How to uninstall opencv3.1?

Question

Long story short, the features in OpenCV3.1 does not work for me. I did uninstall the OpenCV3.1 with sudo apt-get purge libopencv* and install the OpenCV2.4.11 with this, but after installing it, The cv2.__version__'s result is '3.1.0'!!

Question:

How to uninstall the OpenCV3.1 and replace it with the 2.4.11 one?

---

Editions:

dpkg -l | grep opencv:

ii  opencv-data 2.4.8+dfsg1-2ubuntu1 all development data for opencv

whereis opencv

opencv: /usr/share/opencv

locate cv.py:

/home/dariush/ardupilot/modules/mavlink/pymavlink/tools/python_array_test_recv.py
/usr/lib/python2.7/dist-packages/cv.py
/usr/lib/python2.7/dist-packages/cv.pyc

Solution

Things that didn't work.

• sudo apt-get purge libopencv-* python-data python-opencv
• Uninstall the 2.4.11 and Installing the OpenCV3.1 from source then Uninstalled.

After I reinstall and uninstalled the 3.1 version I still can import cv2 without any problem, from cv2.__file__ I remove the '/usr/local/lib/python2.7/dist-packages/cv2.so' file.

Then I installed the 2.4version from source and apt-get install python-opencv the cv2.__version__ is OK now.

Comments

[Admin]

How exactly did you install OpenCV3.1 in the first place?

[dariush]

@ParanoidPanda I don't remember!! If I have to guess it would be apt-get.

[Admin]

Please check your command history with history.

[Admin]

It would just be good to know which package you selected to install. You've probably got dependencies from it still left or something.

[steeldriver]

What version of Ubuntu are you using? Please edit your question to include the outputs of dpkg -l | grep opencv and whereis opencv and locate cv.py (these will help us figure out how you likely installed it).

[dariush]

@steeldriver done.

[Admin]

So then purging it with apt-get won't work because that's not how you installed it, you must have purged something else rather than what you compiled from source.

[dariush]

@ParanoidPanda agreed, then how can I fix this now?

[steeldriver]

File /usr/lib/python2.7/dist-packages/cv.py would normally be provided by the opencv python bindings package python-opencv, however that doesn't appear in your dpkg output either so likely was part of your source install. It may be sufficient to install python-opencv from the repository (OTOH it might refuse/complain about overwriting files that are outside of the package management system).