在Ubuntu上安装Python后,可通过以下几种方法安装OpenCV:
pip3 install opencv-python,可安装最新版OpenCV。若需特定版本,如4.1.1.26,则使用pip3 install opencv-python==4.1.1.26。也可通过清华镜像源加速下载,命令为pip3 install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn。sudo apt update,然后安装python3-opencv,命令为sudo apt install python3-opencv。sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev python3-dev python3-numpy等。再从GitHub克隆OpenCV源代码,进入源码目录创建构建目录并编译安装,最后配置环境变量。