ResNet的结构,并用PyTorch实现后在控制台显示模型参数?
时间: 2024-05-08 13:19:24 浏览: 6
ResNet是一种用于深度学习中的残差神经网络结构,其主要目的是解决深度神经网络中的梯度弥散和梯度爆炸问题。关于如何在PyTorch中实现ResNet并在控制台显示模型参数,您可以通过使用PyTorch内置的torchvision模块来轻松实现。以下是一个示例代码:
```python
import torch
import torch.nn as nn
import torch.optim as optim
import torchvision.models.resnet as resnet
# 定义 ResNet 模型
model = resnet.resnet18()
# 显示模型参数
for name, param in model.named_parameters():
print(name, '\t', param.size())
# 计算模型总参数量
n_params = sum(p.numel() for p in model.parameters() if p.requires_grad)
print('Total # of parameters:', n_params)
```
希望这可以帮助您。
相关问题
pytorch实现ResNet50模型
PyTorch实现ResNet50模型的代码如下所示:
```python
import torch
import torchvision.models as models
# 加载预训练的ResNet50模型
model = models.resnet50(pretrained=True)
# 替换最后一层全连接层的输出类别数
num_classes = 1000 # 假设分类数为1000
model.fc = torch.nn.Linear(model.fc.in_features, num_classes)
# 将模型设置为评估模式
model.eval()
```
在这段代码中,我们首先导入了`torch`和`torchvision.models`模块。然后,我们使用`models.resnet50(pretrained=True)`加载了预训练的ResNet50模型。接下来,我们替换了模型的最后一层全连接层,将其输出类别数设置为我们需要的分类数。最后,我们将模型设置为评估模式。
请注意,这段代码中没有使用到引用\[1\]、\[2\]和\[3\]中的具体内容,因为这些内容与问题的回答无关。
#### 引用[.reference_title]
- *1* [关于pytorch直接加载resnet50模型及模型参数](https://blog.csdn.net/eye123456789/article/details/124948949)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [pytorch实现resnet50(训练+测试+模型转换)](https://blog.csdn.net/gm_Ergou/article/details/118419795)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
微调resnet模型 mnist pytorch
可以使用以下代码来微调resnet模型在mnist数据集上:
```python
import torch
import torch.nn as nn
import torch.optim as optim
import torchvision
import torchvision.transforms as transforms
from torchvision.models import resnet18
# Load MNIST dataset
transform = transforms.Compose(
[transforms.Resize((224, 224)),
transforms.ToTensor(),
transforms.Normalize((0.1307,), (0.3081,))])
trainset = torchvision.datasets.MNIST(root='./data', train=True,
download=True, transform=transform)
trainloader = torch.utils.data.DataLoader(trainset, batch_size=32,
shuffle=True, num_workers=2)
testset = torchvision.datasets.MNIST(root='./data', train=False,
download=True, transform=transform)
testloader = torch.utils.data.DataLoader(testset, batch_size=32,
shuffle=False, num_workers=2)
# Define resnet model
model = resnet18(pretrained=True)
num_ftrs = model.fc.in_features
model.fc = nn.Linear(num_ftrs, 10)
# Define loss function and optimizer
criterion = nn.CrossEntropyLoss()
optimizer = optim.SGD(model.parameters(), lr=0.001, momentum=0.9)
# Train the model
for epoch in range(10):
running_loss = 0.0
for i, data in enumerate(trainloader, 0):
inputs, labels = data
optimizer.zero_grad()
outputs = model(inputs)
loss = criterion(outputs, labels)
loss.backward()
optimizer.step()
running_loss += loss.item()
if i % 100 == 99:
print('[%d, %5d] loss: %.3f' %
(epoch + 1, i + 1, running_loss / 100))
running_loss = 0.0
print('Finished Training')
# Test the model
correct = 0
total = 0
with torch.no_grad():
for data in testloader:
images, labels = data
outputs = model(images)
_, predicted = torch.max(outputs.data, 1)
total += labels.size(0)
correct += (predicted == labels).sum().item()
print('Accuracy of the network on the 10000 test images: %d %%' % (
100 * correct / total))
```
这段代码会加载resnet18模型,并在MNIST数据集上微调它。我们首先将MNIST图像的大小调整为224x224,然后将其输入到resnet模型中。我们还将resnet的最后一层替换为一个具有10个输出的全连接层,以便我们可以对MNIST数据集进行分类。我们使用交叉熵损失函数和随机梯度下降优化器来训练模型。在训练完成后,我们使用测试集来评估模型的准确性。