Error while compiling : error: no match for ‘operator=’ (operand types are ‘op::Matrix’ and ‘const cv::Mat’) about ros_openpose HOT 6 CLOSED

I'm having the same problem with

• Ubuntu 18.04
• ROS Melodic
• Openpose > 1.5.1
• OpenCV 3.2
• Caffe (openpose branch)

Downgrading to OpenPose 1.5.1 fixed the issue.

from ros_openpose.

I think there will be some more probems with 1.6.0.
For instance, op::check was replace with op::checkBool.

from ros_openpose.

Hi @magi-dalmau

The error is generated due to the improper installation of OpenPose software.

1. Can you first remove OpenPose completely
2. And then try to checkout OpenPose version 1.5.1

Do not forget to run sudo make install to install the OpenPose system-wide. I highly recommend you to look at a similar question here.

Let me know the outcome, please!

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Hi @magi-dalmau

Since I couldn't hear from you, I am going to close the issue. Please feel free to open and comment if the issue persists.

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Hi @kledom

Thank you very much for the information.

I checked the deployment and release notes of OpenPose 1.6.0 and found that OpenPose has modified the code to get rid of OpenCV in its headers.

OpenPose 1.6.0 has introduced many new preprocessors. The preprocessor OP_CV2OPCONSTMAT is important for ros_openpose. I believe that if we change this line with the following code, we should be good to go again-

datumPtr->cvInputData = OP_CV2OPCONSTMAT(colorImage);

However, keep in mind that due to the COVID-19 pandemic, I cannot test the above workaround. I do not have access to my PC at the laboratory.

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Hi @kledom

Thank you very much.

For instance, op::check was replace with op::checkBool.

Noted it. I will make some workaround. For now, we should keep using OpenPose 1.5.1.

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