def init_weights(self):
for conv in self.convs:
kaiming_init(conv)
for fc in self.fcs:
kaiming_init(fc,
a=1,
mode='fan_in',
nonlinearity='leaky_relu',
distribution='uniform')
normal_init(self.fc_mask_iou, std=0.01)
def init_weights(self):
"""Initiate the parameters either from existing checkpoint or from
scratch."""
# Override the init_weights of i3d
super().init_weights()
for module_name in self.lateral_connections:
layer = getattr(self, module_name)
for m in layer.modules():
if isinstance(m, (nn.Conv3d, nn.Conv2d)):
kaiming_init(m)
def init_weights(self):
for m in self.modules():
if hasattr(m, 'kaiming_init') and m.kaiming_init:
kaiming_init(
m,
mode='fan_in',
nonlinearity='leaky_relu',
bias=0,
distribution='uniform',
a=1)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self, pretrained=None):
super(VGG, self).init_weights(pretrained)
if pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, _BatchNorm):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
def init_weights(self):
"""Initialize model weights."""
for m in self.predict_layers.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
def init_weights(self):
if isinstance(self.pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, self.pretrained, strict=False, logger=logger)
elif self.pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv3d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm3d):
constant_init(m, 1)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (nn.BatchNorm2d, nn.GroupNorm)):
constant_init(m, 1)
def __init__(self,
depth,
num_stages=4,
strides=(1, 2, 2, 2),
dilations=(1, 1, 1, 1),
out_indices=(0, 1, 2, 3),
style='pytorch',
frozen_stages=-1,
norm_cfg=dict(type='BN', requires_grad=True), # diff with YY: normalize=dict(type='BN', frozen=False)
norm_eval=True,
dcn=None,
stage_with_dcn=(False, False, False, False),
with_cp=False,
zero_init_residual=True):
super(MulCatResnet, self).__init__()
# ResNet used for processing RGB images
self.resnet_rgb = ResNet(
depth=depth,
num_stages=num_stages,
strides=strides,
dilations=dilations,
out_indices=out_indices,
style=style,
frozen_stages=frozen_stages,
norm_cfg=norm_cfg,
norm_eval=norm_eval,
dcn=dcn,
stage_with_dcn=stage_with_dcn,
with_cp=with_cp,
zero_init_residual=zero_init_residual
)
# ResNet used for processing thermal images(thermal images should be expanded to three channels)
self.resnet_thermal = ResNet(
depth=depth,
num_stages=num_stages,
strides=strides,
dilations=dilations,
out_indices=out_indices,
style=style,
frozen_stages=frozen_stages,
norm_cfg=norm_cfg,
norm_eval=norm_eval,
dcn=dcn,
stage_with_dcn=stage_with_dcn,
with_cp=with_cp,
zero_init_residual=zero_init_residual
)
for i in out_indices:
conv_name = "conv{}".format(i)
self.add_module(conv_name, nn.Conv2d(int(512 * 2 ** i), int(256 * 2 ** i), 1))
kaiming_init(getattr(self, conv_name))
# relu_name = "relu{}".format(i)
# self.add_module(nn.ReLU)
self.out_indices = out_indices
def init_weights(self):
if isinstance(self.pretrained, str):
logger = get_root_logger()
checkpoint = _load_checkpoint(self.pretrained,
logger=logger,
map_location='cpu')
if 'state_dict' in checkpoint:
state_dict = checkpoint['state_dict']
elif 'model' in checkpoint:
state_dict = checkpoint['model']
else:
state_dict = checkpoint
if self.pretrain_style == 'timm':
