mirror of https://github.com/JDAI-CV/fast-reid.git
26 lines
681 B
Python
26 lines
681 B
Python
# encoding: utf-8
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"""
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@author: liaoxingyu
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@contact: sherlockliao01@gmail.com
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"""
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from torch import nn
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class SELayer(nn.Module):
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def __init__(self, channel, reduction=16):
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super(SELayer, self).__init__()
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self.avg_pool = nn.AdaptiveAvgPool2d(1)
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self.fc = nn.Sequential(
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nn.Linear(channel, int(channel / reduction), bias=False),
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nn.ReLU(inplace=True),
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nn.Linear(int(channel / reduction), channel, bias=False),
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nn.Sigmoid()
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)
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def forward(self, x):
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b, c, _, _ = x.size()
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y = self.avg_pool(x).view(b, c)
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y = self.fc(y).view(b, c, 1, 1)
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return x * y.expand_as(x)
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