how to add opencv to a gui QT application? -

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i created new widget gui application in qt . , in order using opencv , added includepath , libs projects following :

qt       += core gui  greaterthan(qt_major_version, 4): qt += widgets  target = testqt4 template = app   sources += main.cpp\         widget.cpp  includepath += c:/opencv/build/include  libs += -lc:\opencv\build\x64\vc12\lib -lopencv_world310d  headers  += widget.h  forms    += widget.ui

and included desired opencv headers following :

#ifndef widget_h #define widget_h  #include <qwidget> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> ....

but when builded project encountered error :

enter image description here

can me fix error ? thank .

are using qt creator?

it not update makefile once changed .pro file.

right click on project folder in projects view , click "run qmake" should fix it.


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