C++ Windows 上的 Eclipse 上的 OpenCV

OpenCV on eclipse on windows

提问by Mohamed Wagdy Khorshid

I'm trying to install opencv on windows, here are my steps:

我正在尝试在 Windows 上安装 opencv，这是我的步骤：

• downloaded opencv 2.4.3 from website
• run the exe, extracted the folder in the same path
• opened eclipse (with MinGW previously set and configured)
• created new project XYZ
• added new folder "src"
• added new class "main.cpp"

• added the following code:

  hash include <cv.h>
  hash include <highgui.h>

  using namespace cv;
  int main(int argc, char** argv) {
  
  Mat image;
  image = imread(argv[1], 1);
  
  if (argc != 2 || !image.data) {
      printf("No image data \n");
      return -1;
  }
  
  namedWindow("Display Image", CV_WINDOW_AUTOSIZE);
  imshow("Display Image", image);
  
  waitKey(0);
  
  return 0;
  }
  

• added the two paths

  • "E:\Sources\opencv\build\include"
  • "E:\Sources\opencv\build\include\opencv"
• got the compilation error "Symbol 'cv' could not be resolved"

• 从网站下载了 opencv 2.4.3
• 运行exe，解压同路径下的文件夹
• 打开 eclipse（之前设置和配置了 MinGW）
• 创建了新项目 XYZ
• 添加了新文件夹“src”
• 添加了新类“main.cpp”

• 添加了以下代码：

  散列包含 <cv.h>
  散列包含 <highgui.h>

  using namespace cv;
  int main(int argc, char** argv) {
  
  Mat image;
  image = imread(argv[1], 1);
  
  if (argc != 2 || !image.data) {
      printf("No image data \n");
      return -1;
  }
  
  namedWindow("Display Image", CV_WINDOW_AUTOSIZE);
  imshow("Display Image", image);
  
  waitKey(0);
  
  return 0;
  }
  

• 添加了两条路径

  • "E:\Sources\opencv\build\include"
  • "E:\Sources\opencv\build\include\opencv"
• 得到编译错误 "Symbol 'cv' could not be resolved"

Please advice if any step is missing

如有遗漏请指教

回答by lastjeef

you gonna need the latest stable version of openCV 2.4.3 .

你需要最新的稳定版 openCV 2.4.3 。

Eclipse Juno ! (Eclipse IDE for C/C++ Developers ) And MinGW - Minimalist GNU for Windows

日食朱诺！（适用于 C/C++ 开发人员的 Eclipse IDE）和 MinGW - 适用于 Windows 的极简主义 GNU

we will ignore x86/64 choice, since we gonna work with a 32 compiler / and 32 openCV build, even though the system is a 64 one !

我们将忽略 x86/64 选择，因为我们将使用 32 位编译器和 32 位 openCV 构建，即使系统是 64 位！

Step 1 : Download and Install

第 1 步：下载并安装

Eclipse

蚀

Download Eclipse from and decompress the archive . ( I assumed that you already have JRE on your computer , if not ! download and install it ) .

从 Eclipse 下载并解压缩存档。（我假设您的计算机上已经有 JRE，如果没有！下载并安装它）。

MinGW

明威

Download MinGW . the installer will lead you through the process ! you might have to add the bin directory to the path ! (Default path : C/MinGW/bin )

下载 MinGW 。安装程序将引导您完成整个过程！您可能必须将 bin 目录添加到路径中！（默认路径： C/MinGW/bin ）

OpenCV

OpenCV

Download openCV exe from the link , extract the files (in the C:/ directory in this tutorial ) . Make sure you have the file structure below .

从链接下载 openCV exe，解压文件（在本教程的 C:/ 目录中）。确保您具有以下文件结构。

don't forget to add the bin directory => Path !

不要忘记添加 bin 目录 => Path ！

As I mentioned earlier ! I'll use x86 build even if i have a 64 OS to avoid compiler problems and to keep this tutorial open to x86 OS users !

正如我之前提到的！即使我有 64 位操作系统，我也会使用 x86 构建以避免编译器问题并使本教程对 x86 操作系统用户开放！

Step 2 : Create and Configure

第 2 步：创建和配置

• Open the Eclipse IDE !
• Create a new C++ project : File > New > C++ Project
• Choose a Hello Word Project to have a pre structured one ! Don't forget to select the MinGW toolchains

• 打开 Eclipse IDE！
• 创建一个新的 C++ 项目：文件 > 新建 > C++ 项目
• 选择一个 Hello Word 项目以获得一个预先结构化的项目！不要忘记选择 MinGW 工具链

Click Finish and let's get to work !

单击完成，让我们开始工作吧！

Now that you have you first Hello word project ! replace the Code in the Soure file .cpp by the code below

现在您有了第一个 Hello word 项目！用下面的代码替换 Soure 文件 .cpp 中的代码

///////////////CODE///////////

///////////////代码///////////

#include "opencv2/highgui/highgui.hpp"
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
  Mat im = imread(argc == 2 ? argv[1] : "lenna.png", 1);
  if (im.empty())
  {
    cout << "Cannot open image!" << endl;
    return -1;
  }
  imshow("image", im);
  waitKey(0);
  return 0;
}

///////////////CODE///////////

///////////////代码///////////

Obviously there are multiple errors on the code , yes ! we have to link the libraries !

显然代码中有多个错误，是的！我们必须链接库！

Now go to Properties >> C/C++ Build >> Settings on the Tool Setting tab >> GCC C++ Compiler >> Includes and include opencv path ! [opencvDir\build\include]

现在转到 Properties >> C/C++ Build >> Settings on the Tool Setting tab >> GCC C++ Compiler >> Includes and include opencv path ！[opencvDir\build\include]

Now scroll to MinGW C++ Linker >> Libraries and add the Library search path [opencvDIR\build\x86\mingw\lib]

现在滚动到 MinGW C++ Linker >> Libraries 并添加库搜索路径 [opencvDIR\build\x86\mingw\lib]

in the Libraries part ! we add as much librarie as we need for the project ! here I added 4 libraries just for tutorial sake even if well need only the highgui one for our test code to work ! The libraries names can be found on the [opencvDIR\build\x86\mingw\lib] Example ! for libopencv_video243.dll.a wee add opencv_video243 in the linker !

在图书馆部分！我们为项目添加了尽可能多的库！在这里我添加了 4 个库只是为了教程，即使我们的测试代码只需要 highgui 一个！库名称可以在 [opencvDIR\build\x86\mingw\lib] 示例中找到！对于 libopencv_video243.dll.a wee 在链接器中添加 opencv_video243 ！

click OK !

单击确定！

Now we can build our first project ! You figured that you have to add a picture to the project as implied in the source code "lenna.png" Use lenna for good luck

现在我们可以构建我们的第一个项目了！你认为你必须像源代码“lenna.png”中暗示的那样向项目添加图片使用lenna祝你好运

Build and Run the project ! If you see the beautiful lady :) Congrats :)

构建并运行项目！如果你看到美丽的女士:) 恭喜:)

have a look here for snapshots! opencveclipse-on-windows

看看这里的快照！ opencveclipse-on-windows

回答by Tobias Hermann

cv.h is for the old C API. To use the Cpp API try the following:

cv.h 适用于旧的 C API。要使用 Cpp API，请尝试以下操作：

#include <opencv2/opencv.hpp>