Here is the full discussion on debian mailing list : https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734373
nonfree (SIFT and SURF) where indeed removed upstream by Debian because of the patents. To my knowledge there haven't been any patent disputes over these algorithms. Also if using SIFT in your software becomes a problem, there are other invariant features detectors / descriptors one can use. For now Sift is a good implementation that does the job, and it would be great to have. ** Bug watch added: Debian Bug tracker #734373 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734373 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1101049 Title: non-free algorithms (e.g. SIFT) excluded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/opencv/+bug/1101049/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs