本文最后更新于：2024年6月25日 上午

本文记录 Ubuntu 下 opencv C++ 环境配置，以 4.7.0 为例。

基础流程

  1. 下载 opencv 源码
  2. 安装相关依赖
  3. 源码编译、安装
  4. 配置环境

具体配置

以 opencv 4.7.0 版本为例

基础工具

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sudo apt install cmake
sudo apt install g++
sudo apt install make

资源下载

opencv 源码下载

opencv 拓展库 contrib 源码下载

解压两个源码包，将 contrib 放到 opencv 文件夹内

新建 build 文件夹

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unzip opencv_*
mv opencv_contrib-4.7.0/  opencv-4.7.0/ 
cd opencv-4.7.0 && mkdir build && cd build

安装依赖库

可以根据需要选择安装

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sudo apt-get install build-essential 
sudo apt-get install python-numpy python3-numpy  python-pandas python3-pandas 
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev 
sudo apt-get install libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff5-dev  libdc1394-22-dev 
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev 
sudo apt-get install libxvidcore-dev libx264-dev # 处理视频所需的包 
sudo apt-get install libatlas-base-dev gfortran # 优化opencv功能 
sudo apt-get install ffmpeg

编译安装

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cd build/ 
cmake -D CMAKE_INSTALL_PREFIX=/usr/local -D CMAKE_BUILD_TYPE=build -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib-4.7.0/modules/ ..  
(缺资源就下载复制到.cache中) 
make -j8 
sudo make install

OPENCV_EXTRA_MODULES_PATH 指 contrib 相对路径

环境配置

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sudo vim /etc/ld.so.conf 
增加一行： usr/local/lib 
sudo ldconfig
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include /etc/ld.so.conf.d/*.conf
usr/local/lib

在环境变量中添加：

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export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig

对于 opencv 4

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sudo ln -s /usr/local/include/opencv4/opencv2/ /usr/local/include/

测试运行

源码

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//test_opencv.cpp
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>

#include <iostream>

using namespace cv;
//! [includes]

int main()
{
    //! [imread]
    std::string image_path = "/home/vvd/VVD/lab/cpp-opencv-test/test.png";//samples::findFile("starry_night.jpg")"";
    Mat img = imread(image_path, IMREAD_COLOR);
    //! [imread]

    //! [empty]
    if(img.empty())
    {
        std::cout << "Could not read the image: " << image_path << std::endl;
        return 1;
    }
    //! [empty]

    //! [imshow]
    imshow("Display window", img);
    int k = waitKey(0); // Wait for a keystroke in the window
    //! [imshow]

    //! [imsave]
    if(k == 's')
    {
        imwrite("starry_night.png", img);
    }
    //! [imsave]

    return 0;
}

测试图像：

源码中 image_path 改成自己的图像路径

命令行编译

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g++ -o test_opencv test_opencv.cpp -L /usr/local/lib/  -lopencv_core -lopencv_highgui -lopencv_imgcodecs

执行可执行文件

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./test_opencv

实现效果

Cmake 编译

创建 CMakeLists.txt 文件，放在 test_opencv.cpp 文件旁边

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#cmake needs this line
cmake_minimum_required(VERSION 3.1)

#Define project name
project(Opencv_test)

#Find OpenCV, you may need to set OpenCV_DIR variable
find_package(OpenCV REQUIRED)

#Enable C++11
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)

#Declare the executable target built from your sources
add_executable(Opencv_test  test_opencv.cpp)

#Link your application with OpenCV libraries
target_link_libraries(Opencv_test PRIVATE ${OpenCV_LIBS})

在该文件夹下执行命令

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mkdir build && cd build
cmake ..
make
./Opencv_test

执行效果

参考资料



文章链接：
https://www.zywvvd.com/notes/coding/cpp/ubuntu-cpp-opencv47/ubuntu-cpp-opencv47/

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Coding > C++
#Coding #C++
Ubuntu 配置 c++-opencv 4.7.0 环境配置
https://www.zywvvd.com/notes/coding/cpp/ubuntu-cpp-opencv47/ubuntu-cpp-opencv47/
作者
Yiwei Zhang
发布于
2024年6月24日
许可协议