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from collections import OrderedDict
import torch
def normalize_activation(x, eps=1e-10):
norm_factor = torch.sqrt(torch.sum(x ** 2, dim=1, keepdim=True))
return x / (norm_factor + eps)
def get_state_dict(net_type: str = 'alex', version: str = '0.1'):
# build url
url = 'https://raw.githubusercontent.com/richzhang/PerceptualSimilarity/' \
+ f'master/lpips/weights/v{version}/{net_type}.pth'
# download
old_state_dict = torch.hub.load_state_dict_from_url(
url, progress=True,
map_location=None if torch.cuda.is_available() else torch.device('cpu')
)
# rename keys
new_state_dict = OrderedDict()
for key, val in old_state_dict.items():
new_key = key
new_key = new_key.replace('lin', '')
new_key = new_key.replace('model.', '')
new_state_dict[new_key] = val
return new_state_dict
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