JoJoGAN / e4e /criteria /w_norm.py
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import torch
from torch import nn
class WNormLoss(nn.Module):
def __init__(self, start_from_latent_avg=True):
super(WNormLoss, self).__init__()
self.start_from_latent_avg = start_from_latent_avg
def forward(self, latent, latent_avg=None):
if self.start_from_latent_avg:
latent = latent - latent_avg
return torch.sum(latent.norm(2, dim=(1, 2))) / latent.shape[0]