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/scikit-image/scikit-image/issues/4499 > > 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. > >
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