Linux安装opencv

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3. 安装前的准备

   yum -y --nogpgcheck install git
   yum -y --nogpgcheck install gcc
   yum -y --nogpgcheck install numpy
   yum -y --nogpgcheck install gcc-c++
   yum -y --nogpgcheck install tbb-devel
   yum -y --nogpgcheck install gtk2-devel
   yum -y --nogpgcheck install epel-release
   yum -y --nogpgcheck install eigen3-devel
   yum -y --nogpgcheck install libv4l-devel
   yum -y --nogpgcheck install libpng-devel
   yum -y --nogpgcheck install jasper-devel
   yum -y --nogpgcheck install openexr-devel
   yum -y --nogpgcheck install libwebp-devel
   yum -y --nogpgcheck install libtiff-devel
   yum -y --nogpgcheck install libdc1394-devel
   yum -y --nogpgcheck install qt5-qtbase-devel
   yum -y --nogpgcheck install libjpeg-turbo-devel
   yum -y --nogpgcheck install boost boost-thread boost-devel
   yum -y --nogpgcheck install boost boost-thread boost-devel
   yum -y --nogpgcheck install python python-devel python-pip
   yum -y --nogpgcheck install freeglut-devel mesa-libGL mesa-libGL-devel
   yum -y --nogpgcheck install python34 python34-devel python34-pip python34-numpyx
   

4. 更新CMAKE

5. 安装ffmpeg

6. 安装opencv

   cd /root
   mkdir build
   cd /root/build
   
   wget --no-check-certificate -c https://github.com/opencv/opencv/archive/refs/tags/4.9.0.tar.gz -O opencv-4.9.0.tar.gz 
   tar -xf opencv-4.9.0.tar.gz
   
   git clone https://github.com/opencv/opencv_contrib.git
   
   # ↓下面↓命令中的‘gcc’、‘g++’请根据自己的系统灵活变通
   cmake /root/build/opencv-4.9.0 \
   -DCMAKE_BUILD_TYPE=RELEASE \
   -DCMAKE_C_COMPILER=/usr/bin/gcc \
   -DCMAKE_CXX_COMPILER=/usr/bin/g++ \
   -DCMAKE_INSTALL_PREFIX=/usr/local/opencv \
   -DOPENCV_EXTRA_MODULES_PATH=/root/build/opencv_contrib/modules
   
   make -j$(nproc)
   make -j$(nproc) install
   opencv_version
   echo '/usr/local/lib' >> /etc/ld.so.conf.d/opencv.conf