Getting error in cv::imshow() - ASSERT: “false” in file qasciikey.cpp, line 501

问题

I am getting this error whenever I call cv::waitKey():

ASSERT: "false" in file qasciikey.cpp, line 501

I am not sure why I am getting this error. I am running on an Ubuntu Server 14.04 EC2 instance connected through MobaXterm on Windows. If I run all of the same code on a normal ubuntu machine, all works great.

This is the line where this happens:

char key = cvWaitKey(33);

回答1:

A workaround in MobaXterm is to uncheck "Unix-compatible keyboard" in X11 settings.

回答2:

Try this.

pip install qtconsole

I solve the problem.

回答3:

I am not trying to get the glory here but I think this deserves a proper answer.

As @George mentioned in the comment when my input was not from an English keyboard but used some other locale then this error occurs. I have seen other proposed reasons for this error but I guess this is a quite usual case since the error reports:

ASSERT: "false"

回答4:

This problem is come from mistakes my laptop battery very low and charge unstable after opencv run opencv window opened and closed quickly. THis problem solved must battery full charge.

来源：https://stackoverflow.com/questions/35837255/getting-error-in-cvimshow-assert-false-in-file-qasciikey-cpp-line-501