Error: Assertion failed (_dst.fixedType()) in cv::convertPointsHomogeneous,

[amarnathreddy0201]

Hi Sir,
I run your'e example provided in Git, it thrown error.

What it mean:

OpenCV(4.5.5) Error: Assertion failed (_dst.fixedType()) in cv::convertPointsHomogeneous, file C:\build\master_winpack-build-win64-vc15\opencv\modules\calib3d\src\fundam.cpp, line 1202

https://github.com/daviddoria/Examples/blob/master/c%2B%2B/OpenCV/ProjectPoints/ProjectPoints.cxx

[daviddoria]

My guess is you're using a different version of OpenCV that was used when this was written (over 10 years ago!!). If you get it to work I'd be happy to accept a pull request, but unfortunately I won't be able to debug it for you.