ubuntu安装并配置opencv以及配置opencv-python

痛定思痛。 2023-05-30 10:56 128阅读 0赞

0.安装前，首先确定是否安装了anaconda，如果安装了，先卸载掉

1.去官网下载opencv的source包

2.解压

unzip opencv-3.4.3.zip
    cd opencv-3.4.3

3.安装依赖库

sudo apt-get install cmake  
    sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev

4.执行编译

mkdir build
    cd ./build
    
    cmake ..

5.make

make -j4

6.sudo make install，这步将Lib等信息复制到/usr/local/lib

sudo make install

6.将OpenCV的库添加到路径

sudo gedit /etc/ld.so.conf.d/opencv.conf

执行此命令后打开的可能是一个空白的文件，不用管，只需要在文件末尾添加

/usr/local/lib

7.生效配置文件

sudo ldconfig

8.配置bash

sudo gedit /etc/bash.bashrc

在末尾追加：

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

保存，执行如下命令使得配置生效：

source /etc/bash.bashrc

9.小程序测试

opencv-4.1.1/samples/cpp/example\_cmake 目录下，官方已经给出了一个cmake的example，

cmake .
    make
    ./opencv_example

遇到问题：

1.usr/local/lib下并没有Opencv库

执行

sudo cp -a ./opencv-4.1.1/build/bin /usr/local/
    sudo cp -a ./opencv-4.1.1/build/lib /usr/local/
    sudo cp ./opencv-4.1.1/include/opencv2/opencv.hpp /usr/local/include/

2.Cmake时提示，

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则打开CMakeLists.txt，添加set(Opencv\_DIR /home/username/Downloads/opencv-4.1.1/build)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hcnRpbmtlaXRo_size_16_color_FFFFFF_t_70 1][]

10.配置opencv-python

1)安装pip以及opencv-python

sudo apt install python3-pip

pip3 install opencv-python

2）将python默认版本由2改成3

先查看当前默认的版本

python --version

更改默认版本

echo alias python=python3 >> ~/.bashrc

source ~/.bashrc

再次查看版本

python --version

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