[人工智能]在VS2019安装OpenCV库

1. 安装visual studio 2019

https://visualstudio.microsoft.com/zh-hans/vs/?安装企业版，不要安装社区版(功能不全)

blob:https://visualstudio.microsoft.com/fa0456c4-9a1c-4e6d-8103-11159db7a838

2. 安装git for windows

https://github.com/git-for-windows/git/releases/download/v2.32.0.windows.2/Git-2.32.0.2-64-bit.exe

3. 下载opencv代码或者安装包

链接：https://pan.xunlei.com/s/VMfT4RZJ2O0R6FAgABo8bJZXA1
提取码：p5ht
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4. cmake编译opencv

https://docs.opencv.org/master/d3/d52/tutorial_windows_install.html#tutorial_windows_install_path

Installation by Using git-bash (version>=2.14.1) and cmake (version >=3.9.1)

1. You must download?cmake (version >=3.9.1)?and install it. You must add cmake to PATH variable during installation
2. You must install?git-bash (version>=2.14.1). Don't add git to PATH variable during installation
3. Run git-bash. You observe a command line window. Suppose you want to build opencv and opencv_contrib in c:/lib
4. In git command line enter following command (if folder does not exist) :

   mkdir /c/lib
   cd /c/lib

5. save this script with name installOCV.sh in c:/lib

   #!/bin/bash -e
   myRepo=$(pwd)
   CMAKE_GENERATOR_OPTIONS=-G"Visual Studio 16 2019"
   #CMAKE_GENERATOR_OPTIONS=-G"Visual Studio 15 2017 Win64"
   #CMAKE_GENERATOR_OPTIONS=(-G"Visual Studio 16 2019" -A x64)  # CMake 3.14+ is required
   if [  ! -d "$myRepo/opencv"  ]; then
       echo "cloning opencv"
       git clone https://github.com/opencv/opencv.git
   else
       cd opencv
       git pull --rebase
       cd ..
   fi
   if [  ! -d "$myRepo/opencv_contrib"  ]; then
       echo "cloning opencv_contrib"
       git clone https://github.com/opencv/opencv_contrib.git
   else
       cd opencv_contrib
       git pull --rebase
       cd ..
   fi
   RepoSource=opencv
   mkdir -p build_opencv
   pushd build_opencv
   CMAKE_OPTIONS=(-DBUILD_PERF_TESTS:BOOL=OFF -DBUILD_TESTS:BOOL=OFF -DBUILD_DOCS:BOOL=OFF  -DWITH_CUDA:BOOL=OFF -DBUILD_EXAMPLES:BOOL=OFF -DINSTALL_CREATE_DISTRIB=ON)
   set -x
   cmake "${CMAKE_GENERATOR_OPTIONS[@]}" "${CMAKE_OPTIONS[@]}" -DOPENCV_EXTRA_MODULES_PATH="$myRepo"/opencv_contrib/modules -DCMAKE_INSTALL_PREFIX="$myRepo/install/$RepoSource" "$myRepo/$RepoSource"
   echo "************************* $Source_DIR -->debug"
   cmake --build .  --config debug
   echo "************************* $Source_DIR -->release"
   cmake --build .  --config release
   cmake --build .  --target install --config release
   cmake --build .  --target install --config debug
   popd

   In this script I suppose you use VS 2015 in 64 bits

   CMAKE_GENERATOR_OPTIONS=-G"Visual Studio 14 2015 Win64"

   and opencv will be installed in c:/lib/install/opencv

   -DCMAKE_INSTALL_PREFIX="$myRepo/install/$RepoSource"

   with no Perf tests, no tests, no doc, no CUDA and no example

   CMAKE_OPTIONS=(-DBUILD_PERF_TESTS:BOOL=OFF -DBUILD_TESTS:BOOL=OFF -DBUILD_DOCS:BOOL=OFF -DBUILD_EXAMPLES:BOOL=OFF)

6. In git command line enter following command :

   ./installOCV.sh

7. Drink a coffee or two... opencv is ready : That's all!
8. Next time you run this script, opencv and opencv_contrib will be updated and rebuild

----------- 引用结束 ---------------

1 解压好的文件如下:

?2 配置path环境变量

?3. VS2019中的配置

?（1）右键项目属性

?（2）VC++目录，平台选择X64，右侧包含目录和库目录

• include头文件目录

包含目录和库目录都是你之前OpenCV的安装路径，将下面两个路径添加进去

?D:\opencv\build\include\opencv2? 我试过了这个可以不加
D:\opencv\build\include

• 库目录

将下面的路径添加进去

?D:\opencv\build\x64\vc15\lib

（3）修改附加依赖项

将下面的.lib手动打上去，在D:\你的OpenCV安装目录\build\x64\vc15\lib中找

?

?Linker -> Input -> Aditional Dependencies

在安装路径下找到?D:\opencv\build\x64\vc15\lib

?所以这么配置

?额外的依赖.lib文件 后面的版本号在opencv bin路径下找 opencv_world453d.lib

4. 测试

#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
#include <iostream>

int main(int argc, char** argv)
{
/*
    if (argc != 2)
    {
        cout << " Usage: " << argv[0] << " ImageToLoadAndDisplay" << endl;
        return -1;
    }
*/
    cv::Mat image;
    // image = imread(argv[1], IMREAD_COLOR); // Read the file
    image = cv::imread("C:/Users/mingz/Pictures/Saved Pictures/cat.png", cv::IMREAD_COLOR);
    if (image.empty()) // Check for invalid input
    {
        std::cout << "Could not open or find the image" << std::endl;
        return -1;
    }
    cv::namedWindow("Display window", cv::WINDOW_AUTOSIZE); // Create a window for display.
    cv::imshow("Display window", image); // Show our image inside it.
    int k = cv::waitKey(0); // Wait for a keystroke in the window

    // save as ...
    if (k == 's') {
        cv::imwrite("cat2.png", image);
    }
    return 0;
}

Solution Explorer中右键 项目名称

Rebuild

接下来看opencv的教程

https://docs.opencv.org/master/d9/df8/tutorial_root.html