opencv: DNN: Required argument "split" not found into dictionary

System information (version)

OpenCV => 4.2.0
Operating System / Platform => Windows 64 Bit
Compiler => Visual Studio 2019

Detailed description

I’m trying to inference classification model trained on Custom Vision of Azure Cognitive Services using OpenCV DNN module.
Custom Vision can download trained ONNX model. The following error occurs when read net from it.

OpenCV: terminate handler is called! The last OpenCV error is:
OpenCV(4.2.0) Error: Requested object was not found (Required argument "split" not found into dictionary) in cv::dnn::dnn4_v20191202::Dict::get, file C:\opencv-4.2.0\modules\dnn\include\opencv2/dnn/dnn.inl.hpp, line 349

This is part of model visualize image using Netron. 2020-01-17_10h51_43 (Other model visualize image is here. All model visualize image is here.)

What do you think? Thanks,

Steps to reproduce

This issue can be reproduced with the following code:

const std::string model = "./model.onnx";
cv::dnn::Net net = cv::dnn::readNet( model ); // error

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 15 (15 by maintainers)

Most upvoted comments

@czgdp1807 Thank you for looking on this!

“Expected output” is handling ONNX operation properly (including its possible parameters/inputs/modes). Documentation about ONNX Split operation is here.

Some of ONNX testdata cases are generated through this script (using PyTorch and exporting to ONNX).

alalek on Jan 23, 2020

@UnaNancyOwen Thanks for the updates. Though I am sure that bug in processing of Split layer has been fixed. I will try to fix the problems with Constant layer as soon as possible.

czgdp1807 on Jan 25, 2020

@czgdp1807 Yes =)

alalek on Jan 22, 2020

Hi @UnaNancyOwen @alalek I think I am able to reproduce the error. Code

// opencv_debug.cpp
#include<opencv2/dnn.hpp>
int main()
{
    const std::string model = "./model.onnx";
    cv::dnn::Net net = cv::dnn::readNet( model ); // error
}

I used, g++ opencv_debug.cpp -o issue_16370 -lopencv_dnn -lopencv_core and got the following,

terminate called after throwing an instance of 'cv::Exception'  what():  OpenCV(3.4.9-dev) /home/czgdp1807/opencv_project/opencv/modules/dnn/include/opencv2/dnn/dnn.inl.hpp:333: error: (-204:Requested object was not found) Required argument "split" not found into dictionary in function 'get'Aborted (core dumped)

Can I start working on this issue as it appears that no PR has referenced this issue.

czgdp1807 on Jan 22, 2020