# Because the refactor of vit is blocked by mmcls,
# so we firstly use timm pretrain weights to train
# downstream model.
state_dict = vit_convert(state_dict)
if 'pos_embed' in state_dict.keys():
if self.pos_embed.shape != state_dict['pos_embed'].shape:
logger.info(msg=f'Resize the pos_embed shape from '
f'{state_dict["pos_embed"].shape} to '
f'{self.pos_embed.shape}')
h, w = self.img_size
pos_size = int(
math.sqrt(state_dict['pos_embed'].shape[1] - 1))
state_dict['pos_embed'] = self.resize_pos_embed(
state_dict['pos_embed'],
(h // self.patch_size, w // self.patch_size),
(pos_size, pos_size), self.interpolate_mode)
self.load_state_dict(state_dict, False)
elif self.pretrained is None:
super(VisionTransformer, self).init_weights()
# We only implement the 'jax_impl' initialization implemented at
# https://github.com/rwightman/pytorch-image-models/blob/master/timm/models/vision_transformer.py#L353 # noqa: E501
trunc_normal_init(self.pos_embed, std=.02)
trunc_normal_init(self.cls_token, std=.02)
for n, m in self.named_modules():
if isinstance(m, nn.Linear):
trunc_normal_init(m.weight, std=.02)
if m.bias is not None:
if 'ffn' in n:
normal_init(m.bias, std=1e-6)
else:
constant_init(m.bias, 0)
elif isinstance(m, nn.Conv2d):
kaiming_init(m.weight, mode='fan_in')
if m.bias is not None:
constant_init(m.bias, 0)
elif isinstance(m, (_BatchNorm, nn.GroupNorm, nn.LayerNorm)):
constant_init(m.bias, 0)
constant_init(m.weight, 1.0)
def init_weights(self):
for m in self.modules():
if hasattr(m, "kaiming_init") and m.kaiming_init:
kaiming_init(
m,
mode="fan_in",
nonlinearity="leaky_relu",
bias=0,
distribution="uniform",
a=1,
)
def _init_weights(self):
for m in self.modules():
if isinstance(m, nn.Conv3d):
kaiming_init(m)
elif isinstance(m, _BatchNorm):
constant_init(m, 1)
if self.zero_init_residual:
for m in self.modules():
if isinstance(m, BlockX3D):
constant_init(m.conv3.bn, 0)
def init_weights(self):
if self.init_method == 'xavier':
xavier_init(self.conv[0])
xavier_init(self.conv[1])
elif self.init_method == 'kaiming':
kaiming_init(self.conv[0], nonlinearity='relu')
kaiming_init(self.conv[1], nonlinearity='relu')
else:
raise ValueError(f"Unkonw init method {self.init_method}")
if self.with_norm:
constant_init(self.norm, 1, bias=0)
def init_weights(self):
if self.with_activatation and \
self.act_cfg.get('type').lower() == 'leakyrelu':
nonlinearity = 'leaky_relu'
a = self.act_cfg.get('negative_slope', 0.01)
else:
nonlinearity = 'relu'
a = 0
kaiming_init(self.conv, a=a, nonlinearity=nonlinearity)
if self.with_norm:
constant_init(self.norm, 1, bias=0)
def init_weights(self, pretrained=None):
# init for backbone
self.backbone.init_weights(pretrained=pretrained)
# init for classifier
for m in self.classifier.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
state_dict = torch.load(pretrained)
if 'state_dict' in state_dict:
state_dict = state_dict['state_dict']
if self.width_mult < 1.0:
patched_dict = {}
for k, v in state_dict.items():
if 'backbone.' in k:
k = k[len('backbone.'):]
if 'features.17.conv' in k and self.single_scale:
continue
if 'conv' in k: # process convs in inverted residuals
if len(v.shape) == 1:
v = v[:int(v.shape[0] * self.width_mult)]
elif len(v.shape) == 4 and v.shape[1] == 1:
assert v.shape[2] == v.shape[3] and v.shape[2] == 3
v = v[:int(v.shape[0] * self.width_mult), ]
elif len(v.shape) == 4 and v.shape[2] == 1:
assert v.shape[2] == v.shape[3] and v.shape[2] == 1
v = v[:int(v.shape[0] * self.width_mult
), :int(v.shape[1] * self.width_mult), ]
elif 'features.0.' in k: # process the first conv
if len(v.shape):
v = v[:int(v.shape[0] * self.width_mult), ]
patched_dict[k] = v
self.load_state_dict(patched_dict, strict=False)
elif self.width_mult == 1.0:
patched_dict = {}
if self.single_scale:
for k, v in state_dict.items():
if 'features.17.conv' in k:
continue
patched_dict[k] = v
else:
patched_dict = state_dict
self.load_state_dict(patched_dict, strict=False)
else:
print('Warning: loading of pre-trained weights is not \
supported for MobileNetV2 with width_mult > 1')
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self):
nonlinearity = 'relu' if self.activation is None else self.activation
if not self.is_mink:
kaiming_init(self.conv, nonlinearity=nonlinearity)
if self.with_norm:
constant_init(self.norm, 1, bias=0)
else:
#kaiming_init(self.conv.conv, nonlinearity=nonlinearity)
if self.with_norm:
nn.init.constant_(self.norm.bn.weight, 1)
nn.init.constant_(self.norm.bn.bias, 0)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
load_checkpoint(self, pretrained, strict=False)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (_BatchNorm, nn.GroupNorm)):
constant_init(m, 1)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = get_root_logger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
# load_pretrained_weights(self, self._model_name, load_fc=False)
else:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (_BatchNorm, nn.GroupNorm)):
constant_init(m, 1)
def init_weights(self):
if self.with_embedding:
for m in self.modules():
if isinstance(m, nn.Conv2d) or isinstance(m, nn.Conv3d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d) or isinstance(
m, nn.BatchNorm3d):
constant_init(m, 1.0, 0.0)
else:
nn.init.normal_(self.fc_cls_out.weight, 0, self.init_std)
nn.init.constant_(self.fc_cls_out.bias, 0)
def init_weights(self):
if isinstance(self.pretrained, str):
logger = logging.getLogger()
if self.pretrained2d:
resnet2d = ResNet(self.depth)
load_checkpoint(resnet2d,
self.pretrained,
strict=False,
logger=logger)
for name, module in self.named_modules():
if isinstance(module, NonLocalModule):
module.init_weights()
elif isinstance(module, nn.Conv3d) and rhasattr(
resnet2d, name):
new_weight = rgetattr(resnet2d, name).weight.data.unsqueeze(2).expand_as(module.weight) / \
module.weight.data.shape[2]
module.weight.data.copy_(new_weight)
logging.info(
"{}.weight loaded from weights file into {}".
