Including OpenCv header files in Ubuntu

Question

I first included the highgui.hpp file as

#include "opencv2/highgui/highgui.hpp"

This gave the error " No such file or directory".

When I replaced this with

#include "/host/opencv/build/include/opencv2/highgui/highgui.hpp"

This error was solved. But I got another error,

In file included from opencvtest.cpp:1:0: /host/opencv/build/include/opencv2/highgui/highgui.hpp:46:33: fatal error: opencv2/core/core.hpp: No such file or directory

This means that now the core.hpp file included in highgui.hpp cant be located.

I need a way so that it can automatically look for included files in the "include" folder. How to do this in ubuntu?? I have used Microsoft Visual Studio previously, where this folder is added in project properties, in additional libraries.

Add command that you are using to compile code

Alex
– Alex

2013-10-16 07:55:04 +00:00
Commented Oct 16, 2013 at 7:55 — Alex
– Alex, Commented Oct 16, 2013 at 7:55

Alex · Accepted Answer · 2013-10-16 07:53:56Z

2

You need to add the following flag to compiler command:

-I<here_path_to_opencv_headers_root>

answered Oct 16, 2013 at 7:53

Alex

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Franck Charpentier · Accepted Answer · 2013-10-16 10:50:34Z

1

Are you finish the installation of OpenCV ? Normaly if the command "sudo make install" are passed the headers are in the include path If you dont't install OpenCV on your system then add -Ihost/opencv/build/include/ at the command line of make . But the same problem will arise with lib when you have set th includes. The best solution is to follow the indication of http://docs.opencv.org/trunk/doc/tutorials/introduction/linux_install/linux_install.html and https://help.ubuntu.com/community/OpenCV

edited Oct 16, 2013 at 10:50

answered Oct 16, 2013 at 10:20

Franck Charpentier

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NiallJG · Accepted Answer · 2019-02-11 08:54:37Z

0

You can also use a tool called pkg-config to find the location of the header files and libraries you need, like so

 pkg-config --libs --cflags opencv

And you can include these in your compiler flags or build scripts with

 clang++  $(pkg-config --libs --cflags opencv)  -o main.cpp binary.app

answered Feb 11, 2019 at 8:54

NiallJG

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