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@ -18,7 +18,7 @@ import torch.nn as nn
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import torch.nn.functional as F
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from timm.data import IMAGENET_DEFAULT_MEAN, IMAGENET_DEFAULT_STD
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from .helpers import load_pretrained
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from .helpers import build_model_with_cfg
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from .layers import SelectAdaptivePool2d
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from .registry import register_model
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@ -229,8 +229,8 @@ class SEResNetBlock(nn.Module):
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class SENet(nn.Module):
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def __init__(self, block, layers, groups, reduction, drop_rate=0.2,
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in_chans=3, inplanes=128, input_3x3=True, downsample_kernel_size=3,
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downsample_padding=1, num_classes=1000, global_pool='avg'):
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in_chans=3, inplanes=64, input_3x3=False, downsample_kernel_size=1,
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downsample_padding=0, num_classes=1000, global_pool='avg'):
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"""
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Parameters
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----------
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@ -297,10 +297,10 @@ class SENet(nn.Module):
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('bn1', nn.BatchNorm2d(inplanes)),
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('relu1', nn.ReLU(inplace=True)),
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]
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# To preserve compatibility with Caffe weights `ceil_mode=True`
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# is used instead of `padding=1`.
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layer0_modules.append(('pool', nn.MaxPool2d(3, stride=2, ceil_mode=True)))
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self.layer0 = nn.Sequential(OrderedDict(layer0_modules))
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# To preserve compatibility with Caffe weights `ceil_mode=True` is used instead of `padding=1`.
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self.pool0 = nn.MaxPool2d(3, stride=2, ceil_mode=True)
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self.feature_info = [dict(num_chs=inplanes, reduction=2, module='layer0')]
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self.layer1 = self._make_layer(
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block,
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planes=64,
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@ -310,6 +310,7 @@ class SENet(nn.Module):
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downsample_kernel_size=1,
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downsample_padding=0
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)
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self.feature_info += [dict(num_chs=64 * block.expansion, reduction=4, module='layer1')]
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self.layer2 = self._make_layer(
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block,
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planes=128,
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@ -320,6 +321,7 @@ class SENet(nn.Module):
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downsample_kernel_size=downsample_kernel_size,
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downsample_padding=downsample_padding
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)
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self.feature_info += [dict(num_chs=128 * block.expansion, reduction=8, module='layer2')]
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self.layer3 = self._make_layer(
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block,
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planes=256,
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@ -330,6 +332,7 @@ class SENet(nn.Module):
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downsample_kernel_size=downsample_kernel_size,
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downsample_padding=downsample_padding
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)
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self.feature_info += [dict(num_chs=256 * block.expansion, reduction=16, module='layer3')]
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self.layer4 = self._make_layer(
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block,
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planes=512,
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@ -340,8 +343,9 @@ class SENet(nn.Module):
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downsample_kernel_size=downsample_kernel_size,
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downsample_padding=downsample_padding
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)
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self.avg_pool = SelectAdaptivePool2d(pool_type=global_pool)
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self.feature_info += [dict(num_chs=512 * block.expansion, reduction=32, module='layer4')]
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self.num_features = 512 * block.expansion
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self.global_pool = SelectAdaptivePool2d(pool_type=global_pool)
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self.last_linear = nn.Linear(self.num_features, num_classes)
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for m in self.modules():
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@ -352,14 +356,13 @@ class SENet(nn.Module):
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downsample = None
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if stride != 1 or self.inplanes != planes * block.expansion:
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downsample = nn.Sequential(
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nn.Conv2d(self.inplanes, planes * block.expansion,
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kernel_size=downsample_kernel_size, stride=stride,
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padding=downsample_padding, bias=False),
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nn.Conv2d(
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self.inplanes, planes * block.expansion, kernel_size=downsample_kernel_size,
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stride=stride, padding=downsample_padding, bias=False),
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nn.BatchNorm2d(planes * block.expansion),
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)
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layers = [block(
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self.inplanes, planes, groups, reduction, stride, downsample)]
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layers = [block(self.inplanes, planes, groups, reduction, stride, downsample)]
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self.inplanes = planes * block.expansion
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for i in range(1, blocks):
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layers.append(block(self.inplanes, planes, groups, reduction))
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@ -371,15 +374,16 @@ class SENet(nn.Module):
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def reset_classifier(self, num_classes, global_pool='avg'):
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self.num_classes = num_classes
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self.avg_pool = SelectAdaptivePool2d(pool_type=global_pool)
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self.global_pool = SelectAdaptivePool2d(pool_type=global_pool)
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if num_classes:
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num_features = self.num_features * self.avg_pool.feat_mult()
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num_features = self.num_features * self.global_pool.feat_mult()
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self.last_linear = nn.Linear(num_features, num_classes)
