[Olena-patches] 3219: New overload for debug slices_2d with a h/v ratio.

https://svn.lrde.epita.fr/svn/oln/trunk/milena Index: ChangeLog from Thierry Geraud &lt;thierry.geraud(a)lrde.epita.fr&gt; New overload for debug slices_2d with a h/v ratio. * mln/debug/slices_2d.hh: New overload. * tests/debug/slices_2d.cc: Augment. mln/debug/slices_2d.hh | 93 +++++++++++++++++++++++++++++++++++++++++++---- tests/debug/slices_2d.cc | 36 ++++++++++++++++-- 2 files changed, 119 insertions(+), 10 deletions(-) Index: mln/debug/slices_2d.hh --- mln/debug/slices_2d.hh (revision 3218) +++ mln/debug/slices_2d.hh (working copy) @@ -32,6 +32,8 @@ /// /// Create a 2D image of the slices of the 3D image \p input. +# include <cmath> + # include <mln/core/image/image2d.hh> # include <mln/core/image/image3d.hh> @@ -60,6 +62,15 @@ const mln_value(I)& bg); + /// Create a 2D image of the slices of the 3D image \p input. + /// + template <typename I> + image2d<mln_value(I)> + slices_2d(const Image<I>& input, + float ratio_hv, // horizontal / vertical + const mln_value(I)& bg); + + # ifndef MLN_INCLUDE_ONLY @@ -84,26 +95,96 @@ if (input.nslices() != n_horizontal * n_vertical) data::fill(output, bg); + const point3d& p_min = input.domain().pmin(); + def::coord + sli = p_min.sli(), + last_sli = input.domain().pmax().sli(); for (unsigned i = 0; i < n_vertical; ++i) for (unsigned j = 0; j < n_horizontal; ++j) { - unsigned sli = i * n_horizontal + j; - if (sli == input.nslices()) + dpoint2d dp(i * input.nrows() - p_min.row(), + j * input.ncols() - p_min.col()); + data::paste(apply_p2p(slice(input, sli), + fun::p2p::translation(dp)), + output); + if (++sli > last_sli) { + // Go out of loops. i = n_vertical; j = n_horizontal; break; } - dpoint2d dp(i * input.nrows(), j * input.ncols()); - data::paste(apply_p2p(slice(input, sli), - fun::p2p::translation(dp)), - output); } trace::exiting("debug::slices_2d"); return output; } + + namespace internal + { + + unsigned round_up(float f) + { + unsigned n = static_cast<unsigned>(f + 0.499999f); + int i; + if (n == 0u) + ++n; + if (float(n) < f) + ++n; + return n; + } + + void slices2d_helper(float nslis, float nrows, float ncols, + float ratio_hv, + unsigned& n_horizontal, + unsigned& n_vertical) + { + if (ratio_hv > 1.f) + { + float n_v = std::sqrt(nslis * ncols / ratio_hv / nrows); + n_vertical = internal::round_up(n_v); + float n_h = nslis / float(n_vertical); + n_horizontal = internal::round_up(n_h); + } + else + { + float n_h = std::sqrt(nrows * nslis * ratio_hv / ncols); + n_horizontal = internal::round_up(n_h); + float n_v = nslis / float(n_horizontal); + n_vertical = internal::round_up(n_v); + } + } + + } // end of namespace mln::debug::internal + + + template <typename I> + image2d<mln_value(I)> + slices_2d(const Image<I>& input_, + float ratio_hv, // horizontal / vertical + const mln_value(I)& bg) + { + trace::entering("debug::slices_2d"); + mlc_equal(mln_pset(I), box3d)::check(); + + const I& input = exact(input_); + mln_precondition(input.is_valid()); + mln_precondition(ratio_hv > 0.f); + + unsigned n_horizontal, n_vertical; + internal::slices2d_helper(input.nslices(), input.nrows(), input.ncols(), + ratio_hv, + n_horizontal, n_vertical); + mln_assertion(n_horizontal * n_vertical >= input.nslices()); + + image2d<mln_value(I)> output = slices_2d(input, n_horizontal, n_vertical, bg); + + trace::exiting("debug::slices_2d"); + return output; + } + + # endif // ! MLN_INCLUDE_ONLY } // end of namespace mln::debug Index: tests/debug/slices_2d.cc --- tests/debug/slices_2d.cc (revision 3218) +++ tests/debug/slices_2d.cc (working copy) @@ -28,6 +28,8 @@ /// \file tests/debug/slices_2d.cc /// /// Tests on mln::debug::slices_2d. +/// +/// \todo Add extra tests... #include <mln/debug/slices_2d.hh> #include <mln/debug/iota.hh> @@ -37,7 +39,10 @@ { using namespace mln; - image3d<int> vol(5, 2, 3); + { + point3d p_orig(-1, -2, -3); + box3d b(p_orig, p_orig + dpoint3d(4, 1, 2)); + image3d<int> vol(b); // 5 x 2 x 3 debug::iota(vol); // 1 2 3 @@ -65,8 +70,31 @@ // 25 26 27 -1 -1 -1 // 28 29 30 -1 -1 -1 - mln_assertion(ima.at_(0,0) == 1); - mln_assertion(ima.at_(5,2) == 30); - mln_assertion(ima.at_(5,5) == -1); + mln_assertion(ima(ima.domain().pmin()) == 1); + mln_assertion(ima(ima.domain().pmax()) == -1); + + } + + + // Tests with ratio. + + { + int bg = 0; + image3d<int> vol(1, 1, 1); + image2d<int> ima; + float ratio; + + ratio = 1.f; + ima = debug::slices_2d(vol, ratio, bg); + mln_assertion(ima.nrows() == 1 && ima.ncols() == 1); + + ratio = 0.00001f; + ima = debug::slices_2d(vol, ratio, bg); + mln_assertion(ima.nrows() == 1 && ima.ncols() == 1); + + ratio = 100000.f; + ima = debug::slices_2d(vol, ratio, bg); + mln_assertion(ima.nrows() == 1 && ima.ncols() == 1); + } }