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25 lines
514 B
Python
25 lines
514 B
Python
import torch
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class UnitWeighting:
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def __call__(self, sigma):
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return torch.ones_like(sigma, device=sigma.device)
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class EDMWeighting:
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def __init__(self, sigma_data=0.5):
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self.sigma_data = sigma_data
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def __call__(self, sigma):
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return (sigma**2 + self.sigma_data**2) / (sigma * self.sigma_data) ** 2
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class VWeighting(EDMWeighting):
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def __init__(self):
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super().__init__(sigma_data=1.0)
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class EpsWeighting:
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def __call__(self, sigma):
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return sigma**-2
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