On Sunday, May 22, 2022, Andrew Randrianasulu <[email protected]> wrote:
On Sunday, May 22, 2022, Phyllis Smith via Cin <[email protected]> wrote:
Checked the 2 patches by Andrew into GIT. Both 2018 and 2020 opencv versions work on Fedora 32 and Ubuntu 16 but I did not test on an older O/S that had the older cmake.
PS: I was thinking that since compiling the latest version on git
works (4.5, on https://github.com/opencv/opencv.git), can we try putting this in CinGG git? I mean instead of the current version 3.
The whole reason for not updating OpenCV is because of licensing with the Surf algorithm which is necessary for FindObj to work well. The later versions (at that time) had the Surf algorithm removed as no longer non-free.
At least here https://github.com/opencv/opencv_contrib/blob/4.x/ modules/xfeatures2d/src/surf.cpp
I still see #ifdef OPENCV_ENABLE_NONFREE
while may be patents for this exactly algo already expired?
ah no, only SIFT patent expired...
https://github.com/herbertbay/SURF/blob/master/LICENSE to be honest licence sounds a bit contradicting itself? ==== Permission to use, copy, modify, and distribute this software and its documentation for educational, research, and non-commercial purposes, without fee and without a signed licensing agreement, is hereby granted, provided that the above copyright notice and this paragraph appear in all copies modifications, and distributions. Any commercial use or any redistribution of this software requires a license from one of the above mentioned establishments. For further details, contact Herbert Bay ([email protected]). ===== how can 'any redistribution' be prohibited if it granted permussion to use, modify and _distribute_ this software forb(research/education) ... and non-commercial purposes?
So if you can verify that Surf is again free and part of the released OpenCV version 4.5, then we can certainly upgrade and that would be very good.