How to install openCv in Digital Ocean ubuntu One click AI droplet.

Digital Ocean doesn’t come with a pre-installed “one click” solution for OpenCV. You can do the install as follows on an Ubuntu 16.04 droplet

// Open CV 3

sudo apt-get -y install libtiff5-dev

sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev sudo apt-get -y install libxine2-dev libv4l-dev sudo apt-get -y install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev sudo apt-get -y install qt5-default libgtk2.0-dev libtbb-dev sudo apt-get -y install libatlas-base-dev sudo apt-get -y install libfaac-dev libmp3lame-dev libtheora-dev sudo apt-get -y install libvorbis-dev libxvidcore-dev sudo apt-get -y install libopencore-amrnb-dev libopencore-amrwb-dev sudo apt-get -y install x264 v4l-utils sudo apt-get install -y gcc-5 g+±5

// Optional sudo apt-get -y install libprotobuf-dev protobuf-compiler sudo apt-get -y install libgoogle-glog-dev libgflags-dev sudo apt-get -y install libgphoto2-dev libeigen3-dev libhdf5-dev doxygen

// download opencv-3.3.1 wget https://github.com/opencv/opencv/archive/3.3.1.zip -O opencv-3.3.1.zip unzip opencv-3.3.1.zip

// download opencv_corntib-3.3.1 wget https://github.com/opencv/opencv_contrib/archive/3.3.1.zip -O opencv_contrib-3.3.1.zip unzip opencv_contrib-3.3.1.zip

cd opencv-3.3.1 mkdir release cd release

// compile and install export CC=/usr/bin/gcc-5 export CXX=/usr/bin/g+±5 cmake -D CMAKE_BUILD_TYPE=RELEASE
-D CMAKE_INSTALL_PREFIX=/usr/local
-D INSTALL_C_EXAMPLES=ON
-D INSTALL_PYTHON_EXAMPLES=ON
-D WITH_TBB=ON
-D WITH_V4L=ON
-D WITH_QT=ON
-D WITH_OPENGL=ON
-D OPENCV_EXTRA_MODULES_PATH=…/…/opencv_contrib-3.3.1/modules
-D BUILD_EXAMPLES=ON …

// Build with all cores make “-j$(nproc)”

sudo make install sudo sh -c ‘echo “/usr/local/lib” >> /etc/ld.so.conf.d/opencv.conf’ sudo ldconfig

Need to add:

sudo apt-get install unzip

before:

// download opencv-3.3.1

opencvcontrib url path changed to opencv_contrib