[Olena-patches] 4392: src/text_in_photo.cc: Improve results quality.

--- scribo/ChangeLog | 4 ++ scribo/src/text_in_photo.cc | 109 +++++++++++++++++++++++++++++++++--------- 2 files changed, 89 insertions(+), 24 deletions(-) diff --git a/scribo/ChangeLog b/scribo/ChangeLog index 854e523..472640e 100644 --- a/scribo/ChangeLog +++ b/scribo/ChangeLog @@ -1,5 +1,9 @@ 2009-08-24 Guillaume Lazzara &lt;lazzara(a)lrde.epita.fr&gt; + * src/text_in_photo.cc: Improve results quality. + +2009-08-24 Guillaume Lazzara &lt;lazzara(a)lrde.epita.fr&gt; + * filter/small_object_groups.hh: New filter. 2009-08-24 Guillaume Lazzara &lt;lazzara(a)lrde.epita.fr&gt; diff --git a/scribo/src/text_in_photo.cc b/scribo/src/text_in_photo.cc index d13d741..d51ba37 100644 --- a/scribo/src/text_in_photo.cc +++ b/scribo/src/text_in_photo.cc @@ -23,6 +23,7 @@ // exception does not however invalidate any other reasons why the // executable file might be covered by the GNU General Public License. +#include <libgen.h> #include <iostream> #include <mln/core/image/image2d.hh> @@ -35,13 +36,21 @@ #include <mln/math/min.hh> +#include <mln/literal/colors.hh> +#include <mln/value/rgb8.hh> + +#include <mln/draw/box.hh> + #include <scribo/extract/primitive/objects.hh> #include <scribo/text/grouping/group_with_single_left_link.hh> #include <scribo/text/grouping/group_with_single_right_link.hh> #include <scribo/text/grouping/group_from_double_link.hh> +#include <scribo/text/grouping/group_from_single_link.hh> +#include <scribo/text/grouping/internal/have_link_valid.hh> #include <scribo/filter/small_objects.hh> #include <scribo/filter/thin_objects.hh> #include <scribo/filter/thick_objects.hh> +#include <scribo/filter/small_object_groups.hh> #include <scribo/make/debug_filename.hh> #include <scribo/debug/save_bboxes_image.hh> @@ -62,12 +71,12 @@ int main(int argc, char* argv[]) using namespace scribo; using namespace mln; - scribo::make::internal::debug_filename_prefix = "photo"; + scribo::make::internal::debug_filename_prefix = argv[2]; if (argc != 3) return scribo::debug::usage(argv, "Find text in a binarized photo.", - "input.pbm output.ppm", + "input.pbm output_dir", args_desc, "A color image where the text is \ highlighted."); @@ -78,46 +87,98 @@ highlighted."); io::pbm::load(input, argv[1]); typedef image2d<value::label_16> L; + + /// Finding objects. value::label_16 nobjects; - object_image(L) objects = scribo::extract::primitive::objects(input, c8(), nobjects); + object_image(L) + objects = scribo::extract::primitive::objects(input, c8(), nobjects); + + /// First filtering. object_image(L) filtered_objects = scribo::filter::small_objects(objects, 6); filtered_objects - = scribo::filter::thin_objects(filtered_objects, 3); + = scribo::filter::thin_objects(filtered_objects, 1); filtered_objects = scribo::filter::thick_objects(filtered_objects, - math::min(input.ncols(), input.nrows()) / 6); - + math::min(input.ncols(), input.nrows()) / 5); + /// Grouping potential objects mln::util::array<unsigned> left_link - = text::grouping::group_with_single_left_link(objects, 30); + = text::grouping::group_with_single_left_link(filtered_objects, 30); mln::util::array<unsigned> right_link - = text::grouping::group_with_single_right_link(objects, 30); + = text::grouping::group_with_single_right_link(filtered_objects, 30); + +#ifndef NOUT std::cout << "BEFORE - nobjects = " << nobjects << std::endl; -// scribo::debug::save_linked_bboxes_image(input, -// filtered_textbboxes, left_link, right_link, -// literal::red, literal::cyan, literal::yellow, -// literal::green, -// scribo::make::debug_filename("links.ppm")); -// -// scribo::debug::save_bboxes_image(input, filtered_textbboxes.bboxes(), -// literal::red, -// scribo::make::debug_filename("test_graph_filtered_text.ppm")); + scribo::debug::save_linked_bboxes_image(input, + filtered_objects, + left_link, right_link, + literal::red, literal::cyan, + literal::yellow, + literal::green, + scribo::make::debug_filename("links.ppm")); +#endif + + // Trying to group objects + mln::util::array<unsigned> parent_link; + text::grouping::group_from_double_link(filtered_objects, + left_link, right_link, + parent_link); + + // Remove objects part of groups with less than 3 objects. + mln::util::array<bool> + to_be_kept = filter::small_object_groups(parent_link, 3); + + + // FOR DEBUGGING PURPOSE. + image2d<value::rgb8> decision_image = data::convert(value::rgb8(), input); + + + for (unsigned i = 1; i < to_be_kept.size(); ++i) + { + if (!to_be_kept(i)) + mln::draw::box(decision_image, filtered_objects.bbox(i), literal::red); + else + mln::draw::box(decision_image, filtered_objects.bbox(i), literal::green); + } + // END OF DEBUG + + + filtered_objects.relabel(to_be_kept); + + + /// Objects have been removed we need to update object links again. + /// This time a single link is enough since non-wanted objects have + /// been removed. + left_link + = text::grouping::group_with_single_left_link(filtered_objects, 30); + + + + /// Grouping objects again. object_image(L) grouped_objects - = text::grouping::group_from_double_link(filtered_objects, left_link, right_link); + = text::grouping::group_from_single_link(filtered_objects, left_link); + +#ifndef NOUT + /// FOR DEBUG PURPOSE. + for (unsigned i = 1; i < grouped_objects.nlabels(); ++i) + mln::draw::box(decision_image, grouped_objects.bbox(i), literal::blue); + io::ppm::save(decision_image, scribo::make::debug_filename("decision_image.ppm")); + std::cout << "AFTER - nobjects = " << grouped_objects.nlabels() << std::endl; +#endif + + io::ppm::save(mln::labeling::colorize(value::rgb8(), + grouped_objects, + grouped_objects.nlabels()), +// "/dev/null"); + scribo::make::debug_filename("out.ppm")); -// scribo::debug::save_bboxes_image(input, grouped_textbboxes.bboxes(), -// literal::red, -// scribo::make::debug_filename("test_graph_grouped_text.ppm")); -// - io::ppm::save(mln::labeling::colorize(value::rgb8(), grouped_objects, grouped_objects.nlabels()), - argv[2]); trace::exiting("main"); } -- 1.5.6.5