The "Checkliste Segmentierung - 3D Segmentierung" states that a preview segmentation mask will be removed if the clear button is pressed. Instead, only the set seed point will be removed.
To reproduce:
| rMITK MITK | |||
| Restricted Differential Revision | rMITKb2d2a87ebd29 Clear preview segmentation in fast marching 3D | ||
| Restricted Differential Revision | rMITK2e6b97654f2c Update also if the seed points are empty | ||
So I looked into it and the function behind the clear button actually is called OnClearSeeds so I was wondering what the expected result should be
Note: Using the Fast Marching 2D tool the green preview segmentation will indeed be removed. In the 3D case the green preview will actually be removed after the clear button has been pressed, only if a new seed-point is set (and a new green preview segmentation is generated).
I vote for option (2).
If we stick with (1) the button-description should be modified (which says Clear current result and start over again) and be consistent with the 2D tool (so change the behavior there).
It basically seems as if some m_FastMarchingFilter->Modified(); or similar is missing, after the seed points have been removed (to trigger the new green preview segmentation, which would be empty without seed points).
Edit: The update is correctly trigered.
There was actually a change made to the fast marching tool 3D such that it is now checking !m_SeedContainer->empty() inside an update. This container is obviously empty if the seed points have been removed so no fast marching will be performed and thus the filters will not be applied, the output will not be regenerated.