OpenCV: No such file or directory

[zzzKennYzzz]

Hello, a lot of problems arose when installing OpenCV on Ubuntu to work in QtCreator, but they were somehow solved and now the time has come to test this library in QtCreator. And here again the error, which I can no longer understand how to solve, maybe someone faced this problem? (screenshots of the problem are attached)

Perhaps Qt cannot access the files, but I can’t know for sure, I also attached screenshots of the folders (from 3 picture)

[JonB]

@zzzKennYzzz
Since you have the /.../opencv4/opencv2 directory on your INCLUDEPATH, remove the leading opencv4/opencv2/ from the #include <opencv4/opencv2/...> directives.

If that is not it, find out whether the file mentioned in the error message exists in that include directory or anywhere.

[zzzKennYzzz]

@JonB
Unfortunately it didn't help me. Maybe he is trying to immediately access the file in "core.hpp" without accessing the folder "core"?

[JoeCFD]

add all of them
INCLUDEPATH += /usr/local/include/opencv4/opencv2
DEPENDPATH += /usr/local/include/opencv4/opencv2

INCLUDEPATH += /usr/local/include/opencv4/opencv2/core
DEPENDPATH += /usr/local/include/opencv4/opencv2/core

INCLUDEPATH += /usr/local/include/opencv4/opencv2/highgui
DEPENDPATH += /usr/local/include/opencv4/opencv2/highgui

simply include header files in any cpp file
#include "core.hpp"

[zzzKennYzzz]

@JoeCFD
Doesn't work =(

[JoeCFD]

locate cvdef.h

[zzzKennYzzz]

@JoeCFD
It there
maybe access problems?

[JoeCFD]

@JoeCFD said in OpenCV: No such file or directory:

add all of them
INCLUDEPATH += /usr/local/include/opencv4/opencv2
DEPENDPATH += /usr/local/include/opencv4/opencv2

add all of them
INCLUDEPATH += /usr/local/include/opencv4
DEPENDPATH += /usr/local/include/opencv4

[zzzKennYzzz]

@JoeCFD
Thank you! But now the new problem

however, they are there

[JoeCFD]

from command line:
locate libopencv_contrib or locate opencv_contrib
to find where it is located. Then in your pro file add
LIBS += -Lpathtoopencv_contrib -lopencv_contrib

[SGaist]

Hi,

Using:

CONFIG += link_pkgconfig
PKGCONFIG += opencv

Should be enough