ction\                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Data augmentation\                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Random sample\                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Patch 