Algorithm used in Watershed effect in Segment Editor

MPhilip · February 3, 2022, 12:09pm

@lassoan could you please guide me to relevant documentation of the watershed effect implemented on the 3D slicer detailing the algorithm implemented?

Thanks

lassoan · February 4, 2022, 4:25am

This effect uses MorphologicalWatershedFromMarkersImageFilter class in ITK. See the full implementation here:

github.com

lassoan/SlicerSegmentEditorExtraEffects/blob/5331eafdc77946e957fe771c5324d34dc7c3bc2e/SegmentEditorWatershed/SegmentEditorWatershedLib/SegmentEditorEffect.py#L114-L119

      
        
            featureImage = sitk.GradientMagnitudeRecursiveGaussian(backgroundImage, float(self.scriptedEffect.doubleParameter("ObjectScaleMm")))

            del backgroundImage

            f = sitk.MorphologicalWatershedFromMarkersImageFilter()

            f.SetMarkWatershedLine(False)

            f.SetFullyConnected(False)

            labelImage = f.Execute(featureImage, labelImage)

MPhilip · February 4, 2022, 9:20am

Hi @lassoan.
Thank you very much for the reply.
I would like to know what the algorithm is called. Is it marker controlled watershed transformation algorithm?

Thanks

lassoan · February 4, 2022, 12:54pm

You can find an details about the algorithm in this paper: https://doi.org/10.54294/lf8u75

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Algorithm used in Watershed effect in Segment Editor

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