Unistall opencv 2.4.9 and install 3.0.0
opencv, python, ubuntu, uninstallation
Solution
The procedure depends on whether or not you built OpenCV from source with CMake, or snatched it from a repository.
From repository
`sudo apt-get purge libopencv*` will cleanly remove all traces. Substitute `libopencv*` as appropriate in case you were using an unofficial ppa.
From source
If you still have the files generated by CMake (the directory from where you executed `sudo make install`), `cd` there and `sudo make uninstall`. Otherwise, you can either rebuild them with the exact same configuration and use the above command, or recall your CMAKE_INSTALL_PREFIX (`/usr/local` by default), and remove everything with `opencv` in its name within that directory tree.
Problem
Im using openCV on Ubuntu 14.04, but some of the functions that I require particularly in cv2 library (cv2.drawMatches, cv2.drawMatchesKnn) does not work in 2.4.9. How do I uninstall 2.4.9 and install 3.0.0 from the their git? I know the procedure for installing 3.0.0 but how do I make sure that 2.4.9 get completely removed from disk?