opencv-python imshow giving errors in mac

Question

I installed opencv-python using pip install, in mac os. Now the cv2.imshow function giving following error

OpenCV Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvShowImage

How can I solve this issue? Why doesn't the pip check opencv dependencies?

Sorry unable to find any solution yet, probably install from source is an option. — Ras
– Ras, Commented Dec 24, 2016 at 0:50
Did you try placing cv2.waitKey() function after cv2.imshow() ? — Jeru Luke
– Jeru Luke, Commented Jan 6, 2017 at 14:17

Brad M · Accepted Answer · 2017-04-20 13:21:26Z

3

Seems launching imshow windows doesn't work when installing opencv-python from pypi. Instead remove that and follow the great instructions at http://www.pyimagesearch.com/2016/12/19/install-opencv-3-on-macos-with-homebrew-the-easy-way/

(Note that no longer need to use --HEAD tag, as of 3.2.0)

In short:

Ensure Xcode installed
brew tap homebrew/science
brew install opencv3 --with-contrib
echo /usr/local/opt/opencv3/lib/python2.7/site-packages >> (YOUR PYTHONPATH)/lib/python2.7/site-packages/opencv3.pth

answered Apr 20, 2017 at 13:21

Brad M

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1 Comment

tsr Over a year ago

After installing with brew it says what commands should be perform for python bindings. In my case these 3 did the job: 1) echo /usr/local/opt/opencv3/lib/python2.7/site-packages >> /usr/local/lib/python2.7/site-packages/opencv3.pth 2)mkdir -p /Users/___XXX___yourHomeDir___XXX___/Library/Python/2.7/lib/python/site-packages 3)echo 'import site; site.addsitedir("/usr/local/lib/python2.7/site-packages")' >> /Users/___XXX___yourHomeDir___XXX___/Library/Python/2.7/lib/python/site-packages/homebrew.pth

sorbet · Accepted Answer · 2017-07-13 00:01:57Z

0

The fix that worked best for me was using mathplotlib instead.

Since you may have to remove all previous versions of OpenCV otherwise and reinstall from source!

answered Jul 13, 2017 at 0:01

sorbet

11

1 Comment

Fabien Over a year ago

The post is 7 months old, the poster probably moved to something else. Recommending him to rewrite a project is not either an accurate answer for other users facing similar issues.

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