ubuntu 16.04 에서 opencv를 설치하자.

여기저기 엄청 다양한 방법들이 인터넷에 있기에 정리를 해 두자

0. 이전 버전 opencv가 있을 경우 삭제하기

$ sudo apt-get purge  libopencv* python-opencv

$ sudo apt-get autoremove

(설치 코드를 삭제하지 않고 그대로 둔 경우 - 설치경로에서)

$ sudo make uninstall

1. 관련 라이브러리 설치하기

$ sudo apt-get update

$ sudo apt-get install --assume-yes build-essential cmake git build-essential pkg-config unzip ffmpeg qtbase5-dev python-dev python3-dev python-numpy python3-numpy libopencv-dev libgtk-3-dev libdc1394-22 libdc1394-22-dev libjpeg-dev libpng12-dev libtiff5-dev libjasper-dev libavcodec-dev libavformat-dev libswscale-dev libxine2-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev libtbb-dev libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev v4l-utils 

$ sudo apt-get install gtk2.0 libopencv-dev build-essential checkinstall cmake pkg-config yasm libtiff4-dev libjpeg-dev libjasper-dev libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev python-dev python-numpy libtbb-dev libqt4-dev libgtk2.0-dev libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev x264 v4l-utils ffmpeg

2. opencv 설치

$ mkdir opencv

$ cd opencv

$ git clone https://github.com/Itseez/opencv.git

$ cd opencv

(또는

$ wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.3.0.zip --> 버전 지정 가능

$ unzip opencv.zip

)

$ mkdir release

$ cd release

$ cmake -D CMAKE_BUILD_TYPE=RELEASE \

-D CMAKE_INSTALL_PREFIX=/usr/local \

-D WITH_TBB=ON \

-D WITH_IPP=OFF \

-D WITH_1394=OFF \

-D BUILD_WITH_DEBUG_INFO=OFF \

-D BUILD_DOCS=OFF \

-D INSTALL_C_EXAMPLES=OFF \

-D INSTALL_PYTHON_EXAMPLES=OFF \

-D BUILD_EXAMPLES=OFF \

-D BUILD_TESTS=OFF \

-D BUILD_PERF_TESTS=OFF \

-D WITH_QT=ON \

-D WITH_OPENGL=ON \

-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \

-D WITH_V4L=ON  \

-D BUILD_NEW_PYTHON_SUPPORT=ON \

..

(단 extra module을 사용하기위해서는 opencv_contrib 파일도 다운받아 압축을 풀어 놓아야 함

$ wget -O opencv_contrib.zip https://github.com/Itseez/opencv_contrib/archive/3.3.0.zip 

$ unzip opencv_contrib.zip )

$ make -j9

$ sudo make install

$ sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'

$ sudo ldconfig

(이부분은 보통 경로 잡혀있으니 건너뛰어도 될 듯. 안될 경우 시도)

혹은 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

3. opencv 설치 후 버전 확인

$ pkg-config --modversion opencv