vinllen vinllen - 3 months ago 20
Python Question

Cannot import cv2 in python in OSX

I have installed OpenCV 3.1 in my Mac, cv2 is also installed through

pip install cv2
.

vinllen@ $ pip install cv2
You are using pip version 7.1.0, however version 7.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Requirement already satisfied (use --upgrade to upgrade): cv2 in /usr/local/lib/python2.7/site-packages


But it looks like
cv2
and
cv
cannot be used:

Python 2.7.10 (default, Jul 13 2015, 12:05:58)
[GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named cv2
>>> import cv
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named cv


I have tried almost all the solutions list online, but cannot work.

Answer

I do not know what pip install cv2 actually installs... but is surely not OpenCV. pip install cv2 actually installs this, which are some blog distribution utilities, not sure what it is, but it is not OpenCV.


To properly install OpenCV, check any of the links @udit043 added in the comment, or refer to any of the tutorials bellow:

Find here a tutorial on how to install OpenCV on OS X: http://www.pyimagesearch.com/2015/06/15/install-opencv-3-0-and-python-2-7-on-osx/

You need to actually compile OpenCV from source and activate python bindings, which takes a while.

Another option is to use brew to get OpenCV, but doesn't neccesarilly get you the last version nor a fully optimized one:

http://www.mobileway.net/2015/02/14/install-opencv-for-python-on-mac-os-x/

Comments