OpenCV 2.4.6 with QT 5.1.0 Errors - qt

Question

I am trying to get OpenCv2.4.6 to work with QT5.1.0
I've followed this Guide so far Qt creator 5.0.1 with OpenCv 2.3.4 on windows
Unfortunatly after finishing trying out the sample Application(Display an Image using OpenCv in the QtCreator I get these Errors:
[Project-Path]\main.o:-1: In function `main':
[Project-Path]\main.cpp:8: error: undefined reference to `cv::imread(std::string const&, int)'
[Project-Path]\main.cpp:9: error: undefined reference to `cv::namedWindow(std::string const&, int)'
[Project-Path]\main.cpp:10: error: undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
[Project-Path]\main.cpp:10: error: undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
[Project-Path]\main.cpp:11: error: undefined reference to `cv::waitKey(int)'
[Project Build Path Desktop Debug]\debug\main.o:-1: In function `ZN2cv3MatD1Ev':
[OpenCV/Install/include]\opencv2\core\mat.hpp:278: error: undefined reference to `cv::fastFree(void*)'
[Project Build Path Desktop Debug]\debug\main.o:-1: In function `ZN2cv3Mat7releaseEv':
[OpenCV/Install/include]\opencv2\core\mat.hpp:367: error: undefined reference to `cv::Mat::deallocate()'
collect2.exe:-1: error: error: ld returned 1 exit status
the "[]" Paths are my formatting and supposed to help keep track .
main.cpp
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace cv;
int main() {
// read an image
Mat image = imread("img.jpg");
namedWindow("My Image");
imshow("My Image", image);
waitKey(5000);
return 1;
}
myFirstOpenCVProject.pro
QT += core
QT -= gui
TARGET = myFirstOpenCVProject
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += main.cpp
INCLUDEPATH += C:/qt/OpenCV246_bin/install/include
LIBS += -LC:/qt/OpenCV246_bin/install/lib/lopencv_core246.dll
LIBS += -LC:/qt/OpenCV246_bin/install/lib/lopencv_highgui246.dll
LIBS += -LC:/qt/OpenCV246_bin/install/lib/lopencv_imgproc246.dll
LIBS += -LC:/qt/OpenCV246_bin/install/lib/lopencv_features2d246.dll
LIBS += -LC:/qt/OpenCV246_bin/install/lib/lopencv_calib3d246.dll
Can you help me resolve this?
I can't find any solutions that apply to my case ...

Answer 1

-L is to add directories to the search path. The actual libs are added via -l. The correct line would be:
LIBS += -LC:/qt/OpenCV246_bin/install/lib -llopencv_core246 -llopencv_highgui246 ...

Answer 2

I think you are missing the static libs of opencv:
opencv_core246.lib
opencv_highgui246.lib
opencv_video246.lib
opencv_ml26d.lib
opencv_legacy246.lib
opencv_imgproc246.lib
opencv_whatever.lib
Don t know the pro commands very well. Maybe something like:
LIBS += -Lc:/blabla/opencv_imgproc246.lib