Wiseguy
Re: Build Opencv 3.2 code in Qt Creator4.3.1 with MSVC2015 64bit compiler .
You are using the wrong include flag.
You are using -L (which is for search library directory).
You should use -I (that is a capital i)
INCLUDEPATH += -I"C:\\.......\\prebuilt\\include\\opencv2"
And vice versa for the libraries:
LIBS += -L"C:\\........ \\prebuilt\x64\vc14\lib" <<--- -L instead of -I
LIBS += -lopencv_world320.lib <<--- note the changes, you have to add a -l (that is a lower case L) and I think you need to add the *.lib extension too.
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Guru
Re: Build Opencv 3.2 code in Qt Creator4.3.1 with MSVC2015 64bit compiler .
To add to what high_flyer said, if this is how you are including the opencv2 header files, then your -I directive needs to end with the "include" path, not "include\\opencv2".#include <opencv2/imgproc.hpp> in mainWindow.h
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