备份一下opencv编译指令：
tar -xzvf opencv-3.4.16.tar.gz
cd opencv-3.4.16
mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/opt/envs/opencv/opencv-3.4.16 ..
make -j8 && make install
opencv完整编译选项：
cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=ON \
-DCMAKE_INSTALL_PREFIX=/usr/local \
-DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.3.0/modules -DOPENCV_ENABLE_NONFREE=ON\
-DBUILD_opencv_python3=ON -DWITH_1394=OFF \
-DWITH_IPP=ON -DWITH_TBB=ON -DWITH_OPENMP=ON -DWITH_PTHREADS_PF=ON \
-DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DOPENCV_GENERATE_PKGCONFIG=ON \
-DWITH_CUDA=ON -DENABLE_FAST_MATH=ON -DCUDA_FAST_MATH=ON -D WITH_CUBLAS=ON \
-DPYTHON3_LIBRARY=$(python3 -c "from distutils.sysconfig import get_config_var;from os.path import dirname,join ; print(join(dirname(get_config_var('LIBPC')),get_config_var('LDLIBRARY')))") \
-DPYTHON3_NUMPY_INCLUDE_DIRS=$(python3 -c "import numpy; print(numpy.get_include())") \
-DPYTHON3_PACKAGES_PATH=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")