Installing OpenCV for all conda environments

Question

I have an Ubuntu 16.04 system with an Anaconda installation. I want to compile and install OpenCV 3.3 and use also the Python bindings. I used the following CMake command:

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_CUDA=ON -D D WITH_FFMPEG=1 -D WITH_CUBLAS=ON -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.3.0/modules -D BUILD_EXAMPLES=ON -D BUILD_TIFF=ON -D PYTHON_EXECUTABLE=/home/guel/anaconda2/envs/py27/bin/python -D PYTHON2_LIBRARIES=/home/guel/anaconda2/envs/py27/lib/libpython2.7.so -D PYTHON2_PACKAGES_PATH=/home/guel/anaconda2/envs/py27/lib/python2.7/site-packages -DWITH_EIGEN=OFF -D BUILD_opencv_cudalegacy=OFF ..

The command does the job but then, of course, OpenCV is installed only for a specific conda environment that I created. However, I want to be able to use it also from different environments without having to go through the compilation for each and every environment. Is there a way to achieve that in a simple way? Since the OpenCv libraries are actually installed in /usr/local, I can imagine that there must be a simple way to link the libraries to each new conda enviroment but I couldn't figure out exactly how.

Answer 1

OpenCV 3.3 for python 2.7 and 3.6 on linux are available from conda repository. You may not need to compile yourself. Just use conda command to install it to your environement.

See this

1. https://anaconda.org/conda-forge/opencv for the commands.
   • conda install -c conda-forge -n env opencv or
   • conda install -c conda-forge/label/broken -n env opencv
   • where env is your conda virtual environment name
2. https://anaconda.org/conda-forge/opencv/files for detailed files on python version and OS.

Hope this help.

Answer 2

So you are providing the python package and library path to environment specific location, in order to make it available environment try using the anaconda/bin and lib path. Can't make it as a comment due to low reputation.