Only image inputs are supported for import using 'importONNXNetwork'

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My question in regarding the add-on 'importONNXNetwork'.
I am unable to load a ONNX model in MATLAB (2018b). The model is trained in PyTorch.
Input to the model is a vector and not an image.
I get following error: 'Only image inputs are supported for import'.
I am wondering if this is because MATLAB add-on doesn't (yet) support loading of ONNX models with non-image inputs.
Please let me know. Thanks in advance.

Answers (3)

matteo baigura
matteo baigura on 1 Feb 2020
Edited: matteo baigura on 1 Feb 2020
Same problem, if you are right that's simply ridicolous

Josiah Wai
Josiah Wai on 17 Jan 2022
Edited: Josiah Wai on 17 Jan 2022
I also had this problem and was able to get around it by reshaping the onnx input vector.
  1. To export from pytorch to onnx, follow the steps at However, before running the torch.onnx.export command, set the shape of your input vector x. In my case, each input sample vector has size 33, so I did: x = torch.randn(1,1,33, requires_grad=True)
  2. Import to Matlab
net = importONNXNetwork(modelfile, 'OutputLayerType', 'regression')
x = rand(33,1)
y = predict(net, x)

yanqi liu
yanqi liu on 17 Jan 2022
yes,sir,may be transfer data to cell and save as mat file,then use reshape to modify data dimension

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