install opencv python27 Mac question

asked 2013-03-28 03:28:55 -0600

updated 2013-03-28 20:02:10 -0600

I have Python 2.7 installed in /Library/Frameworks/Python-framework... along with numpy and scipy; Python 2.7.3 (v2.7.3:70274d53c1dd, Apr 9 2012, 20:52:43) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin; Mac OS 10.6.8 on standard desktop iMac

How can I install opencv linked to _this_ python?

(I've also get a macports python in /opt/local/Library... that was supposed to work with macports opencv; it doesn't because it's getting mixed up with the Apple python, so I hope to be able to remove it without fouling up even more things. Suggestions welcome on this too.)

I should also note that there are dozens of people trying to take a course at Coursera who have a similar problem trying to get Opencv to work on a Mac. We all hope someone expert in Opencv can help.

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answered 2013-03-29 14:43:50 -0600

kieagu
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I'm not sure if opencv's installation is specific to a version of python, but you can always change which version of python is active like this:

sudo port select --set python python27

That will set your active python version to 2.7.

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Correct, it does, but it sets it to Apple's Python, not to the MacPorts Python that has OpenCV attached to it.

johnsankey ( 2013-04-02 17:53:21 -0600 )edit

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answered 2013-03-29 15:19:17 -0600

AlexanderShishkov

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The simplest way that I know contains two steps:

brew install opencv
export PYTHONPATH="/usr/local/lib/python2.7/site-packages:$PYTHONPATH"

Detailed description of brew installation is here.

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This doesn't work for the same reason that MacPorts install of OpenCV doesn't work: changing PYTHONPATH prevents QGIS from working. I need to link OpenCV to Apple's Python. Besides it requires the homebrew Python to be installed, making a third copy of python :-(

johnsankey ( 2013-04-02 17:51:39 -0600 )edit

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install opencv python27 Mac question

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