Using OpenCV in QTCreator (linking problem)

I have a problem with the linking simpliest test program in QTCreator:

CODE:

#include <QtCore/QCoreApplication>
#include <cv.h>

#include <highgui.h>
#include <cxcore.hpp>

using namespace cv;

int _tmain(int argc, _TCHAR* argv[])
{
    cv::Mat M(7,7,CV_32FC2,Scalar(1,3));
    return 0;
}

.pro file:

QT       -= gui
TARGET    = testopencv
开发者_如何学PythonCONFIG   += console
CONFIG   -= app_bundle
INCLUDEPATH += C:/OpenCV2_1/include/opencv
TEMPLATE = app

LIBS += C:/OpenCV2_1/lib/cxcore210d.lib \
    C:/OpenCV2_1/lib/cv210d.lib \
    C:/OpenCV2_1/lib/highgui210d.lib\
    C:/OpenCV2_1/lib/cvaux210d.lib
SOURCES += main.cpp

I've tried to use -L and -l like LIBS += -LC:/OpenCV2_1/lib -lcxcored

And in .pro file:

QMAKE_LIBDIR += C:/OpenCV2_1/lib/Debug

LIBS += -lcxcore210d \
-lcv210d \
-lhighgui210d 

The errors are like:

debug/main.o:C:\griskin\test\app\testopencv/../../../../OpenCV2_1/include/opencv/cxcore.hpp:97: undefined reference to cv::format(char const*, ...)'

Could anyone help me? Thanks!

In Visual Studio it works but I need it works in QTCreator..

---

Qt uses the MinGW compiler and linker. It will happily link OpenCV .libs when you use the C interface. However due to ABI issues, it will not link C++ modules.

You will have to either restrict yourself to the C interfaces only (i.e. no cv::Mat), or get OpenCV to compile with MinGw (or compile Qt in/with VS). Also, see this thread.

---

This is what my .pro file looks like

INCLUDEPATH += C:\\opencv\\release\\install\\include\

LIBS += -LC:\\opencv\\release\\install\\bin \
    -lopencv_core240 \
    -lopencv_highgui240 \
    -lopencv_imgproc240 \
    -lopencv_features2d240 \
    -lopencv_calib3d240 \

and replace

#include <cv.h>

with

#include <opencv/cv.h>

Above .pro file works perfect for me. I have used mingw to compile OpenCV and using mingw compiler tool chain in Qt.

---

It seems that QtCreator cannot locate lib files. Try specifying the include file and libs as follows.

INCLUDEPATH += C:/OpenCV2_1/build/include/

LIBS += C:/OpenCV2_1/build/gpu/x86/lib/cxcore210d.lib

you should refer to build folder if you're using pre-build version of opencv.

(I recommend pre-build version if you're not that familiar with opencv)