OpenCV does not install Python support correctly

Question

I am trying to install OpenCV with Python-Support on Ubuntu 16.04. I am following this tutorial: http://www.pyimagesearch.com/2016/10/24/ubuntu-16-04-how-to-install-opencv/ I'm stuck at Step #4, the cmake build. As instructed, I'm using

 cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D INSTALL_C_EXAMPLES=OFF \
-D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.2.0/modules \
-D PYTHON_EXECUTABLE=~/.virtualenvs/cv/bin/python \
-D BUILD_EXAMPLES=ON ..

There's no error messages, but the output does not look correct. According to the tutorial, it should look like

Mine looks like this (I created the virtual environment with python3):

Where are the libraries and packages and numpy lines? The folder /usr/local/lib/python3.5/site-packages/ is empty. In the virtual environment I tried running python3 and then import cv2, the output is ImportError: No module named 'cv2'. I should add that this is already the third or fourth attempt of installing OpenCV which might have f'ed things up on the file system, I have no idea. I just want this to be over...

smcs · Accepted Answer · 2017-06-22 13:22:34Z

0

I deleted the whole folder once more and tried again, this time libraries etc were set. What I THINK happened the time before is that I did not install numpy in the virtual environment.

answered Jun 22, 2017 at 13:22

smcs

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