OPT: detect_vertebral_levels: adjusted params
OPT: detect_vertebral_levels: adjusted params

Former-commit-id: 7e02c06a5d8746ba4e91f4b452040044ea058193 [formerly 72b73c22beab46c47ccef896845451cad560fbe2]
Former-commit-id: decb5235b3fca2467ce6d7594101097a70f96bc9
Former-commit-id: a57e12f403be007b993e0da0f29f83087b576579
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox