最简洁的基础版 opencv-3.4.x Linux 下安装教程 | 第一个C++ opencv程序运行

最简洁的基础版 opencv-3.4.x Linux 下安装教程

准备工作：需要 Linux 安装好 Gcc、G++、cmake；
gcc、g++ 通常默认有安装，可能会需要升级版本，本文不再赘述；

ccmake 安装和理解

下载特定版本的源码包

• https://github.com/opencv/opencv/releases

• copy到服务器，Linux 环境下一路执行如下命令即可命令

tar -zxvf opencv-3.4.13.tar.gz 
cd opencv-3.4.13
ll

mkdir build
cd build/

# root 用户直接运行，会默认编译安装到/usr/local 目录下
cmake ..
make -j16
make install

# 普通用户，没有 /usr/local 写入权限，需要 指定安装路径

make install DESTDIR=/home/Moli/usr/local 

# 记录编译路径（ CMakeLists.txt 编写是需要指定该路径 ）：

/build/ownOppenCV/opencv-3.4.13/build

  

 

  
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参考博文Ubuntu下多个版本OpenCV管理（Multiple Opencv version）

第一个C++ opencv程序运行

• lap.cpp 只是一个普通的 openCV 示例程序：

• 重要的是 CMakeLists.txt 文件的编写

vim CMakeLists.txt

---

需要修改的是 设定 OpenCV_DIR的路径：
set(OpenCV_DIR /build/ownOppenCV/opencv-3.4.13/build)
指定运行主程序：
add_executable(opencv_example lap.cpp)

# cmake needs this line
cmake_minimum_required(VERSION 3.1)

# Define project name
project(opencv_example_project)

# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
#set(OpenCV_DIR /home/moli/usr/local)

set(OpenCV_DIR /build/ownOppenCV/opencv-3.4.13/build)
find_package(OpenCV REQUIRED)

# If the package has been found, several variables will
# be set, you can find the full list with descriptions
# in the OpenCVConfig.cmake file.
# Print some message showing some of them
message(STATUS "OpenCV library status:")
message(STATUS "    config: ${OpenCV_DIR}")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

# Declare the executable target built from your sources
add_executable(opencv_example lap.cpp)

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


  

 

  
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编译运行，命令如下

mkdir build 
cd build/

 cmake ..
 make 
 ./opencv_example 


  

 

  
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干饭，干饭

博主维新：bravePatch
欢迎各位 初学 OpenCV 的小伙伴添加上方维新，加入 OpenCV 讨论组，添加时备注 【OpenCV入组】 即可，这样好友通过后，我会第一时间直接带您入圈哈；

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文章来源: positive.blog.csdn.net，作者：墨理学AI，版权归原作者所有，如需转载，请联系作者。

原文链接：positive.blog.csdn.net/article/details/116135490