[树莓派]ubuntu18.0.4编译安装opencv

mkdir build
cd build

opencv编译参数

cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D OPENCV_EXTRA_MODULES_PATH=~/Downloads/opencv_contrib/modules \
    -D BUILD_opencv_python3=ON \
    -D BUILD_opencv_python2=OFF \
    -D PYTHON_DEFAULT_EXECUTABLE=/usr/python37/bin/python3.7 \
    -D PYTHON_EXECUTABLE=/usr/python37/bin/python3.7 \
    -D PYTHON3_INCLUDE_DIR=/usr/python37/include/python3.7m \
    -D PYTHON_LIBRARY=/usr/python37/lib/libpython3.7m.a \
    -D BUILD_EXAMPLES=ON  \
    -D INSTALL_C_EXAMPLES=OFF \
    -D OPENCV_ENABLE_NONFREE=ON ..

遇到的问题

安装UBUNTU18.04环境下的OpenCV3.4.1

/home/wgy/opencv-3.4.1/modules/python/src2/cv2.cpp:22:40: fatal error: pyopencv_generated_include.h: No such file or directory
 #include "pyopencv_generated_include.h"
                                        ^
compilation terminated.
modules/python3/CMakeFiles/opencv_python3.dir/build.make:62: recipe for target 'modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.o' failed
make[2]: *** [modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.o] Error 1
CMakeFiles/Makefile2:20921: recipe for target 'modules/python3/CMakeFiles/opencv_python3.dir/all' failed
make[1]: *** [modules/python3/CMakeFiles/opencv_python3.dir/all] Error 2
Makefile:162: recipe for target 'all' failed
make: *** [all] Error 2

解决办法

python ./modules/python/src2/gen2.py ./build/modules/python_bindings_generator ./build/modules/python_bindings_generator/headers.txt