我如何正确地将OpenCV库链接到Windows上的Eclipse？ [英] How can I correctly link OpenCV libraries to Eclipse on Windows?

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本文介绍了我如何正确地将OpenCV库链接到Windows上的Eclipse？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在过去的几个小时里，我一直在尝试让一个基本的OpenCV程序在我的Eclipse Mars IDE中工作。该程序由以下main.cpp组成： 

  #include< opencv2 / core / core.hpp> 
 #include< opencv2 / highgui / highgui.hpp> 
 #include< iostream> 
 
使用namespace cv; 
使用namespace std; 
 
 int main（int argc，char ** argv）
 {
 if（argc！= 2）
 {
 cout <<<用法：display_image ImageToLoadAndDisplay<< ENDL; 
返回-1; 
} 
 
 Mat图像; 
 image = imread（argv [1]，CV_LOAD_IMAGE_COLOR）; //读取文件
 
 if（！image.data）//检查无效输入
 {
 cout<< 无法打开或找到图片<< std :: endl; 
返回-1; 
} 
 
 namedWindow（Display window，WINDOW_AUTOSIZE）; //创建一个窗口进行显示。 
 imshow（显示窗口，图像）; //在里面显示我们的图像。 
 
 waitKey（0）; //等待窗口中的按键
返回0; 
}

到目前为止我所做的一切：


  1. 安装了MinGW（在E：\NVPACK\MinGW中），并将其bin文件路径添加到我的环境变量中。
  2. 在E：\opencv上安装OpenCV 2.4.12。在安装的文件夹里面是build和sources文件夹。 使用MinGW GCC Toolchain创建了一个新的Eclipse C ++项目。
    3. 在工具设置（工程属性 - > C / C ++构建 - >设置）中，我将OpenCV库包含在GCC C ++编译器中作为E ：\opencv\build\include

  3. 在MinGW C ++链接器中添加的工具设置中，所有库（例如opencv_core2412，opencv_highgui2412，opencv_imgproc2412 ），并将库搜索路径设置为E：\\\\\\\\\\\\\\\\\\\' PE Windows Parser。

构建项目所有的OpenCV函数都会得到未定义的引用错误，例如：

 对`cv :: imread（std :: string const&; int）'的未定义引用main.cpp第17行C / C ++问题
未定义引用`cv :: _ InputArray :: _ InputArray（cv :: Mat const&）'main.cpp line 26 C / C ++ Problem

奇怪的是，声明Mat图不会给出错误，并将鼠标悬停在它上面c或者直接显示OpenCV的Mat文档。



谷歌搜索问题我发现由于某种原因，我可能需要使用CMake来构建我自己的库文件（步骤5中使用的文件）。所以在安装CMake gui后，我使用E：\opencv\sources作为源目录，并创建了一个新的目录E：\\\\\\\\\\\\\\\\\\'作为我的编译目录。我使用Eclipse CDT4 -MinGW Makefiles生成器来配置文件。在按下Configure之后，我将为我的g ++编译器（类似于我的gcc编译器）收到以下错误： 

  CMake错误CMakeLists.txt：71（project）：
 CMAKE_CXX_COMPILER：
 
 E：/ NVPACK / MinGW / bin / mingw32-g ++ 
 
不是完整路径到现有的编译器工具。 
 
通过将环境
变量CXX或CMake缓存项CMAKE_CXX_COMPILER设置为完整路径
给编译器或编译器，告诉CMake在哪里可以找到编译器名称，如果它在PATH中。

然而编译器识别出：CXX编译器标识符是GNU 4.8.1和C编译器标识是GNU 4.8.1



任何有关如何在Windows 7上的Eclipse Mars中正确设置OpenCV 2.4.12库的帮助将非常感谢！ / p>

解决方案

嗯，我希望这已经够详细了！首先，一大杯咖啡会有帮助！



让我们开始吧：

要求：

b

  • 从 github回购下载OpenCV源代码（将它解压到一个我们将命名为 opencv_src_folder 的文件夹）

  • 下载并安装MinGW系统路径）

  • 下载并安装 CMake



    • 步骤： >打开CMake-gui




    • 将src文件夹设置为 opencv_src_folder

    • 将build文件夹设置为 opencv_src_folder / Mingw_build /

    • 点击 configure 然后选择 Eclipse CDT4 - MinGW MakeFile 然后选择下一步。
    • 如果配置成功，点击 / code>。


