mentioned in #13, I also noticed that the pure ODE sampling results is not satisfying for 256*256 images (maybe also bigger size).

Most of the time these generated images are blurry or over-smooth, sometimes even very noisy.

To reproduce, one can simply run the demo notebook with pretrained checkpoints provided by the authors.

yuanzhi-zhu commented 1 year ago

I suspect the reason is ODE solver accumulates more error for larger image (data size)