Installing denseflow compiles with the following error./home/m/src/denseflow/src/denseflow_gpu.cpp:2:10: fatal error: opencv2/cudaarithm.hpp: No such file or directory
#include “opencv2/cudaarithm.hpp”
where the keywords are
/home/m/src/denseflow/src/denseflow_gpu.cpp
cudaarithm.hpp
The solution is as follows.
1、Find the path where cudaarithm.hpp is located

sudo find/-name "cudaarithm.hpp"

A path similar to:

/home/m/src/opencv_contrib/modules/cudaarithm/include/opencv2/cudaarithm.hpp
/home/m/include/opencv4/opencv2/cudaarithm.hpp
............
..............

Then fill the absolute path into denseflow_ Gpu.cpp replaces relative path

#You have to fill in the absolute paths, and our paths may be different, you have to follow your own
sudo vim /home/m/src/denseflow/src/denseflow_gpu.cpp

Before replacing
#include “opencv2/cudaarithm.hpp”
After replacement
#include “/home/m/include/opencv4/opencv2/cudaarithm.hpp”
Compile again, the problem is solved.