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Can you teach me use model ST-GCN in python

Posted 9 months ago
Votes Newest


Yes, I can give you a brief overview of how to use the ST-GCN (Spatio-Temporal Graph Convolutional Networks) model in Python. ST-GCN is a deep learning model designed for action recognition in videos.

Here are the steps to use the ST-GCN model:

Install PyTorch and other necessary libraries like NumPy, OpenCV, etc.

Download the ST-GCN repository from GitHub: https://github.com/yysijie/st-gcn.

Install the ST-GCN library by running the following command in the terminal:

pip install torch torchvision tensorboardX

Load the ST-GCN model and its dependencies using the following code:


from STGCN import Model

model = Model(in_channels=3, num_class=60, graph_args={'layout': 'ntu-rgb+d', 'strategy': 'spatial'})

Here, the in_channels parameter specifies the number of input channels, num_class specifies the number of classes to be predicted, and graph_args specifies the graph configuration used by the model.

Prepare your input data for the model. The input data for ST-GCN is a sequence of video frames. You can use a video file or a sequence of image files to create the input data.

Preprocess the input data. The input data needs to be preprocessed to be compatible with the ST-GCN model. The preprocessing steps include resizing, normalization, and converting the data to a tensor.


import cv2
import numpy as np
import torch

# Load the video file
cap = cv2.VideoCapture("video.mp4")

# Create a list to store the frames
frames = []

# Loop through the video frames
while True:
    ret, frame = cap.read()
    if not ret:

    # Preprocess the frame
    frame = cv2.resize(frame, (224, 224))
    frame = frame / 255.0
    frame = np.transpose(frame, (2, 0, 1))

# Convert the list of frames to a tensor
input_data = torch.tensor(frames, dtype=torch.float32)

Run the input data through the ST-GCN model to make predictions.


# Run the input data through the model
with torch.no_grad():
		output = model(input_data)

# Get the predicted class
predicted_class = torch.argmax(output, dim=1).item()
Here, the output variable contains the predicted class probabilities for each frame in the input data. You can get the predicted class by taking the argmax of the output tensor.

That's it! This is a brief overview of how to use the ST-GCN model in Python. Please note that this is just an example, and you may need to modify the code to suit your specific use case.

Posted 9 months ago
Edited 9 months ago
425 × 6 Administrator