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Hello,
with the recent update, in Opencv 3.4.3, the non-free algorithms such as SIFT and SURF are no more available.
>>>importcv2>>>cv2.__version__'3.4.3'>>>cv2.xfeatures2d.SIFT_create()Traceback (mostrecentcalllast):File"<stdin>",line1,in<module>cv2.error:OpenCV(3.4.3)/io/opencv_contrib/modules/xfeatures2d/src/sift.cpp:1207:error: (-213:Thefunction/featureisnotimplemented)Thisalgorithmispatentedandisexcludedinthisconfiguration;SetOPENCV_ENABLE_NONFREECMakeoptionandrebuildthelibraryinfunction'create'>>>cv2.xfeatures2d.SURF_create()Traceback (mostrecentcalllast):File"<stdin>",line1,in<module>cv2.error:OpenCV(3.4.3)/io/opencv_contrib/modules/xfeatures2d/src/surf.cpp:1016:error: (-213:Thefunction/featureisnotimplemented)Thisalgorithmispatentedandisexcludedinthisconfiguration;SetOPENCV_ENABLE_NONFREECMakeoptionandrebuildthelibraryinfunction'create'
As the error messages say, the library should be recompiled with-D OPENCV_ENABLE_NONFREE=1.
Would it be possible to reintroduce these algorithms in the pip package?
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