  • 打开命令行（Windows + R）


    • $ cd opencv_src_folder / Mingw_build /

    • $ mingw32- make ：
      这将使用MinGW创建openCV，所以请等待它完成！

    • 现在，让我们安装$ mingw32 -make install
      这将在opencv_src_folder / Mingw_build / install /
      • 中安装cmake

    • 将 opencv_src_folder / Mingw_build / install / bin / 添加到您的系统路径&

    • Eclipse配置：




      • 转到Eclipse CDT IDE，使用示例OpenCV代码创建一个C ++程序。
      • 转到Project> Properties> C / C ++ Build> Settings> GCC C ++ Compiler>包含并添加源OpenCV文件夹打开项目>属性> C / C ++编译>设置> MinGW C ++链接器>库，并添加到库（-l）中。 ）分别：（不要忘记更改245到哪个号码，他们使用的lib文件）
        opencv_calib3d245 opencv_contrib245 opencv_core245 opencv_features2d245 opencv_flann245 opencv_gpu245 opencv_highgui245 opencv_imgproc245 opencv_legacy245 opencv_ml245 opencv_nonfree245 opencv_objdetect245
        opencv_photo245 opencv_stitching245 opencv_video245 opencv_videostab245

        • （-L）。



    测试：

    您可以使用以下代码作为测试： 

      #include< opencv2 / core / core.hpp> 
     #include< opencv2 / highgui / highgui.hpp> 
     #include< iostream> 
     
    使用namespace cv; 
    使用namespace std; 
     
     int main（int argc，char ** argv）
     {
     if（argc！= 2）
     {
     cout <<<用法：display_image ImageToLoadAndDisplay<< ENDL; 
    返回-1; 
    } 
     
     Mat图像; 
     image = imread（argv [1]，CV_LOAD_IMAGE_COLOR）; //读取文件
     
     if（！image.data）//检查无效输入
     {
     cout<< 无法打开或找到图片<< std :: endl; 
    返回-1; 
    } 
     
     namedWindow（Display window，WINDOW_AUTOSIZE）; //创建一个窗口进行显示。 
     imshow（显示窗口，图像）; //在里面显示我们的图像。 
     
     waitKey（0）; //等待窗口中的按键
    返回0; 
    }

    最后建立您的项目！



    希望有所帮助！

    For the last couple of hours I have been trying to get a basic OpenCV program to work in my Eclipse Mars IDE. The program consists of the following main.cpp:

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

using namespace cv;
using namespace std;

int main( int argc, char** argv )
{
  if( argc != 2)
  {
   cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
   return -1;
  } 

  Mat image;
  image = imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file

  if(! image.data )                              // Check for invalid input
  {
    cout <<  "Could not open or find the image" << std::endl ;
    return -1;
  }

  namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
  imshow( "Display window", image );                   // Show our image inside it.

  waitKey(0);                                          // Wait for a keystroke in the window
  return 0;
}

    What I have done up till now:

    1. Installed MinGW (in E:\NVPACK\MinGW) and added its bin file path to my Environmental Variables.

    2. Installed OpenCV 2.4.12 at E:\opencv. Inside the installed folder are the "build" and "sources" folder.

    3. Made a new Eclipse C++ project with the MinGW GCC Toolchain.

    4. Inside the Tool Settings (Project Properties --> C/C++ Build --> Settings) I included the OpenCV library in the GCC C++ Compiler as "E:\opencv\build\include"

    5. Inside the Tool Settings I added in the MinGW C++ Linker all the libraries (i.e. opencv_core2412, opencv_highgui2412, opencv_imgproc2412) and set the Library search path to "E:\opencv\build\x86\vc12\lib"

    6. Set my Binary parser to PE Windows Parser.

    Building the project all the OpenCV functions get undefined references errors, such as:

    undefined reference to `cv::imread(std::string const&, int)'    main.cpp    line 17 C/C++ Problem
undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'   main.cpp    line 26 C/C++ Problem

    Weird enough, declaring Mat image does not give an error and holding my mouse over it correctly displays the OpenCV's Mat documentation.

