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[Otsu/Watershed Bug] Time points skipped while browsing segmentation Preview
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Description

While Previewing segmentations for different time steps in Otsu/Watershed tools, the time slider in Image Navigator skips a time step. However, mask computation happens for the skipped one, as well.

Steps:

  1. Load 4D image (at least 3 timesteps)
  2. Get to OTSU tool at t=0.
  3. Click Preview. Preview mask appears.
  4. Increment the spin box once for time in Image Navigator:

Instead of slider moving to t=1, it moves to t=2, automatically.

OS: Found in Windows 10. MacOS doesn't seem to have this bug. Ubuntu not tested.
Code: Can be replicated on the latest develop branch.

Bug video attached.