closing_golaydilation_golaydilation_seqerosion_golayerosion_seqfittinggen_struct_elementsgolay_elementshit_or_miss_golayhit_or_miss_seqmorph_hatbottom_hat and top_hat.morph_skeletonmorph_skizopening_golayopening_segthickeningthickening_golaythickening_seqthinningthinning_golaythinning_seq