opencv-contrib-python added to rosdep/python.yaml

[pep248]

Please add the following dependency to the rosdep database.

Package name:

opencv-contrib-python

Package Upstream Source:

opencv-contrib-python

Purpose of using this:

Some libraries for marker detection in OpenCV are only available in said package.
This package is automatically installed when using pip install opencv-python but not when using apt-get install python-opencv or apt-get install python3-opencv.
Since the request to make OpenCV installable through pip was discarded here, I would like to, at least, have the opencv-contrib-python package available.

Distro packaging links:

Links to Distribution Packages

• PyPi: https://pypi.org/project/opencv-contrib-python/

[methylDragon]

Okay because I do not see an Python opencv-contrib package on the debian package or ubuntu lists

[github-actions]

This PR hasn't been activity in 14 days. If you are still are interested in getting it merged please provide an update. Otherwise it will likely be closed by a rosdistro maintainer following our contributing policy. It's been labeled "stale" for visibility to the maintainers. If this label isn't appropriate, you can ask a maintainer to remove the label and add the 'persistent' label.

[pep248]

Why stale?
What else do I need for the merge to be successfull?

[agonzat]

Hi, what is blocking this pr?

[sloretz]

Standard pip disclaimer: ROS packages that depend on pip keys cannot be released into a ROS distribution. They can only be depended on by from-source builds. Because of this, system packages are highly preferred to pip packages.