OPT: process_segmentation: merged with dev
OPT: process_segmentation: merged with dev

Former-commit-id: 59d97d032c1322ea80103b95b4a360b5a11031b7
Former-commit-id: c801da6bd71201a18e359ea8e26c9727c600e775
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox