opencv cv::xfeatures2d::SURF::create错误

 

错误描述：运行cv::xfeatures2d::SURF::create 崩溃，出现Error: 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)

解决：依据提示 cmake 时，OPENCV_ENABLE_NONFREE 勾上。