OpenCV Version Issue

Question

How to check the current version of OpenCV for mac and how to update my version to the newest version? I am trying to use the drawMatchesKNN and drawMatches function. The er

Answer 1

If you use Python, run below code will get the OpenCV version:

import cv2
print cv2.__version__

3.2.0

3.2.0 is the latest one. As for upgrade on macOS, if you are using Anaconda, it would be easier. You may refer to this page to get some more information. For draw matching and related functions, seems you need to have opencv_contrib modules (I haven't checked at the time being).

EDIT:

The Anaconda repository has two channels with OpenCV 3.2.0 available.

You may try conda install -c menpo opencv3=3.2.0. This menpo repository does have OpenCV 3.2.0 for Python 2.7/3.4/3.5 and for linux-64.

The conda-forge repository, conda install -c conda-forge opencv=3.2.0, has many difference version of binary on OpenCV 3.2. You may have a trial this conda-forge if the menpo package doesn't work. You can check its file page on the binary available.

To uninstall the conda package, just type conda uninstall opencv3 for OpenCV 3.x.

Before installing OpenCV 3.x, it would be better to uninstall your OpenCV 2.4.8 to avoid conflict. You may try conda uninstall opencv for OpenCV 2.x or find out the package name by conda list.

As for the OSX, what are the version you are using?

Answer 2

It depends how you installed it. If you use homebrew and you did:

brew install opencv

then, you can get your version with:

brew info opencv

and you can get the latest version with:

brew upgrade opencv

---

If you did:

brew install opencv3

then you need to do:

brew info opencv3

and you can upgrade with:

brew upgrade opencv3

---

If you cloned the git repo on github, you need to go to your build directory and run:

more *tmp

and you can upgrade with:

cd /where/ever/you/cloned/opencv
git pull
cd /where/ever/you/built/opencv
cmake /where/ever/you/cloned/opencv
make -j 8
sudo make install

Failing all that, build a simple executable that calls getBuildInformation()