code: def get_qpimage_raw(self, idx=0):
          
          # Load experimental data
          nf = np.load(str(self.path), mmap_mode="c", allow_pickle=False)
          meta_data = copy.copy(self.meta_data)
          qpi = qpimage.QPImage(data=nf,
                                which_data=self.storage_type,
                                meta_data=meta_data,
                                h5dtype=self.as_type)
          # get identifier
          qpi["identifier"] = self.get_identifier(idx)
          return qpi
docs: Return QPImage without background correction