Why Can't I Import cv2 in Python?

Troubleshooting "Cannot Find Module cv2" Error When Using OpenCV

When importing OpenCV's cv2 module in a Python program, you may encounter an "ImportError: No module named cv2" issue. Here's an analysis of the cause and a solution to rectify the problem:

As mentioned in the query, you have installed OpenCV version 2.4.5 on a Raspberry Pi using a script. Upon attempting to import cv2, the error message indicates that the module cannot be located.

The first point to consider is if OpenCV is correctly installed. To verify this, ensure that the cv2.so file is present in the "/usr/local/lib/python2.7/site-packages/..." directory.

The presence of folders for Python 3.2 and 2.6 in "/usr/local/lib" suggests a potential path configuration issue.

To resolve this, you should run the following commands in Terminal/CMD:

conda update anaconda-navigator  
conda update navigator-updater  

After executing these commands, the instruction "pip install opencv-python" should resolve the issue for Windows users with Anaconda installed.

For Linux systems, you can use:

pip install opencv-python

Alternatively, you can try:

conda install opencv

Refer to the provided links (Link1, Link2) for further details.

Update for Python 3.5 :

If you are using Python versions 3.5 or higher, please refer to these resources: Link3, Link4.

Additional Solution:

For users with Anaconda, you can also utilize the following command (eliminating the need to add the menpo channel):

conda install -c conda-forge opencv

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