1、编写CMakeLists.txt

cmake_minimum_required(VERSION 3.20)		# 指定运行的cmake最低版本
project(demo_cpp)
set(OpenCV_DIR G:/Install_package/opencv/build)	# 设置OpenCV_DIR的路径

find_package(OpenCV) #cmake会到OpenCV_DIR目录下寻找OpenCVConfig.cmake文件，自动配置opencv
include_directories(${OpenCV_INCLUDE_DIRS}) # 包含头文件

message(${OpenCV_INCLUDE_DIRS})
message(${OpenCV_LIBS})

add_executable(main main.cpp)	
target_link_libraries(main ${OpenCV_LIBS})	# 链接文件

2、编写main.cpp

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

int main()
{

    std::cout << "hello,world" << std::endl;
    cv::Mat Image = cv::imread("D:/6_cuda_code/cuda-image-preprocess/lena.jpg");

    std::cout << "Image.cols:" <<Image.cols << ",Image.cols:"<< Image.rows<< std::endl;
    return 0;
}

3、编译运行程序
3.1 使用cmake构建项目

cmake -B build -G"Visual Studio 16 2019"

3.2 编译项目

cmake --build build

3.3 运行exe

.\build\Debug\main.exe