error: undefined reference to `cv::imread(std::string const&, int)'
23,787
See output of pkg-config opencv --libs
to find out what libraries you're missing, then add them to your config.
For me, the full list of libraries is
/usr/lib64/libopencv_calib3d.so.2.4.8
/usr/lib64/libopencv_contrib.so.2.4.8
/usr/lib64/libopencv_core.so.2.4.8
/usr/lib64/libopencv_features2d.so.2.4.8
/usr/lib64/libopencv_flann.so.2.4.8
/usr/lib64/libopencv_gpu.so.2.4.8
/usr/lib64/libopencv_highgui.so.2.4.8
/usr/lib64/libopencv_imgproc.so.2.4.8
/usr/lib64/libopencv_legacy.so.2.4.8
/usr/lib64/libopencv_ml.so.2.4.8
/usr/lib64/libopencv_nonfree.so.2.4.8 # you don't have this one
/usr/lib64/libopencv_objdetect.so.2.4.8
/usr/lib64/libopencv_photo.so.2.4.8 # this one
/usr/lib64/libopencv_stitching.so.2.4.8 # this one
/usr/lib64/libopencv_superres.so.2.4.8 # and this one
/usr/lib64/libopencv_ts.a
/usr/lib64/libopencv_video.so.2.4.8
Comments
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Moonlight over 2 years
I'm new to Qt and I have a project that needs to configure OpenCV in Qt , I tried to run a simple code in Qt but I got this error "undefined reference to
cv::imread(std::string const&, int)
" and here is my code...#include "opencv2/imgproc/imgproc.hpp" #include "opencv2/highgui/highgui.hpp" using namespace cv; int main(){ Mat src,gray; src=imread("C:/Users/user/Desktop/wood-pattern.png",1); imshow("gg",src); cvWaitKey(0); return 0; }
and my source.pro is
#------------------------------------------------- # # Project created by QtCreator 2014-08-24T20:38:56 # #------------------------------------------------- INCLUDEPATH += C:\opencv\opencv2.4.9\build\include\ CONFIG(release,debug|release) { LIBS += C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_calib3d249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_contrib249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_core249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_features2d249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_flann249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_gpu249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_highgui249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_imgproc249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_legacy249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_ml249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_objdetect249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_ts249.lib \ C:\opencv\opencv2.4.9\build\x86\vc11\lib\opencv_video249.lib } CONFIG(debug,debug|release) { LIBS += C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_calib3d249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_contrib249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_core249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_features2d249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_flann249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_gpu249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_highgui249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_imgproc249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_legacy249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_ml249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_objdetect249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_ts249.lib \ C:\opencv\opencv2.4.9\build\x64\vc11\lib\opencv_video249.lib \ } QT += core QT -= gui TARGET = Source CONFIG += console CONFIG -= app_bundle TEMPLATE = app SOURCES += main.cpp
I saw all the answers about but they didn't work. my Qt is 32bit and my Windows is 64bit. I think my configuration is wrong. I followed many tutorial but they weren't for OpenCV 2.4.9 so please help me ...
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Moonlight almost 10 yearsactually my code just need highgui and imgpro library.Is it important that my windows is 64bit and qt is 32bit ? what should I exactly write in source.pro? should I add dll.a libs?
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Alexey Shmalko almost 10 yearsAs far as you compile in 32, your libraries have to be 32 bits, too