Install opencv in mac osx

The most straightforward way is via homebrew.

brew update 
sudo brew install opencv

Then, all of the dependencies will be install with opencv. The reason to use sodu is because there will be twice brew link used in the process which could not link certain libraries without permission.

Finally, the brew gave a wrong file to update. Instead of updating .profile, the correct destination should be .bash_profile. And add the line: export PYTHONPATH=/usr/local/lib/python2.7/site-packages/:$PYTHONPATH

That is it.

cheers,