This post introduces how to install OpenCV3 into a virtualenv on Mac.
If you have not setup virtualenv on your mac, check my post here to do that before you proceed the tutorial in this post.
Let us get started.
Step 1: Activate your virtualenv in your terminal
for example:
$ source ~/ipy-jupyter-venv3/bin/activate
(ipy-jupyter-venv3)$ # Your prompt should change
Step 2: Install OpenCV (modules) according to your needs
- If you need only main modules, in your activated virtualenv in your terminal, run the following
(ipy-jupyter-venv3)$ pip3 install opencv-python
2. If you need both main and contrib modules (check extra modules listing from OpenCV documentation), in your activated virtualenv in your terminal, run the following
(ipy-jupyter-venv3)$ pip3 install opencv-contrib-python
Step 3: Test whether openCV is installed correctly
To test whether OpenCV installed correctly into your virtualenv, in your terminal type in those command below in bold.
(ipy-jupyter-venv3) liping$ python3.6
Python 3.6.5 (default, Mar 30 2018, 06:41:53)
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.39.2)] on darwin
Type “help”, “copyright”, “credits” or “license” for more information.
>>> import cv2
>>> cv2.__version__
‘3.4.3’
>>
Step 4 (optional): To uninstall opencv inside virtualenv, following the command below according to how you installed it.
(ipy-jupyter-venv3) Liping:~$ pip3 uninstall opencv-python
or
(ipy-jupyter-venv3) Liping:~$ pip3 uninstall opencv-contrib-python
Summary:
In this post, you learned how to install and uninstall OpenCV into your virtualenv.