    Googling the problem I found that for some reason I might need to use CMake to build my own library files (the ones used in step 5). So after installing CMake gui, I used E:\opencv\sources as the source directory and made a new directory E:\opencv\MinGW as my build directory. I used "Eclipse CDT4 -MinGW Makefiles" generator to Configure the files. After pressing Configure, I will receive the following error for my g++ compiler (a similar one for my gcc compiler):

    CMake Error at CMakeLists.txt:71 (project):
The CMAKE_CXX_COMPILER:

E:/NVPACK/MinGW/bin/mingw32-g++

is not a full path to an existing compiler tool.

Tell CMake where to find the compiler by setting either the environment
variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.

    The compilers are however identified: "The CXX compiler identification is GNU 4.8.1" and "The C compiler identification is GNU 4.8.1"

    Any help on how to correctly set up the OpenCV 2.4.12 libraries in Eclipse Mars on Windows 7 would be very much appreciated!

    解决方案

    Well, I hope this is detailed enough ! First of all, a big cup of coffee will help !

    Let's get started :

    Requirements :

    • Download OpenCV source from github repo (extract it to a folder we will name opencv_src_folder)
    • Download and install MinGW (also add /bin folder to system path)
    • Download and install CMake

    Steps :

    • Open CMake-gui

      • set src folder as opencv_src_folder
      • set build folder as opencv_src_folder/Mingw_build/
      • Hit configure and choose Eclipse CDT4 - MinGW MakeFile then next.
      • if configure successful , hit generate.

    • Open a command line (Windows + R)

      • $ cd opencv_src_folder/Mingw_build/
      • $ mingw32-make : this will make openCV using MinGW, so wait until it's finished !
      • now, let's install it $ mingw32-make install this will install cmake in opencv_src_folder/Mingw_build/install/

    • Add opencv_src_folder/Mingw_build/install/bin/ to your system path & restart session.

    • Eclipse Configuration :

      • Go to the Eclipse CDT IDE, create a C++ program using the sample OpenCV code.
      • Go to Project > Properties > C/C++ Build > Settings > GCC C++ Compiler > Includes, and add the source OpenCV folder "opencv_src_folder/Mingw_build/install/include/"

      • Go to Project > Properties > C/C++ Build > Settings > MinGW C++ Linker > Libraries, and add to the Libraries (-l) separately : (Don't forget to change the 245 to whichever number they use for the lib files) opencv_calib3d245 opencv_contrib245 opencv_core245 opencv_features2d245 opencv_flann245 opencv_gpu245 opencv_highgui245 opencv_imgproc245 opencv_legacy245 opencv_ml245 opencv_nonfree245 opencv_objdetect245 opencv_photo245 opencv_stitching245 opencv_video245 opencv_videostab245

      • Add the built OpenCV library folder, opencv_src_folder/Mingw_build/install/lib to Library search path (-L).

    Testing :

    you can use the following code as a test : 

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

using namespace cv;
using namespace std;

int main( int argc, char** argv )
{
  if( argc != 2)
  {
   cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
   return -1;
  }

  Mat image;
  image = imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file

  if(! image.data )                              // Check for invalid input
  {
    cout <<  "Could not open or find the image" << std::endl ;
    return -1;
  }

  namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
  imshow( "Display window", image );                   // Show our image inside it.

  waitKey(0);                                          // Wait for a keystroke in the window
  return 0;
}

    And last build your project !

    Hope that helps !

    这篇关于我如何正确地将OpenCV库链接到Windows上的Eclipse？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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