Error when running the quickstart using Noetic

[natik-bw]

Interested in reopening issue #48 (comment), as the solution didn't resolve my error.

• I am using ros-noetic, with Opencv-4.5.5 (due to other project dependencies)
• Changing #include <opencv/cv.hpp>' to '#include <opencv2/opencv.hpp>' in optimiser.h. It didn't resolve the problem, since it caused the following error when executing catkin build`:
  

I was able to successfully build when I replaced `#include <opencv/cv.hpp>' to:

#include <opencv2/core/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/calib3d.hpp>

But then, I still got a runtime error when executing the quick start
roslaunch cam_lidar_calibration run_optimiser.launch import_samples:=true

*** logs ***
rosout-1-stdout.log
rosout.log
roslaunch-netanel-Precision-5560-26735.log
master.log

NOTE
I don't know if this is correct, but I used the calib_v2 branch, and there
cv::reduce(...) under optimiser.cpp here
was not commented out (all I had to do was replace CV_REDUCE_SUM by cv::REDUCE_SUM for proper compatibility), so I wasn't sure whether I missed an additional change I had to do.
It wasn't clear to me from @YHuniv 's instructions.

Originally posted by @natik-bw in #48 (comment)

[jclinton830]

Please update your local copy of the repo by checking out noetic_v2 and then doing a git pull. This was fixed recently.