Star Detector, BRIEF and FREAK listed in nonfree modules [closed]

asked 2014-09-03 09:15:07 -0500

Doombot gravatar image

Looking for information on the aforementioned detectors, I noticed they are listed in the "Non-free 2D Features Algorithms" section of the OpenCV docs. See:

I thought only SURF and SIFT were non-free... Could someone confirm the info? It might be only an error in the title of the section, though!

edit retag flag offensive reopen merge delete

Closed for the following reason the question is answered, right answer was accepted by StevenPuttemans
close date 2014-09-05 03:29:59.723605



Mmm, maybe they have a different licence, but I don't know either.

Guanta gravatar imageGuanta ( 2014-09-03 09:37:20 -0500 )edit

If you look at the and click on non free modules (, only SURF and SIFT are non free. Your guess of a different licence seems plausible, but working for a small company I can't afford copyright infringement... ;)

Doombot gravatar imageDoombot ( 2014-09-03 10:10:20 -0500 )edit

Actually as I see it, there is simply a typo in the titel here. xfeatures2d stands for experimental features 2d, though nonfree moved to that module. So basically the first title is wrong and second one is correct. I will add a pull request in the near future to fix this.

StevenPuttemans gravatar imageStevenPuttemans ( 2014-09-04 08:40:34 -0500 )edit
2 here is the solution! Thank you for the report.

StevenPuttemans gravatar imageStevenPuttemans ( 2014-09-04 08:47:20 -0500 )edit

Pull request submitted. This can be marked as solved.

StevenPuttemans gravatar imageStevenPuttemans ( 2014-09-05 03:29:35 -0500 )edit