configure opencv with Qt in linux

edit

i had installed Qt with QtAssistant-QtCreator-QtSetting-QtLinguist from ubuntu-software-center

and i added this lines to my project .pro file :

INCLUDEPATH += /usr/include/opencv INCLUDEPATH += /usr/include/opencv2

LIBS += -L/usr/lib -lopencv_core -lopencv_highgui and etc

but i doesnt work still

also i have 4 of each library in that direction . for example : libopencv_imgproc.a libopencv_imgproc.so libopencv_imgproc.so.2.3 libopencv_imgproc.2.3.1

i must write which one in next of LIBS+= ....... ?

your INCLUDEPATH and LIBS-path actually look fine (altough at my system they are under /usr/local/lib and /usr/local/include). To answer your question: the '-l' before 'opencv_core' (and the others) will result in libopencv_core.so , thus, this library will be used, however libopencv_core.so is just a symbolic link to libopencv_imgproc.so.2.3 which again is only a symbolic link to libopencv_imgproc.2.3.1. This is the way to go and makes it easy to upgrade to a newer opencv-version without updating your projectfile. If you are still stuck with your problem, please update your question with your .pro-file.