Question

我想要运行一个简单的OpenCV代码，但不幸的是我遇到了undefined reference错误。我真的不知道该怎么做。这是我试图让它运行的代码

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main(int argc, char** argv) {

    Mat image;

    image = imread(argv[1], 1);
    //...
    return 0;
}

这是日食输出：基本上它说：undefined reference to cv::imread(cv::String const&, int)'

完整的错误消息是：

g++ -L/usr/local/lib -o "TestOpenCV"  ./src/TestOpenCV.o   -lopencv_core -lopencv_highgui
./src/TestOpenCV.o: In function `main':
/media/cip/Media/workspace/OpenCV/TestOpenCV/Debug/../src/TestOpenCV.cpp:21: undefined reference to cv::imread(cv::String const&, int) collect2: error: ld returned 1 exit status make: *** [TestOpenCV] Error 1

pkg-config opencv --libs的列表输出如下所示：

/usr/local/lib/libopencv_calib3d.so 
/usr/local/lib/libopencv_core.so 
/usr/local/lib/libopencv_features2d.so 
/usr/local/lib/libopencv_flann.so 
/usr/local/lib/libopencv_highgui.so
/usr/local/lib/libopencv_imgcodecs.so 
/usr/local/lib/libopencv_imgproc.so 
/usr/local/lib/libopencv_ml.so 
/usr/local/lib/libopencv_objdetect.so 
/usr/local/lib/libopencv_photo.so 
/usr/local/lib/libopencv_shape.so 
/usr/local/lib/libopencv_stitching.so 
/usr/local/lib/libopencv_superres.so 
/usr/local/lib/libopencv_ts.a 
/usr/local/lib/libopencv_video.so 
/usr/local/lib/libopencv_videoio.so 
/usr/local/lib/libopencv_videostab.so 
/usr/local/lib/libopencv_viz.so

Answer 1

未定义的引用错误引用“无效的lib路径”。确保输入有效的lib路径：他们应该有扩展名“.lib”或“.a” 希望它有所帮助。

Answer 2

已经similar question了。尝试添加

-lopencv_imgcodecs

到链接器标志列表。

由于未定义的引用而无法编译？

2 个答案: