[Olena-patches] 2601: Get and display character bboxes.

--- ChangeLog | 6 ++ milena/sandbox/scribo/demat.hh | 118 +++++++++++++++++++++++++++++----------- 2 files changed, 92 insertions(+), 32 deletions(-) diff --git a/ChangeLog b/ChangeLog index 442b848..091cbe8 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,11 @@ 2008-17-07 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + Get and display character bboxes. + * milena/sandbox/scribo/demat.hh: update. + Does not create text bboxes yet. + +2008-17-07 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + Add "essential" headers. * milena/mln/essential/1d.hh, * milena/mln/essential/2d.hh, diff --git a/milena/sandbox/scribo/demat.hh b/milena/sandbox/scribo/demat.hh index 7a35ee9..742143d 100644 --- a/milena/sandbox/scribo/demat.hh +++ b/milena/sandbox/scribo/demat.hh @@ -32,31 +32,48 @@ # include <mln/core/image/image_if.hh> # include <mln/core/image/sub_image.hh> +# include <mln/core/image/cast_image.hh> # include <mln/core/alias/neighb2d.hh> # include <mln/core/var.hh> +# include <mln/core/routine/clone.hh> +# include <mln/core/routine/ops.hh> # include <mln/core/site_set/p_vaccess.hh> +# include <mln/accu/bbox.hh> + # include <mln/binarization/threshold.hh> -# include <mln/morpho/hit_or_miss.hh> -# include <mln/level/fill.hh> + # include <mln/border/fill.hh> + +# include <mln/convert/to.hh> +# include <mln/convert/to_fun.hh> + +# include <mln/debug/println.hh> + +# include <mln/draw/box.hh> + +# include <mln/estim/nsites.hh> + # include <mln/io/pbm/load.hh> # include <mln/io/pgm/load.hh> # include <mln/io/pbm/save.hh> # include <mln/io/pgm/save.hh> -# include <mln/debug/println.hh> -# include <mln/morpho/opening.hh> -# include <mln/trait/value_.hh> -# include <mln/value/int_u8.hh> -# include <mln/level/paste.hh> + # include <mln/labeling/blobs.hh> +# include <mln/labeling/compute.hh> + # include <mln/level/fill.hh> +# include <mln/level/paste.hh> + +# include <mln/morpho/hit_or_miss.hh> +# include <mln/morpho/opening.hh> + # include <mln/pw/all.hh> -# include <mln/convert/to_fun.hh> -# include <mln/geom/bbox.hh> -# include <mln/labeling/compute.hh> -# include <mln/accu/bbox.hh> +# include <mln/util/array.hh> + +# include <mln/value/int_u16.hh> +# include <mln/value/rgb8.hh> namespace scribo { @@ -64,43 +81,78 @@ namespace scribo namespace internal { - void filter_image(mln::image2d<bool>& ima, - const mln::image2d<bool>& filter, - unsigned bbox_larger) - { - using namespace mln; - using value::int_u8; + using namespace mln; + using value::int_u16; - typedef image2d<int_u8> I; - typedef mln_accu_with_(accu::meta::bbox, mln_psite_(I)) A; - typedef util::array<A::result> boxes_t; + util::array<box2d> + component_boxes(const image2d<bool>& filter) + { - int_u8 nlabels; - I lbl = labeling::blobs(filter, c4(), nlabels); + int_u16 nlabels; + image2d<int_u16> lbl = labeling::blobs(filter, c4(), nlabels); - boxes_t boxes = labeling::compute(accu::meta::bbox(), lbl, nlabels); + return labeling::compute(accu::meta::bbox(), lbl, nlabels); + } - for (unsigned i = 1; i <= nlabels; ++i) + void erase_boxes(image2d<bool>& ima, + const util::array<box2d>& boxes, + unsigned bbox_larger) + { + for (unsigned i = 1; i <= boxes.nelements(); ++i) level::paste(pw::cst(false) - | boxes[i].to_larger(bbox_larger), - ima); + | boxes[i].to_larger(bbox_larger), + ima); } - void remove_tables(mln::image2d<bool>& in, unsigned h, unsigned w, unsigned n) + + std::pair<util::array<box2d>, + util::array<box2d> > + extract_tables(image2d<bool>& in, unsigned h, unsigned w, unsigned n) { - using namespace mln; + typedef image2d<int_u16> I; + typedef accu::bbox<mln_psite_(I)> A; + typedef util::array<mln_result_(A)> boxes_t; // Lignes verticales win::rectangle2d vwin(h, w); image2d<bool> vfilter = morpho::opening(in, vwin); io::pbm::save(vfilter, "./table-vfilter.pbm"); - filter_image(in, vfilter, n); + boxes_t vboxes = component_boxes(vfilter); + erase_boxes(in, vboxes, n); // Lignes horizontales win::rectangle2d hwin(w, h); image2d<bool> hfilter = morpho::opening(in, hwin); io::pbm::save(hfilter, "./table-hfilter.pbm"); - filter_image(in, hfilter, n); + boxes_t hboxes = component_boxes(hfilter); + erase_boxes(in, hboxes, n); + + return std::make_pair(vboxes, hboxes); + } + + void + extract_text(image2d<bool>& in) + { + typedef image2d<int_u16> I; + typedef util::array<box2d> boxes_t; + + boxes_t tboxes = component_boxes(in); + + //FIXME: don't know how to clone and convert to image<int> properly + // \{ + I ima(in.domain()); + level::paste(in, ima); + level::paste(pw::cst(100) + | (in | (pw::value(in) == pw::cst(true))).domain(), ima); + // \} + + for (int i = 1; i < tboxes.nelements(); ++i) + if (estim::nsites(tboxes[i]) < 40) + level::paste(pw::cst(false) | tboxes[i], ima); + else + draw::box(ima, tboxes[i], 150u); + + io::pgm::save(ima, "./text.pgm"); } } // end of namespace scribo::internal @@ -111,7 +163,7 @@ namespace scribo void demat(char *argv[]) { using namespace mln; - using value::int_u8; + border::thickness = 0; //Useful debug variables unsigned h = atoi(argv[2]); @@ -122,9 +174,11 @@ namespace scribo image2d<bool> in; io::pbm::load(in, argv[1]); - internal::remove_tables(in, h, w, n); + internal::extract_tables(in, h, w, n); io::pbm::save(in, "./table-filtered.pbm"); + + internal::extract_text(in); } } // end of namespace scribo -- 1.5.6.5