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Linux系统下安装OpenCV(Ubuntu)

  • 2026-08-18 23:10:43
Linux系统下安装OpenCV(Ubuntu)
适用的OpenCV版本:OpenCV >= 3.0

一、构建核心模块

# Install minimal prerequisites (Ubuntu 18.04 as reference)sudo apt update && sudo apt install -y cmake g++ wget unzip ninja-build# Download and unpack sourceswget -O opencv.zip https://github.com/opencv/opencv/archive/5.x.zipunzip opencv.zip# Create build directorymkdir -p build && cd build# Configurecmake -GNinja  ../opencv-5.x# Buildcmake --build .

二、包含opencv_contrib模块构建OpenCV

# Install minimal prerequisites (Ubuntu 18.04 as reference)sudo apt update && sudo apt install -y cmake g++ wget unzip ninja-build# Download and unpack sourceswget -O opencv.zip https://github.com/opencv/opencv/archive/5.x.zipwget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/5.x.zipunzip opencv.zipunzip opencv_contrib.zip# Create build directory and switch into itmkdir -p build && cd build# Configurecmake -GNinja -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-5.x/modules ../opencv-5.x# Buildcmake --build .

三、流程

    本文提供了构建过程的更多详细信息,并描述了替代方法和工具。请参阅本公众号《安装OpenCV 5.0安装概述》教程以获取一般安装详细信息,并参阅本公众号《OpenCV配置选项参考》以获取配置选项文档。

四、安装编译器和构建工具

1、编译OpenCV,需要有一个C++编译器。通常是G++/GCC或Clang/LLVM:

安装GCC

sudo apt install -y g++

安装Clang

sudo apt install -y clang

2、OpenCV使用CMake构建配置工具:

sudo apt install -y cmake

3、CMake可以为不同的构建系统生成脚本,例如make、ninja:

安装Make:

sudo apt install -y make

安装Ninja:

sudo apt install -y ninja-build
4、安装解压和下载源代码的工具:
安装wget和unzip
sudo apt install -y wget unzip
安装git
sudo apt install -y git
五、下载源代码
有两种方式下载源代码:

1)使用web浏览器或任何下载工具(~80-90Mb)下载存储库的快照并将其解压缩

wget -O opencv.zip https://github.com/opencv/opencv/archive/5.x.zipunzip opencv.zipmv opencv-5.x opencv

2)或使用git将存储库克隆到本地计算机以获取完整的更改历史记录(>470Mb):

git clone https://github.com/opencv/opencv.gitgit -C opencv checkout 5.x
注意

其他分支、发布或提交的快照可以在GitHub和官方下载页面上找到。

六、配置和构建
1、创建构建目录
mkdir -p build && cd build

2、配置-为首选构建系统生成构建脚本

给make生成构建脚本

cmake ../opencv
ninja生成构建脚本
cmake -GNinja ../opencv
3、构建- 运行实际的编译流程
使用make
make -j4
使用ninja
ninja

注意事项

  • 配置阶段可能会从互联网下载部分文件以满足库的依赖要求,网络连接失败可能会导致部分模块或功能被自动关闭,或是出现运行异常。相关的详细说明以及完整的配置选项参考,请查阅本公众号《安装OpenCV 5.0安装概述》本公众号《OpenCV配置选项参考》教程。

  • 如果编译过程中遇到问题,可以尝试清理或重新创建构建目录。配置层面的改动,比如禁用某个依赖、修改构建脚本、将源码切换到其他分支,这类变更很难被构建系统妥善处理,很容易导致工作空间出现损坏无法正常使用。

  • make工具支持并行执行多个编译进程,-j<NUM>参数的作用是指定“同时运行的编译任务数量”。而Ninja构建工具会自动检测当前设备可用的处理器核心数,不需要额外添加-j参数来指定并行任务数。

七、检查构建结果

构建成功后,你可以在build/lib目录下找到生成的库文件,在build/bin目录下找到可执行程序(包括测试程序、示例程序和相关应用程序)。

ls binls lib

CMake 包文件将位于构建根目录中:

ls OpenCVConfig*.cmakels OpenCVModules.cmake

八、安装部署

⚠️ 重要警告

安装过程仅将文件复制到预设位置并执行少量修补操作。采用此方法安装‌不会‌将OpenCV集成到系统包管理器注册表中,因此无法通过系统包管理器自动卸载。由于可能与系统自带软件包发生冲突,我们不建议普通用户执行全系统范围的安装操作。

默认安装路径

默认情况下,OpenCV会被安装到 /usr/loca目录,各类文件的具体分布如下:

/usr/local/bin:可执行程序文件

/usr/local/lib:动态链接库文件(.so)

/usr/local/cmake/opencv5:CMake包配置文件

/usr/local/include/opencv5:头文件

/usr/local/share/opencv5:其他配套资源文件(例如XML格式的训练级联分类器数据)

执行安装命令

由于 /usr/local 目录的所有权归属于root超级用户,执行安装操作时必须提升权限,使用 sudo 命令运行:

sudo make install

或者如果你使用的是Ninja构建系统:

sudo ninja install

自定义安装配置

    你可以通过设置 CMAKE_INSTALL_PREFIX 配置参数来更改安装根目录。例如,添加 -DCMAKE_INSTALL_PREFIX=$HOME/.local 参数,即可将OpenCV安装到当前用户的本地目录下,避免污染系统全局环境。此外,还可以通过 OPENCV_*_INSTALL_PATH 系列参数精细调整各类文件的安装布局。更多详细的配置选项说明,请查阅本公众号《OpenCV配置选项参考》文档。

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  1. CONNECT:[ UseTime:0.001221s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002074s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000812s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000880s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001731s ]
  6. SELECT * FROM `set` [ RunTime:0.000645s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001747s ]
  8. SELECT * FROM `article` WHERE `id` = 505639 LIMIT 1 [ RunTime:0.001170s ]
  9. UPDATE `article` SET `lasttime` = 1787301035 WHERE `id` = 505639 [ RunTime:0.006486s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000269s ]
  11. SELECT * FROM `article` WHERE `id` < 505639 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001839s ]
  12. SELECT * FROM `article` WHERE `id` > 505639 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000389s ]
  13. SELECT * FROM `article` WHERE `id` < 505639 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000975s ]
  14. SELECT * FROM `article` WHERE `id` < 505639 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001352s ]
  15. SELECT * FROM `article` WHERE `id` < 505639 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008640s ]
0.111687s