def __msgc_step3_discontinuity_localization(self):
    """pass"""
    import scipy
    start = self._start_time
    seg = 1 - self.segmentation.astype(np.int8)
    self.stats['low level object voxels'] = np.sum(seg)
    self.stats['low level image voxels'] = np.prod(seg.shape)
    seg_border = scipy.ndimage.filters.laplace(seg, mode='constant')
    logger.debug('seg_border: %s', scipy.stats.describe(seg_border, axis=None))
    seg_border[seg_border != 0] = 1
    logger.debug('seg_border: %s', scipy.stats.describe(seg_border, axis=None))
    boundary_dilatation_distance = self.segparams['boundary_dilatation_distance']
    seg = scipy.ndimage.morphology.binary_dilation(seg_border, np.ones([boundary_dilatation_distance * 2 + 1, boundary_dilatation_distance * 2 + 1, boundary_dilatation_distance * 2 + 1]))
    if self.keep_temp_properties:
        self.temp_msgc_lowres_discontinuity = seg
    else:
        self.temp_msgc_lowres_discontinuity = None
    if self.debug_images:
        import sed3
        pd = sed3.sed3(seg_border)
        pd.show()
        pd = sed3.sed3(seg)
        pd.show()
    self.stats['t3'] = time.time() - start
    return seg