format(name, new_weight.shape))
if hasattr(module, 'bias') and module.bias is not None:
new_bias = rgetattr(resnet2d, name).bias.data
module.bias.data.copy_(new_bias)
logging.info(
"{}.bias loaded from weights file into {}".
format(name, new_bias.shape))
elif isinstance(module, nn.BatchNorm3d) and rhasattr(
resnet2d, name):
for attr in [
'weight', 'bias', 'running_mean', 'running_var'
]:
logging.info(
"{}.{} loaded from weights file into {}".
format(
name, attr,
getattr(rgetattr(resnet2d, name),
attr).shape))
setattr(module, attr,
getattr(rgetattr(resnet2d, name), attr))
else:
load_checkpoint(self,
self.pretrained,
strict=False,
logger=logger)
elif self.pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv3d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm3d):
constant_init(m, 1)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = logging.getLogger()
if 'pytorch-classification' in pretrained: # load my model
print('loading lx pretrained model...', pretrained)
checkpoint = torch.load(pretrained)
own_state = self.state_dict()
state_dict = {k[7:]: v for k, v in checkpoint['state_dict'].items()}
print('best acc = ', checkpoint['best_acc'])
unexpected_keys = []
for name, param in state_dict.items():
if name not in own_state:
unexpected_keys.append(name)
continue
if isinstance(param, torch.nn.Parameter):
param = param.data
print(param)
try:
own_state[name].copy_(param)
except Exception:
raise RuntimeError('While copying parameter named {}, whose dimensions in the model are {} and whose dimensions in the checkpoint are {}.'.format(name, own_state[name].size(), param.size()))
missing_keys = set(own_state.keys()) - set(state_dict.keys())
err_msg = []
if unexpected_keys:
err_msg.append('unexpected key in source state_dict: {}\n\n'.format(', '.join(unexpected_keys)))
if missing_keys:
err_msg.append('missing keys in source state_dict: {}\n\n'.format(', '.join(missing_keys)))
if err_msg: logger.warn(err_msg)
else:
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (nn.BatchNorm2d, nn.GroupNorm)):
constant_init(m, 1)
if self.dcn is not None:
for m in self.modules():
if isinstance(m, Bottleneck) and hasattr(
m, 'conv2_offset'):
constant_init(m.conv2_offset, 0)
if self.zero_init_residual:
for m in self.modules():
if isinstance(m, Bottleneck):
constant_init(m.norm3, 0)
elif isinstance(m, BasicBlock):
constant_init(m.norm2, 0)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = get_root_logger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
kaiming_init(self.st_feat_conv)
kaiming_init(self.lt_feat_conv)
for layer_name in self.non_local_layers:
non_local_layer = getattr(self, layer_name)
non_local_layer.init_weights(pretrained=pretrained)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = get_root_logger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (nn.BatchNorm2d, nn.GroupNorm)):
constant_init(m, 1)
else:
raise TypeError('pretrained must be a str and should not be None')
def init_weights(self, pretrained=None):
super().init_weights(pretrained)
if pretrained is None:
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, _BatchNorm):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
else:
raise TypeError('pretrained must be a str or None')
def init_weights(self):
for m in self.features.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
constant_init(m, 1)
elif isinstance(m, nn.Linear):
normal_init(m, std=0.01)
for m in self.extra.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform')
def init_weights(self, pretrained=None):
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, (_BatchNorm, nn.GroupNorm)):
constant_init(m, 1)
if self.zero_init_residual:
for m in self.modules():
if isinstance(m, Bottleneck):
constant_init(m.norm3, 0)
elif isinstance(m, BasicBlock):
constant_init(m.norm2, 0)
def init_weights(self):
for conv in self.convs:
kaiming_init(conv)
for fc in self.fcs:
kaiming_init(
fc,
a=1,
mode="fan_in",
nonlinearity="leaky_relu",
distribution="uniform",
)
normal_init(self.fc_mask_iou, std=0.01)
def init_weights(self, pretrained=None):
for m in self.modules():
if isinstance(m, nn.Conv2d):
kaiming_init(m)
elif isinstance(m, nn.BatchNorm2d):
if m.weight is not None and m.bias is not None:
m.weight.data.fill_(1)
m.bias.data.zero_()
if pretrained.use_load:
model_dict = remap_for_archadapt(pretrained.load_path, self.state_dict(), pretrained.seed_num_layers)
self.load_state_dict(model_dict)
def init_weights(self, pretrained=None):
if isinstance(pretrained, str):
logger = get_root_logger()
load_checkpoint(self, pretrained, strict=False, logger=logger)
elif pretrained is None:
for m in self.res_blocks:
for n in m.conv_block:
if isinstance(n, nn.Conv2d):
kaiming_init(n)
elif isinstance(n, nn.BatchNorm2d):
constant_init(n, 1)
else:
raise TypeError('pretrained must be a str or None')
