Exporting an ONNX Model from Caffe2

Caffe2 supports exporting models directly to ONNX. Here are the steps:

  1. Install Caffe2 by following the instructions provided in the official Caffe2 documentation.

  2. Import the necessary libraries in your Python script:

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    from caffe2.python.onnx import backend as caffe2_backend
    import torch.onnx
  3. Load your Caffe2 model into PyTorch:

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    # Assuming you already have a Caffe2 model loaded
    torch_model = torch.onnx.load("path/to/caffe2_model.pb")
  4. Export the PyTorch model to ONNX:

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    torch.onnx.export(torch_model, torch.randn(1, 3, 224, 224), "path/to/exported_model.onnx", verbose=True)

    Adjust the input shape and replace “path/to/exported_model.onnx” with the desired path to save the ONNX file.