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* Error Message for SURF if not implemented In OpenCV 4.5.1 import cv2 as cv cv.xfeatures2d_SURF.create will not create an AttributeError, even if the function is excluded (no nonfree option) In Line 305 (now 306) however ´finder = FEATURES_FIND_CHOICES[args.features]()´ will raise an error: OpenCV(4.5.1) ..\opencv_contrib\modules\xfeatures2d\src\surf.cpp:1029: error: (-213:The function/feature is not implemented) This algorithm is patented and is excluded in this configuration; Set OPENCV_ENABLE_NONFREE CMake option and rebuild the library in function 'cv::xfeatures2d::SURF::create' So we should check with cv.xfeatures2d_SURF.create() correctly if SURF is available |
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