Allow to pass a Segmap object

    from joblib import delayed, Parallel

    logger = logging.getLogger(__name__)

    segmap_img = Segmap(segmap)

    logger.info('Aligning segmap with reference image')

    if isinstance(ref_image, str):

        ref_image = Image(ref_image)

    if isinstance(catalog, str):

        catalog = Catalog.read(catalog)

    if not isinstance(segmap, Segmap):

        segmap = Segmap(segmap)

    segm = segmap_img.align_with_image(ref_image, truncate=True, margin=margin)

    logger.info('Aligning segmap with reference image')

    segm = segmap.align_with_image(ref_image, truncate=True, margin=margin)

    dilateit, struct = _get_psf_convolution_params(convolve_fwhm, segm,

                                                   psf_threshold)