Strange error in getMemoryShapes function

dnn
readNet

asked 2019-02-24 16:27:22 -0600

updated 2019-02-25 01:46:59 -0600

berak
32993 ●7 ●81 ●312

Hello everyone! Currently, I'm try to solve the object detection task. The model in used is MobileNetV1 + SSD from https://github.com/qfgaohao/pytorch-s..., The code was written in PyTorch framework. In order to use this model in OpenvCV library I converted it to ONNX representation by the standard torch.onnx module. But when I'm try to read this .onnx file I get the next error: cv2.error: OpenCV(4.0.1-dev) /home/user/opencv/modules/dnn/src/layers/slice_layer.cpp:129: error: (-215:Assertion failed) inputs.size() == 1 in function 'getMemoryShapes'

I'd like to note that when I'm cnonvert only MobileNetV1 in ONNX representation and read it through the dnn.readNetFromONNX(net) I don't get the above error. All works well.

What am I doing wrong?

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Could you please add a model file?

dkurt ( 2019-02-25 01:13:43 -0600 )edit

@dkurt yes, of course. Here the graph of the model(MobileNetV1 + SSD) and his .onnx file. https://drive.google.com/drive/folder...

r3krut ( 2019-02-25 04:22:46 -0600 )edit

Model input is batch with size (1, 3, 300, 300)

r3krut ( 2019-02-25 04:26:10 -0600 )edit

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answered 2019-04-15 04:06:36 -0600

zheng lilei
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Same error observed.

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https://drive.google.com/drive/folder... Link to the model, which is quite similar to r3krut's

zheng lilei ( 2019-04-15 22:15:02 -0600 )edit

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answered 2019-05-25 09:19:29 -0600

datascientist
11 ●2 ●1

I got the same error in 4.0, 4.1 and the master builds, while trying to import resnet50.onnx, which is the result of onnx export of the existing pretrained resnet50 PyTorch model. You can generate the model using this code.

import torch, torchvision

dummy_input = torch.randn(1, 3, 224, 224)

model = torchvision.models.resnet50(pretrained=True)

torch.onnx.export(model, dummy_input, "resnet50.onnx")

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Strange error in getMemoryShapes function

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