Support for importing existing labels as positive/negative scribbles

[robert-graf]

Hi nnInteractive Team,

your tool works very well, but at the moment it is not possible to load existing labels for further refinement. I wanted to ask whether it would be possible to add support for importing labels as positive or negative scribbles, which would enable the following workflows.

Workflow 1: Refining an existing label
An existing label could be imported as a positive scribble. On top of that, we could add new scribbles or remove parts of the existing ones to refine the segmentation.

Workflow 2: Creating a new label without overwriting existing ones
When creating a new label, all existing labels could be imported as negative scribbles. This would explicitly tell the model not to segment those regions, ensuring that previously annotated structures remain untouched.

I think this functionality would make iterative refinement and multi-label workflows much more efficient.

Best regards,
Robert Graf

[FabianIsensee]

Hey Robert,
starting from an existing label is possible, see here: MIC-DKFZ/nnInteractive#25
Workflow 2 should be covered by the 'instance aggregation' option.
Best,
Fabian

[FabianIsensee]

@Lars-Kraemer instance aggregation currently overwrites older labels. I think it should be configured by default such that old labels cannot be overwritten