Rongke-Wei

Thank you very much for your reply. I think use 'auto sift_regions = dynamic_cast(regions_type.get());’ is a good idea, but there are always errors in my program. Such as,'/home/wrk/software/openMVG/src/openMVG/sfm/pipelines/sfm_features_provider.hpp:81:13: error: ‘sift_regions’...

@pmoulon Thanks.

Thank you very much for your reply. But there is a difference between P2 in this paper and P2 in the code. In this paper：  In code: