26 #include <mln/core/image/image2d.hh>
27 #include <mln/core/image/dmorph/sub_image.hh>
28 #include <mln/core/alias/neighb2d.hh>
29 #include <mln/core/var.hh>
30 #include <mln/value/int_u8.hh>
32 #include <mln/debug/iota.hh>
33 #include <mln/debug/println.hh>
35 #include <mln/morpho/elementary/gradient.hh>
46 int_u8 ref_[9] = { 3, 4, 4,
52 mln_assertion(gra == ref);
56 bool ref_[9] = { 0, 1, 1,
62 data::fill(msk, pw::value(ima) >= pw::cst(5u));
66 mln_assertion(gra == ref);