Pytorch实时手势识别
时间: 2023-10-11 16:05:55 浏览: 161
石头-剪刀-布手势实时识别(Pytorch and GUI).zip
PyTorch是一个Python优先的深度学习框架,可以用于实时手势识别。实时手势识别是指在实时视频流中检测和识别手势动作。以下是一个简单的实现步骤:
1.准备数据集:收集手势数据,并将其标记为不同的手势类别。
2.数据预处理:将数据集分成训练集和测试集,并对其进行图像增强和标准化。
3.模型建立:使用PyTorch构建深度学习模型,例如卷积神经网络(CNN)。
4.模型训练:使用训练集对模型进行训练,以学习手势识别模式。
5.模型测试:使用测试集评估模型的性能,并进行必要的调整。
6.实时应用:将经过训练的模型应用于实时视频流中,使用摄像头捕捉和识别手势动作。
以下是一个简单的PyTorch实现手势识别的代码示例:
```python
import torch
import torch.nn as nn
import torchvision.transforms as transforms
from torch.autograd import Variable
# 创建数据集
data_transforms = transforms.Compose([
transforms.RandomResizedCrop(224),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize(mean=[0.485, 0.456, 0.406],
std=[0.229, 0.224, 0.225])
])
# 创建模型
class GestureNet(nn.Module):
def __init__(self):
super(GestureNet, self).__init__()
self.conv1 = nn.Conv2d(3, 64, kernel_size=3, stride=1, padding=1)
self.pool1 = nn.MaxPool2d(kernel_size=2, stride=2)
self.conv2 = nn.Conv2d(64, 128, kernel_size=3, stride=1, padding=1)
self.pool2 = nn.MaxPool2d(kernel_size=2, stride=2)
self.conv3 = nn.Conv2d(128, 256, kernel_size=3, stride=1, padding=1)
self.pool3 = nn.MaxPool2d(kernel_size=2, stride=2)
self.fc1 = nn.Linear(256 * 28 * 28, 1024)
self.fc2 = nn.Linear(1024, 512)
self.fc3 = nn.Linear(512, 5)
def forward(self, x):
x = self.pool1(torch.relu(self.conv1(x)))
x = self.pool2(torch.relu(self.conv2(x)))
x = self.pool3(torch.relu(self.conv3(x)))
x = x.view(-1, 256 * 28 * 28)
x = torch.relu(self.fc1(x))
x = torch.relu(self.fc2(x))
x = self.fc3(x)
return x
# 训练模型
model = GestureNet()
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.SGD(model.parameters(), lr=0.001, momentum=0.9)
num_epochs = 10
for epoch in range(num_epochs):
for i, (images, labels) in enumerate(train_loader):
images = Variable(images)
labels = Variable(labels)
optimizer.zero_grad()
outputs = model(images)
loss = criterion(outputs, labels)
loss.backward()
optimizer.step()
if (i + 1) % 100 == 0:
print('Epoch [%d/%d], Step [%d/%d], Loss: %.4f'
% (epoch + 1, num_epochs, i + 1, len(train_dataset) // batch_size, loss.item()))
# 测试模型
correct = 0
total = 0
for images, labels in test_loader:
images = Variable(images)
outputs = model(images)
_, predicted = torch.max(outputs.data, 1)
total += labels.size(0)
correct += (predicted == labels).sum()
print('Accuracy of the network on the test images: %d %%' % (100 * correct / total))
# 实时应用
import cv2
cap = cv2.VideoCapture(0)
while (True):
ret, frame = cap.read()
img = data_transforms(frame)
img = img.unsqueeze(0)
img = Variable(img)
output = model(img)
_, predicted = torch.max(output.data, 1)
cv2.putText(frame, str(predicted.item()), (50, 50), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 255, 0), thickness=2)
cv2.imshow('Real-time Gesture Recognition', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
```
该代码示例中使用了一个简单的卷积神经网络(CNN)对手势数据进行训练,并在实时视频流中进行手势识别。但是,这只是一个示例,实际应用中需要更复杂的模型和更大的数据集来提高识别准确度。
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