CLion配置opencv环境

工具准备

1.clion官网链接：clion
2.cmake官网链接：cmake
下载红框标记的压缩包，免安装。

3.mingw官网链接：mingw
安装红框标记下载免安装版本，解压可用。

4.opencv源码地址：opencv

安装clion+mingw+cmake

1.mingw安装：解压mingw压缩文件，并配置bin路径到环境变量（路径中不要有空格）
2.cmake安装：解压cmake压缩文件，并配置bin路径到环境变量（路径中不要有空格）
3.clion安装：clion安装教程。

编译opencv库

用clion打开opencv源码目录并对clion进行如下设置：

配置完成后，clion会自己更新工程的cmake配置，期间会报一些python的错误，无需理会，待cmake的配置刷新完后，点击build就可开始编译了，编译过程会报很多warning，无需理会。
重要：编译完后一定要install一次，不然后面会找不库。

编译中遇到的错误：
1.报" file too big”->在opencv的CmakeList.txt中添加：set(CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -Wunused-parameter -Wextra -Wreorder -Wa,-mbig-obj -O2”)

安装完成后，添加路径“xxx\cmake-build-debug\install\x64\mingw\bin”到环境变量(这里最好重启电脑一下，否则环境变量可能不生效)。

测试程序

1.修改测试程序CmakeList.txt如下：
cmake_minimum_required(VERSION 3.23)
project(OpencvTest)

set(CMAKE_CXX_STANDARD 14)

set(OpenCV_DIR xxx\cmake-build-debug\install)
find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(OpencvTestmain.cpp)

target_link_libraries(OpencvTest${OpenCV_LIBS})

2.main.cpp—官网实例，打开笔记本电脑自带摄像头，并按下空格抓怕。

#include <opencv2\opencv.hpp>
#include <iostream>
#include <opencv2/highgui/highgui_c.h>
#include <string>
using namespace cv;
using namespace std;

int main() {
    Mat src;
    // use default camera as video source
    VideoCapture cap(0);
    // check if we succeeded
    if (!cap.isOpened()) {
        cerr << "ERROR! Unable to open camera\n";
        return -1;
    }
    // get one frame from camera to know frame size and type
    cap >> src;
    // check if we succeeded
    if (src.empty()) {
        cerr << "ERROR! blank frame grabbed\n";
        return -1;
    }
    bool isColor = (src.type() == CV_8UC3);
    //--- INITIALIZE VIDEOWRITER
    VideoWriter writer;
    int codec = VideoWriter::fourcc('M', 'J', 'P', 'G');  // select desired codec (must be available at runtime)
    double fps = 25.0;                          // framerate of the created video stream
    string filename = "./live.avi";             // name of the output video file
    writer.open(filename, codec, fps, src.size(), isColor);
    // check if we succeeded
    if (!writer.isOpened()) {
        cerr << "Could not open the output video file for write\n";
        return -1;
    }
    //--- GRAB AND WRITE LOOP
    cout << "Writing videofile: " << filename << endl
         << "Press any key to terminate" << endl;
    unsigned int index = 0;
    for (;;) {
        // check if we succeeded
        if (!cap.read(src)) {
            cerr << "ERROR! blank frame grabbed\n";
            break;
        }
        // encode the frame into the videofile stream
        writer.write(src);
        // show live and wait for a key with timeout long enough to show images
        imshow("Live", src);
        //if (waitKey(5) >= 0)
        //	break;

        if (waitKey(10) == 32) {
            string fileName = "./" + to_string(index) + ".jpg";
            index++;
            imwrite(fileName, src);
            cout << fileName << "save success !" << endl;
        }

    }
    // the videofile will be closed and released automatically in VideoWriter destructor
    return 0;
}

博主花了1.5天的样子配置这个东西，网上的文章大都是用camke-gui.exe这个可视化的cmake工具在做编译，我一直没搞成功过，后面发现用clion编译也可以，就试着编译了一下，结果成功了，文章有点糙，若在参考过程中遇到问题的朋友可以留言，看到后能帮忙解答的我会回复。