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[Clion]OpenCV配置

CLion使用cmake作为配置工具，新建工程first，默认CMakeLists.txt如下：

# cmake所需最低版本
cmake_minimum_required(VERSION 3.13)
# 工程名
project(first)
# 设置C++规范
set(CMAKE_CXX_STANDARD 14)
# 可执行文件名以及源文件
add_executable(first main.cpp)

需要添加OpenCV的include地址以及libs地址，修改如下：

cmake_minimum_required(VERSION 3.13)
project(first)

set(CMAKE_CXX_STANDARD 14)

set(CMAKE_PREFIX_PATH /home/zj/opencv/debug-3.4.2--py27-py36)
find_package(OpenCV REQUIRED)
# 打印OpenCV版本
MESSAGE("OpenCV version: ${OpenCV_VERSION}")
# 添加include地址
include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(first main.cpp)
# 添加libs地址
target_link_libraries(first ${OpenCV_LIBS})

源文件main.cpp如下

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace cv;
using namespace std;

int main() {
    std::cout << "Hello, World!" << std::endl;
    Mat img = imread("../lena.jpg");
    if (img.empty()) {
        cout << "Error" << endl;
        exit(1);
    }
    imshow("img", img);
    waitKey(0);

    return 0;
}

注意：生成的可执行文件在cmake-build-debug文件夹内，所以引用文件时注意路径

.
├── cmake-build-debug
│   ├── CMakeCache.txt
│   ├── CMakeFiles
│   ├── cmake_install.cmake
│   ├── first
│   ├── first.cbp
│   └── Makefile
├── CMakeLists.txt
├── lena.jpg
└── main.cpp