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https://github.com/yv1ing/ShotRDP.git
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73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
import torch
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import torch.nn as nn
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# 轻量双通道注意力
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class LiteDualAttention(nn.Module):
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def __init__(self, in_channels):
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super().__init__()
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self.channel_attn = nn.Sequential(
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nn.AdaptiveAvgPool2d(1),
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nn.Conv2d(in_channels, in_channels // 16, 1, bias=False),
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nn.SiLU(),
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nn.Conv2d(in_channels // 16, in_channels, 1, bias=False),
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nn.Sigmoid()
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)
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self.spatial_attn = nn.Sequential(
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nn.Conv2d(2, 1, 5, padding=2, bias=False),
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nn.Sigmoid()
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)
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def forward(self, x):
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# 通道加权
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ca = self.channel_attn(x) * x
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# 空间特征统计（均值+标准差）
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stats = torch.cat([
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x.mean(dim=1, keepdim=True),
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x.std(dim=1, keepdim=True)
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], dim=1)
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# 空间加权（5x5卷积生成单通道注意力）
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sa = self.spatial_attn(stats) * ca
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return sa
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class CNNClassifier(nn.Module):
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def __init__(self, num_classes):
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super().__init__()
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self.features = nn.Sequential(
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nn.Conv2d(3, 32, 3, stride=2, padding=1, bias=False),
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LiteDualAttention(32),
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nn.BatchNorm2d(32),
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nn.Hardswish(inplace=True),
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nn.Conv2d(32, 48, 3, stride=2, padding=1, bias=False),
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LiteDualAttention(48),
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nn.BatchNorm2d(48),
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nn.Hardswish(inplace=True),
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nn.Conv2d(48, 64, 3, stride=2, padding=1, bias=False),
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LiteDualAttention(64),
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nn.BatchNorm2d(64),
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nn.Hardswish(inplace=True),
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nn.Conv2d(64, 96, 3, padding=2, dilation=2, bias=False),
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LiteDualAttention(96),
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nn.BatchNorm2d(96),
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nn.Hardswish(inplace=True)
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)
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self.classifier = nn.Sequential(
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nn.AdaptiveAvgPool2d(1),
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nn.Flatten(),
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nn.Linear(96, 256),
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nn.Hardswish(inplace=True),
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nn.Dropout(0.3),
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nn.Linear(256, num_classes)
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)
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def forward(self, x):
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return self.classifier(self.features(x))
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