如何在上述代码中添加spp模块
时间: 2024-01-10 20:03:59 浏览: 113
要在上述代码中添加SPP模块,可以按照以下步骤进行:
1. 在模型定义文件中添加SPP模块
在模型定义文件中,你需要添加一个新的SPP模块,这个模块应该包括该层的名称、类型、池化层大小和池化层步幅。例如,可以按照以下方式进行:
```
- spp:
num_levels: 5
pool_sizes: [5, 9, 13, 17, 21]
```
其中,`num_levels`表示SPP模块中的池化层数量,`pool_sizes`是一个列表,表示每个池化层的大小。
2. 在配置文件中添加SPP模块
在配置文件中,你需要添加一个新的SPP模块,这个模块应该包括该层的名称、类型和输入通道数。例如,可以按照以下方式进行:
```
- module:
type: "spp"
from: [-1, 1]
num_levels: 5
pool_sizes: [5, 9, 13, 17, 21]
```
其中,`from`表示SPP模块的输入,这里表示从前一个层连接。`num_levels`和`pool_sizes`与在模型定义文件中定义的层相同。
3. 更新模型权重
如果你添加了一个新的SPP模块,你需要更新你的模型权重,以便在训练和推理时使用新的模块。
以上是向神经网络中添加SPP模块的基本步骤。注意,你需要了解SPP模块的原理和使用方法,以便正确地添加和使用它。
相关问题
设计一个扩张卷积模块,具体过程为首先使用1×1深度可分离卷积压缩通道,然后使用不同大小的深度可分离卷积分别为5*5、7*7、9*9和由它们构造的不同膨胀速率的扩张卷积形成多个平行分支,膨胀率分别为5、7和9。此外,还有一个残差连接分支。最后,将这些并行分支的输出拼接在一起,再输出一个1×1深度可分离卷积,形成特征图y,请按照上述要求编写出可以应用到yolov5上的代码
以下是基于PyTorch实现的扩张卷积模块代码:
```python
import torch
import torch.nn as nn
import torch.nn.functional as F
class ExpandConv(nn.Module):
def __init__(self, in_channels, out_channels):
super(ExpandConv, self).__init__()
mid_channels = in_channels // 2
self.conv1 = nn.Sequential(
nn.Conv2d(in_channels, mid_channels, kernel_size=1),
nn.BatchNorm2d(mid_channels),
nn.ReLU(inplace=True)
)
self.conv2_5 = nn.Sequential(
nn.Conv2d(mid_channels, mid_channels, kernel_size=3, padding=2, dilation=2, groups=mid_channels),
nn.BatchNorm2d(mid_channels),
nn.ReLU(inplace=True),
nn.Conv2d(mid_channels, out_channels, kernel_size=1),
nn.BatchNorm2d(out_channels),
nn.ReLU(inplace=True)
)
self.conv2_7 = nn.Sequential(
nn.Conv2d(mid_channels, mid_channels, kernel_size=3, padding=3, dilation=3, groups=mid_channels),
nn.BatchNorm2d(mid_channels),
nn.ReLU(inplace=True),
nn.Conv2d(mid_channels, out_channels, kernel_size=1),
nn.BatchNorm2d(out_channels),
nn.ReLU(inplace=True)
)
self.conv2_9 = nn.Sequential(
nn.Conv2d(mid_channels, mid_channels, kernel_size=3, padding=4, dilation=4, groups=mid_channels),
nn.BatchNorm2d(mid_channels),
nn.ReLU(inplace=True),
nn.Conv2d(mid_channels, out_channels, kernel_size=1),
nn.BatchNorm2d(out_channels),
nn.ReLU(inplace=True)
)
self.residual = nn.Sequential(
nn.Conv2d(in_channels, out_channels, kernel_size=1),
nn.BatchNorm2d(out_channels),
nn.ReLU(inplace=True)
)
def forward(self, x):
x1 = self.conv1(x)
x2_5 = self.conv2_5(x1)
x2_7 = self.conv2_7(x1)
x2_9 = self.conv2_9(x1)
res = self.residual(x)
out = torch.cat([x2_5, x2_7, x2_9, res], dim=1)
out = nn.Conv2d(out.size(1), out.size(1), kernel_size=1)(out)
return out
```
在Yolov5的网络结构中,可以将这个扩张卷积模块嵌入到主干网络中,例如:
```python
import torch
import torch.nn as nn
from models.common import Conv, BottleneckCSP
from models.expand_conv import ExpandConv
class YoloV5(nn.Module):
def __init__(self, num_classes=80):
super(YoloV5, self).__init__()
self.num_classes = num_classes
self.backbone = nn.Sequential(
# C1
Conv(3, 32, 3, 1, activation='hardswish'),
# C2
BottleneckCSP(32, 64, n=2, shortcut=True),
# C3
BottleneckCSP(64, 128, n=3, shortcut=True),
# C4
BottleneckCSP(128, 256, n=9, shortcut=True),
# C5
BottleneckCSP(256, 512, n=9, shortcut=True),
# C6
BottleneckCSP(512, 1024, n=3, shortcut=False),
# SPP
Conv(1024, 1024, 1, 1, activation='hardswish'),
ExpandConv(1024, 1024),
Conv(1024, 512, 1, 1, activation='hardswish')
)
self.head = nn.Sequential(
# Final bottleneck
BottleneckCSP(512, 1024, shortcut=False),
# Detect
nn.Conv2d(1024, 255, kernel_size=1, stride=1, padding=0)
)
def forward(self, x):
x = self.backbone(x)
x = self.head(x)
x = x.view(x.size(0), -1, self.num_classes + 5)
return x
```
在SPP层之后,我们添加了一个ExpandConv模块,然后再接上一个1x1卷积层。注意,这里的512是SPP输出的通道数,1024是ExpandConv的输出通道数。
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