linux cmake配合opencv2.4.13使用

C++调用opencv

1. 建立main.cpp, 代码如下：

   #include 
   #include 
   #include 
   using namespace cv;
   using namespace std;
   
   int main( )
   {
       string path = "lena.jpg";
       Mat image;
       image = imread(path);
   
       if ( !image.data )
       {
           printf("No image data \n");
           return -1;
       }
       namedWindow("Display Image", WINDOW_AUTOSIZE );
       imshow("Display Image", image);
   
       waitKey(0);
   
       return 0;
   }
   

2. 建立CMakeLists 文件
   文件内容如下：

   cmake_minimum_required(VERSION 2.8)
   
   project( demo )
   
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++0x")  
   
   find_package( OpenCV REQUIRED )
   
   add_executable( demo main.cpp )
   
   target_link_libraries( demo ${OpenCV_LIBS} )
   

3. 编译运行

    cmake .
    make 
    ./demo
   

4. 运行效果
   

---

C++ opencv 第三方库libxml2(读写xml文件为例)

CMakeLists.txt 文件编写：

    ```
    cmake_minimum_required(VERSION 2.6)

    project(temperaturedetection1027)


    set (CMAKE_INCLUDE_CURRENT_DIR ON)

    if(COMMAND cmake_policy)
          cmake_policy(SET CMP0003 NEW)
    endif(COMMAND cmake_policy)

    FIND_PACKAGE(OpenCV REQUIRED)


    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++0x")  

    set(SOURCE_FILES main.cpp  write_xml.h ) 


    include_directories(/usr/include/libxml2)

    add_executable(TPD ${SOURCE_FILES})

    TARGET_LINK_LIBRARIES(TPD ${OpenCV_LIBS} xml2 )
    ```