Opencv: how to install

Install opencv:

$ sudo apt-get install build-essential
$ sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
$ sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
$ sudo -H pip2 install -U pip numpy
$ sudo -H pip3 install -U pip numpy
$ git clone https://github.com/opencv/opencv.git
$ cd opencv
$ mkdir build

$ cd build

$ cmake -D CMAKE_BUILD_TYPE=RELEASE       -D CMAKE_INSTALL_PREFIX=/usr/local ..
$ make
$ sudo make install
$ sudo ldconfig

Or more simply, this might be enough:

$ sudo apt-get install python-opencv

Or:

$ conda install -c menpo opencv3