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else:
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self.last_linear = nn.Identity()
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def forward_features(self, x):
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x = self.layer0(x)
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x = self.pool0(x)
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x = self.layer1(x)
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x = self.layer2(x)
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x = self.layer3(x)
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@ -387,7 +391,7 @@ class SENet(nn.Module):
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return x
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def logits(self, x):
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x = self.avg_pool(x).flatten(1)
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x = self.global_pool(x).flatten(1)
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if self.drop_rate > 0.:
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x = F.dropout(x, p=self.drop_rate, training=self.training)
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x = self.last_linear(x)
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@ -399,116 +403,70 @@ class SENet(nn.Module):
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return x
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def _create_senet(variant, pretrained=False, **kwargs):
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return build_model_with_cfg(
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SENet, variant, default_cfg=default_cfgs[variant], pretrained=pretrained, **kwargs)
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@register_model
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def legacy_seresnet18(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnet18']
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model = SENet(SEResNetBlock, [2, 2, 2, 2], groups=1, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnet18(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNetBlock, layers=[2, 2, 2, 2], groups=1, reduction=16, **kwargs)
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return _create_senet('seresnet18', pretrained, **model_args)
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@register_model
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def legacy_seresnet34(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnet34']
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model = SENet(SEResNetBlock, [3, 4, 6, 3], groups=1, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnet34(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNetBlock, layers=[3, 4, 6, 3], groups=1, reduction=16, **kwargs)
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return _create_senet('seresnet34', pretrained, **model_args)
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@register_model
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def legacy_seresnet50(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnet50']
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model = SENet(SEResNetBottleneck, [3, 4, 6, 3], groups=1, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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model_args = dict(
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block=SEResNetBottleneck, layers=[3, 4, 6, 3], groups=1, reduction=16, **kwargs)
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return _create_senet('seresnet50', pretrained, **model_args)
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@register_model
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def legacy_seresnet101(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnet101']
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model = SENet(SEResNetBottleneck, [3, 4, 23, 3], groups=1, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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model_args = dict(
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block=SEResNetBottleneck, layers=[3, 4, 23, 3], groups=1, reduction=16, **kwargs)
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return _create_senet('seresnet101', pretrained, **model_args)
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@register_model
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def legacy_seresnet152(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnet152']
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model = SENet(SEResNetBottleneck, [3, 8, 36, 3], groups=1, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnet152(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNetBottleneck, layers=[3, 8, 36, 3], groups=1, reduction=16, **kwargs)
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return _create_senet('seresnet152', pretrained, **model_args)
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@register_model
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def legacy_senet154(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['senet154']
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model = SENet(SEBottleneck, [3, 8, 36, 3], groups=64, reduction=16,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_senet154(pretrained=False, **kwargs):
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model_args = dict(
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block=SEBottleneck, layers=[3, 8, 36, 3], groups=64, reduction=16,
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downsample_kernel_size=3, downsample_padding=1, inplanes=128, input_3x3=True, **kwargs)
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return _create_senet('senet154', pretrained, **model_args)
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@register_model
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def legacy_seresnext26_32x4d(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnext26_32x4d']
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model = SENet(SEResNeXtBottleneck, [2, 2, 2, 2], groups=32, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnext26_32x4d(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNeXtBottleneck, layers=[2, 2, 2, 2], groups=32, reduction=16, **kwargs)
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return _create_senet('seresnext26_32x4d', pretrained, **model_args)
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@register_model
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def legacy_seresnext50_32x4d(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnext50_32x4d']
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model = SENet(SEResNeXtBottleneck, [3, 4, 6, 3], groups=32, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnext50_32x4d(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNeXtBottleneck, layers=[3, 4, 6, 3], groups=32, reduction=16, **kwargs)
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return _create_senet('seresnext50_32x4d', pretrained, **model_args)
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@register_model
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def legacy_seresnext101_32x4d(pretrained=False, num_classes=1000, in_chans=3, **kwargs):
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default_cfg = default_cfgs['seresnext101_32x4d']
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model = SENet(SEResNeXtBottleneck, [3, 4, 23, 3], groups=32, reduction=16,
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inplanes=64, input_3x3=False,
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downsample_kernel_size=1, downsample_padding=0,
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num_classes=num_classes, in_chans=in_chans, **kwargs)
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model.default_cfg = default_cfg
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if pretrained:
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load_pretrained(model, default_cfg, num_classes, in_chans)
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return model
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def legacy_seresnext101_32x4d(pretrained=False, **kwargs):
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model_args = dict(
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block=SEResNeXtBottleneck, layers=[3, 4, 23, 3], groups=32, reduction=16, **kwargs)
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return _create_senet('seresnext101_32x4d', pretrained, **model_args)
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