This is one task in the checklist, which says:
Theory:
Set both sliders to a small value = nothing should happen...
Reality:
Setting to small limits /Setting them to the lower limit = Nothing, literally, nothing happens anymore, Workbench not responding anymore.
(Stopped after 5 mins each because didn't expect anything to happen)
Computation with Level = 0,6 took 2 min but produces results
| Status | Assigned | Task | ||
|---|---|---|---|---|
| Open | None | T28479 [Segmentation] Rethink / reevaluate our existing segmentation tools / algorithms | ||
| Invalid | None | T28247 [Segmentation] Watershed tool freezes when slider and threshold are set to a low value | ||
| Resolved | a178n | T28523 Evaluate MITK segmentation survey | ||
| Resolved | kislinsk | T27437 Migrate MITK to use ITK 5.x | ||
| Wontfix | None | T26413 Nifti2 support | ||
| Duplicate | None | T26456 Update ITK to v5 | ||
| Resolved | floca | T28446 Migrate MatchPoint to ITK v5.1 |
We should take the opportunity to discuss the general sense of some segmentation tools. It appears to me that quite a few tools are just there because the algorithm is mentioned in the ITK book. In particular when looking at the abstract parameters that the tools offer I highly doubt they are of use for anyone at all. "alpha", "beta", "gamma", "level", you name it. We should consider to actually remove those tools and invest our time instead in improving tools people use or the integration of the DL algorithms of our department.
Ref T28244: [Segmentation] Fast Marching Tool not really responsive for large images
BTW I also tested with small values and the computation did at least finish after 2 minutes on my desktop PC.
This issue should be postponed until T28523: Evaluate MITK segmentation survey (to now the new priority) and T27437: Migrate MITK to use ITK 5.x (check for performance improvments due to refactored ITK) is done.
Are we keeping Watershed for the next release? I'm currently testing it because of T28641: [Segmentation] Improve Watershed tool documentation and it just stops at 59%.
Edit: I tried to change the level slider but obviously it seems to be more beneficial for the speed to raise the threshold, to reduce the number of local minima and have less regions to start with.