REF: process_segmentation: minor changes
REF: process_segmentation: minor changes

Former-commit-id: 25c65be13df3654cf2d8c4a98c273cef70f68d1a [formerly 7683feeaddd1b46bef6acb5b1211ba0346832a7e]
Former-commit-id: 02d5858da64b550ae9e6582d152fdfcd59f6e7cc
Former-commit-id: 402cddd456677a60ce6525f1a4f1312eb790ad8c
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox