def __init__( self ):
    super(VesselExtractionStep, self).__init__()

    self.initialize( 'VesselExtractionStep' )
    self.setName( 'Extract the vessels skeletons' )
    self.setDescription('Extract the shape of the vessels of the input image')

    self.createExtractVesselOutputConnected = False
    self.createExtractVesselSeed = False
    self.logic = SegmentTubesLogic()