You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
1.8 KiB
57 lines
1.8 KiB
""" Norm Layer Factory
|
|
|
|
Create norm modules by string (to mirror create_act and creat_norm-act fns)
|
|
|
|
Copyright 2022 Ross Wightman
|
|
"""
|
|
import types
|
|
import functools
|
|
|
|
import torch.nn as nn
|
|
|
|
from .norm import GroupNorm, GroupNorm1, LayerNorm, LayerNorm2d
|
|
|
|
_NORM_MAP = dict(
|
|
batchnorm=nn.BatchNorm2d,
|
|
batchnorm2d=nn.BatchNorm2d,
|
|
batchnorm1d=nn.BatchNorm1d,
|
|
groupnorm=GroupNorm,
|
|
groupnorm1=GroupNorm1,
|
|
layernorm=LayerNorm,
|
|
layernorm2d=LayerNorm2d,
|
|
)
|
|
_NORM_TYPES = {m for n, m in _NORM_MAP.items()}
|
|
|
|
|
|
def create_norm_layer(layer_name, num_features, act_layer=None, apply_act=True, **kwargs):
|
|
layer = get_norm_layer(layer_name, act_layer=act_layer)
|
|
layer_instance = layer(num_features, apply_act=apply_act, **kwargs)
|
|
return layer_instance
|
|
|
|
|
|
def get_norm_layer(norm_layer):
|
|
assert isinstance(norm_layer, (type, str, types.FunctionType, functools.partial))
|
|
norm_kwargs = {}
|
|
|
|
# unbind partial fn, so args can be rebound later
|
|
if isinstance(norm_layer, functools.partial):
|
|
norm_kwargs.update(norm_layer.keywords)
|
|
norm_layer = norm_layer.func
|
|
|
|
if isinstance(norm_layer, str):
|
|
layer_name = norm_layer.replace('_', '')
|
|
norm_layer = _NORM_MAP.get(layer_name, None)
|
|
elif norm_layer in _NORM_TYPES:
|
|
norm_layer = norm_layer
|
|
elif isinstance(norm_layer, types.FunctionType):
|
|
# if function type, assume it is a lambda/fn that creates a norm layer
|
|
norm_layer = norm_layer
|
|
else:
|
|
type_name = norm_layer.__name__.lower().replace('_', '')
|
|
norm_layer = _NORM_MAP.get(type_name, None)
|
|
assert norm_layer is not None, f"No equivalent norm layer for {type_name}"
|
|
|
|
if norm_kwargs:
|
|
norm_layer = functools.partial(norm_layer, **norm_kwargs) # bind/rebind args
|
|
return norm_layer
|