Qt+Opencv配置

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在Win7（32）位下：

1、版本：

    Qt版本：qt-opensource-windows-x86-android-5.5.1.exe

    链接地址：http://download.qt.io/archive/qt/5.5/5.5.1/

    OpenCV版本：OpenCV2.4.1

2、安装好Qt之后，将D:\Program Files\opencv\build\x86\vc10\bin,D:\qt\5.5\mingw492_32\bin的路径添加到Path中，在创建工程的时候，向工程     .pro文件中添加：

  INCLUDEPATH+="D:/Program Files/opencv/build/include" \

                "D:/Program Files/opencv/build/include/opencv" \

                 "D:/Program Files/opencv/build/include/opencv2"

   LIBS+= -L"D:/Program Files/opencv/build/x86/vc10/lib/" -lopencv_ml2411d -lopencv_calib3d2411d -lopencv_contrib2411d -lopencv_core2411d \

          -lopencv_features2d2411d -lopencv_flann2411d -lopencv_gpu2411d -lopencv_imgproc2411d -lopencv_legacy2411d -lopencv_objdetect2411d \

          -lopencv_ts2411d -lopencv_video2411d -lopencv_nonfree2411d -lopencv_ocl2411d -lopencv_photo2411d -lopencv_stitching2411d \

          -lopencv_superres2411d -lopencv_videostab2411d -lopencv_highgui2411d

  表达式的第一部分（-L...）：使链接器知道应该在哪个目录中查找库文件。双引号只在路径包含空格时才需要。

  表达式的第二部分（-l...）：告诉链接器链接哪些库，没有必要指定 .lib 扩展名。

3、main.cpp如下：

      #include<opencv2/highgui/highgui.hpp>

      #include<opencv2/imgproc/imgproc.hpp>

      using namespace cv;

      int main()

      {

        IplImage *src = cvLoadImage("Example1.png", -1);

        cvShowImage("src", src);

        cvWaitKey(0);

        cvReleaseImage(&src);

       return 0;

     }

   并把Example1.png图片拷贝到Debug目录下，可以正常打开图片，但是将main.cpp函数改成以下：

    #include<opencv2/highgui/highgui.hpp>

    #include<opencv2/imgproc/imgproc.hpp>

    using namespace cv;

    int main()

    {

      /* IplImage *src = cvLoadImage("Example1.png", -1);

        cvShowImage("src", src);

        cvWaitKey(0);

        cvReleaseImage(&src);*/

        Mat src = imread("Example1.png", 0);

        imshow("src", src);

        waitKey(0);

        return 0;

    }

   编译出现错误：    

debug/main.o: In function `main':

C:\Users\Administrator.AZU9F7UB7BS30XB\Desktop\test\build-55y-Desktop_Qt_5_5_1_MinGW_32bit-Debug/../55y/main.cpp:11: undefined reference to `cv::imread(std::string const&, int)'

C:\Users\Administrator.AZU9F7UB7BS30XB\Desktop\test\build-55y-Desktop_Qt_5_5_1_MinGW_32bit-Debug/../55y/main.cpp:12: undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'

C:\Users\Administrator.AZU9F7UB7BS30XB\Desktop\test\build-55y-Desktop_Qt_5_5_1_MinGW_32bit-Debug/../55y/main.cpp:12: undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'

C:\Users\Administrator.AZU9F7UB7BS30XB\Desktop\test\build-55y-Desktop_Qt_5_5_1_MinGW_32bit-Debug/../55y/main.cpp:13: undefined reference to `cv::waitKey(int)'

debug/main.o: In function `ZN2cv3MatD1Ev':

D:/Program Files/opencv/build/include/opencv2/core/mat.hpp:278: undefined reference to `cv::fastFree(void*)'

debug/main.o: In function `ZN2cv3Mat7releaseEv':

D:/Program Files/opencv/build/include/opencv2/core/mat.hpp:367: undefined reference to `cv::Mat::deallocate()'

collect2.exe: error: ld returned 1 exit status

Makefile.Debug:77: recipe for target 'debug\55y.exe' failed

mingw32-make[1]: *** [debug\55y.exe] Error 1

mingw32-make[1]: Leaving directory 'C:/Users/Administrator.AZU9F7UB7BS30XB/Desktop/test/build-55y-Desktop_Qt_5_5_1_MinGW_32bit-Debug'

makefile:34: recipe for target 'debug' failed

mingw32-make: *** [debug] Error 2

14:42:15: 进程"D:\qt\Tools\mingw492_32\bin\mingw32-make.exe"退出，退出代码 2 。

Error while building/deploying project 55y (kit: Desktop Qt 5.5.1 MinGW 32bit)

When executing step "Make"

说明编译器找不到lib库文件，opencv2中新添加函数和结构不能用，例如：Mat结构，imread函数，VideoCapture结构等;