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PyTorch Torchvision UnNormalize (reverse Normalize)
import torchvision
class UnNormalize(torchvision.transforms.Normalize):
def __init__(self,mean,std,*args,**kwargs):
new_mean = [-m/s for m,s in zip(mean,std)]
new_std = [1/s for s in std]
super().__init__(new_mean, new_std, *args, **kwargs)
# imagenet_norm = dict(mean=[0.485, 0.456, 0.406],std=[0.229, 0.224, 0.225])
# UnNormalize(**imagenet_norm)
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