Linking OpenCV to Qt Creator

Question

I\'m trying to use opencv 4 in QT creator, I\'m working on Mac but I can\'t be able to link the library, I always have a error like on picture 2.

ple

Answer 1

First of all be sure you installed OpenCV correctly and working fine. You can check OpenCV exist or not by:

pkg-config --modversion opencv

It depends how you installed OpenCV but linking OpenCV libraries and flags to Qt is simply like adding these two line to your .pro file:

INCLUDEPATH += /usr/local/include/opencv # depends on how you installed
LIBS += `pkg-config --cflags --libs opencv`

This tutorial is also very helpful.