On Programmers.StackExchange there is some additional about the recommendation for a tool, library or other: http://meta.programmers.stackexchange.com/questions/6483/why...

One of the bits in that is a note of a Stack Exchange for Software Recommendations - http://softwarerecs.stackexchange.com which can deal with recommendation questions. This is a social example of 'branch on incompatible policy' from vcs. http://www.bradapp.com/acme/branching/branch-creation.html#P...

Key to asking there is making sure there is enough information being presented so that someone can give the right recommendation: http://meta.softwarerecs.stackexchange.com/questions/336/

You probably should not have used `linux` and `osx` tags for such a specific question.

I was looking for a solution that worked on either

Yeah, but it injected your question to the feeds of people who follow the `linux` or `osx` tag, 99.9+% of whom have no idea how to answer your question, and this resulted in some of them closing your question as off-topic.

Whereas, the people following the `image-processing` and `face-recognition` would probably (my guess) not have closed your question as off-topic.