Linux安装opencv长时间编译问题

问题描述：

Linux下安装opencv-python一直build，最终报错，这里推荐几种方法

解决方法亲测有效:

1.从源代码编译安装OpenCV:

sudo apt update && sudo apt install -y cmake g++ wget unzip
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.x.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.x.zip
unzip opencv.zip
unzip opencv_contrib.zip
mkdir -p build && cd build
cmake -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-4.x/modules ../opencv-4.x
cmake --build .
sudo make install
# or
sudo ninja install

2.使用预构建的二进制文件安装OpenCV:安装python3-opencv包，

sudo apt-get install python3-opencv

3.直接从Ubuntu仓库安装OpenCV​​:

sudo apt update
sudo apt install libopencv-dev python3-opencv