Simplify OpenSfM open source, suitable for beginner of SfM.
The process is based on the procedure of OpenSfM (python)--extract EXIF (Output is a text document), detect feature(Use pickle.dump to save feature including (x,y)/color(r,g,b) and feature ID), match feature (Use pickle.load to load detected feature and pickle.dump to save matches), create track (Input is matches and output is track based on track_graph)