安装opencv和opencv_contrib

安装 OpenCV 和 OpenCV_contrib 可以按照以下步骤进行：

1. 安装依赖项：

   sudo apt-get update
   sudo apt-get upgrade
   sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
   sudo apt-get install python3.5-dev python3-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

2. 下载 OpenCV 和 OpenCV_contrib：

   git clone https://github.com/opencv/opencv.git
   cd opencv
   git checkout 4.5.1
   cd ..
   
   git clone https://github.com/opencv/opencv_contrib.git
   cd opencv_contrib
   git checkout 4.5.1
   cd ..

3. 编译和安装 OpenCV：

   cd opencv
   mkdir build
   cd build
   cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules ..
   make -j4
   sudo make install