[Olena-patches] 2790: Add tesseract support for Scribo.

* scribo/demat.hh: Use tesseract and store the result in an image of char. --- milena/sandbox/ChangeLog | 8 ++ milena/sandbox/scribo/demat.hh | 140 ++++++++++++++++++++++++++-------------- 2 files changed, 99 insertions(+), 49 deletions(-) diff --git a/milena/sandbox/ChangeLog b/milena/sandbox/ChangeLog index 6f31c88..e1bd1f1 100644 --- a/milena/sandbox/ChangeLog +++ b/milena/sandbox/ChangeLog @@ -1,3 +1,11 @@ +2008-11-03 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + + Add tesseract support for Scribo. + + * scribo/demat.hh: Use tesseract and store the result in an image of + char. + + 2008-11-03 Ugo Jardonnet &lt;jardonnet(a)lrde.epita.fr&gt; INIM: Move classif work in the inim directory. diff --git a/milena/sandbox/scribo/demat.hh b/milena/sandbox/scribo/demat.hh index ff332d3..f03b8bd 100644 --- a/milena/sandbox/scribo/demat.hh +++ b/milena/sandbox/scribo/demat.hh @@ -29,6 +29,7 @@ # define DEMAT_HH_ # include <libgen.h> +# include <sstream> # include <mln/core/image/image2d.hh> # include <mln/core/image/image1d.hh> @@ -53,6 +54,7 @@ # include <mln/convert/to_fun.hh> # include <mln/debug/println.hh> +# include <mln/debug/colorize.hh> # include <mln/draw/box.hh> @@ -62,6 +64,7 @@ # include <mln/io/pbm/save.hh> # include <mln/io/ppm/save.hh> # include <mln/io/pgm/save.hh> +# include <mln/io/txt/save.hh> # include <mln/labeling/blobs.hh> # include <mln/labeling/compute.hh> @@ -90,6 +93,8 @@ # include <mln/win/hline2d.hh> # include <mln/win/vline2d.hh> +#include <tesseract/baseapi.h> + namespace scribo { @@ -103,39 +108,82 @@ namespace scribo char *input_file = 0; int dbg_file_id = 0; - std::string output_file(const char *name) + std::string output_file(const char *name, unsigned file_id) { - std::string str = ""; -// str += dbg_file_id; -// str += "-"; -// str += input_file; -// str += "-"; - str += name; - return str; + std::ostringstream os; + os << "./" + << file_id + << "_" + << input_file + << "_" + << name; + return os.str(); } void draw_component_boxes(image2d<rgb8>& output, const util::array<box2d>& boxes) { for (unsigned i = 1; i < boxes.nelements(); ++i) if (boxes[i].is_valid()) + { + output(boxes[i].center()) = literal::red; draw::box(output, boxes[i], literal::red); + } } template <typename V> void save_lbl_image(const image2d<V>& lbl, unsigned nlabels, - const char *filename) + const char *filename, unsigned file_id) { - image2d<rgb8> output(lbl.domain()); + image2d<rgb8> output = debug::colorize<image2d<rgb8>, image2d<V> >(lbl, nlabels); + io::ppm::save(output, output_file(filename, file_id)); + } - fun::i2v::array<rgb8> f(nlabels + 1); - f(0) = literal::black; - for (unsigned i = 1; i <= nlabels; ++i) - f(i) = rgb8(255 / ((i % 10) + 1), (100 + i) % 255, (255 + i)%255); - output = level::transform(lbl, f); - io::ppm::save(output, output_file(filename)); + + /// Functions related to Text Recognition. + /// \{ + + void + text_recognition(const image2d<bool>& in, const image2d<int_u16>& lbl, + const util::array<box2d>& tboxes) + { + /// Use txt bboxes here with Tesseract + std::cout << "Text recognition..." << std::endl; + + TessBaseAPI::InitWithLanguage(NULL, NULL, "fra", NULL, false, 0, NULL); + image2d<char> txt(in.domain()); + level::fill(txt, ' '); + + for (unsigned i = 1; i < tboxes.nelements(); ++i) + { + if (tboxes[i].is_valid()) + { + // FIXME: do not create a new image. + image2d<bool> b(tboxes[i], 0); + level::fill(b, false); + level::fill(b, in | (tboxes[i] | (pw::value(lbl) == pw::cst(i)))); + + char* s = TessBaseAPI::TesseractRect( + (unsigned char*) b.buffer(), + sizeof (bool), // Pixel size. + b.ncols() * sizeof (bool), // Row_offset + 0, // Left + 0, // Top + b.ncols(), // n cols + b.nrows()); // n rows + + point2d p = tboxes[i].center(); + p.col() -= (tboxes[i].pmax().col() - tboxes[i].pmin().col()) / 2; + if (s != 0) + debug::put_word(txt, p, s); + free(s); + } + } + io::txt::save(txt, "out.txt"); } + /// \} + /// Functions related to the matrix extraction /// \{ @@ -216,17 +264,17 @@ namespace scribo for (unsigned i = 1; i < in.ncols(); ++i) { if (hend.at(i) > 0) - draw_row(tmp, i, literal::dark_orange); + draw_col(tmp, i, literal::dark_orange); if (vcol.at(i) > 0) - draw_row(tmp, i, literal::dark_orange); + draw_col(tmp, i, literal::dark_orange); } for (unsigned i = 1; i < in.nrows(); ++i) { if (hrow.at(i) > 0) - draw_col(tmp, i, literal::dark_red); + draw_row(tmp, i, literal::dark_red); if (vend.at(i) > 0) - draw_col(tmp, i, literal::dark_red); + draw_row(tmp, i, literal::dark_red); } for (unsigned i = 1; i < tboxes.first.nelements(); ++i) @@ -235,7 +283,7 @@ namespace scribo for (unsigned i = 1; i < tboxes.second.nelements(); ++i) draw_hline(tmp, tboxes.second[i], literal::red); - io::ppm::save(tmp, output_file("matrix.ppm")); + io::ppm::save(tmp, output_file("matrix.ppm", 4)); #endif } @@ -254,7 +302,7 @@ namespace scribo { std::cout << "component boxes" << std::endl; int_u16 nlabels = 0; - image2d<int_u16> lbl = labeling::blobs(filter, c4(), nlabels); + image2d<int_u16> lbl = labeling::blobs(filter, c8(), nlabels); return labeling::compute(accu::meta::bbox(), lbl, nlabels); } @@ -289,12 +337,10 @@ namespace scribo // Lignes verticales std::cout << "Removing vertical lines" << std::endl; win::vline2d vline(l); - io::pbm::save(in, "ero_in_before"); - trace::quiet = false; image2d<bool> vfilter = morpho::erosion(in, vline); #ifndef NOUT - io::pbm::save(vfilter, output_file("table-vfilter.pbm")); + io::pbm::save(vfilter, output_file("table-vfilter.pbm", 1)); #endif boxes_t vboxes = component_boxes(vfilter); @@ -307,7 +353,7 @@ namespace scribo image2d<bool> hfilter = morpho::erosion(in, hline); #ifndef NOUT - io::pbm::save(hfilter, output_file("table-hfilter.pbm")); + io::pbm::save(hfilter, output_file("table-hfilter.pbm", 2)); #endif boxes_t hboxes = component_boxes(hfilter); @@ -318,7 +364,7 @@ namespace scribo image2d<rgb8> tmp = clone(output); draw_component_boxes(tmp, vboxes); draw_component_boxes(tmp, hboxes); - io::ppm::save(tmp, output_file("table-filtered.ppm")); + io::ppm::save(tmp, output_file("table-filtered.ppm", 3)); #endif return std::make_pair(vboxes, hboxes); @@ -364,11 +410,11 @@ namespace scribo util::array<mln_result(accu_count_t)> nsitecomp = labeling::compute(accu_count_t(), lbl, nlabels); - std::cout << "nlabels with small comps = " << nlabels - << " == " << nsitecomp.nelements() << std::endl; V ncomp = 0; + fun::i2v::array<V> f(nsitecomp.nelements()); f(0) = 0; + for (unsigned i = 1; i <= nlabels; ++i) { if (nsitecomp[i] < min_comp_size) @@ -377,15 +423,11 @@ namespace scribo f(i) = ++ncomp; } - std::cout << "f.size() =" << f.size() - << " - nsitecomp.nelements() =" << nsitecomp.nelements() - << std::endl; lbl = level::transform(lbl, f); nlabels = ncomp; #ifndef NOUT - std::cout << "nlabels = " << nlabels << std::endl; - save_lbl_image(lbl, nlabels, "lbl-small-comps-removed.pgm"); + save_lbl_image(lbl, nlabels, "lbl-small-comps-removed.pgm", 6); #endif } @@ -405,7 +447,7 @@ namespace scribo lbl = level::transform(lbl, left_link); #ifndef NOUT - save_lbl_image(lbl, ncomp, "lbl-grouped-boxes.pgm"); + save_lbl_image(lbl, ncomp, "lbl-grouped-boxes.pgm", 7); #endif util::array<box2d> result; @@ -421,10 +463,10 @@ namespace scribo /// the current bbox. void update_link(fun::i2v::array<int_u16>& left_link, image2d<int_u16>& lbl, const point2d& p, const point2d& c, - unsigned i, unsigned dmax) + unsigned i, int dmax) { - if (lbl.domain().has(p) && lbl(p) != 0 && lbl(p) != i - && (p.col() - c.col()) < dmax) + if (lbl.domain().has(p) && lbl(p) != 0u && lbl(p) != i + && (math::abs(p.col() - c.col())) < dmax) { if (left_link(lbl(p)) == lbl(p) && most_left(left_link, i) != lbl(p)) left_link(lbl(p)) = i; @@ -452,14 +494,14 @@ namespace scribo for (unsigned i = 1; i <= ncomp; ++i) { unsigned midcol = (cboxes[i].pmax().col() - cboxes[i].pmin().col()) / 2; - unsigned dmax = midcol + bbox_distance; + int dmax = midcol + bbox_distance; point2d c = cboxes[i].center(); /// First site on the right of the central site point2d p(c.row(), c.col() + 1); // FIXME: Lemmings with a condition on the distance => write a special version? - while (lbl.domain().has(p) && (lbl(p) == 0 || lbl(p) == i) - && (p.col() - c.col()) < dmax) + while (lbl.domain().has(p) && (lbl(p) == 0u || lbl(p) == i) + && math::abs(p.col() - c.col()) < dmax) ++p.col(); update_link(left_link, lbl, p, c, i, dmax); @@ -470,6 +512,7 @@ namespace scribo util::array<box2d> extract_text(image2d<bool>& in, + image2d<int_u16>& lbl, image2d<rgb8>& output, unsigned bbox_distance, unsigned min_comp_size) @@ -482,7 +525,7 @@ namespace scribo // Find character bboxes. V nlabels; - image2d<V> lbl = labeling::blobs(in, c4(), nlabels); + lbl = labeling::blobs(in, c8(), nlabels); //Remove small components. remove_small_comps_i2v(lbl, nlabels, min_comp_size); @@ -492,7 +535,7 @@ namespace scribo #ifndef NOUT image2d<rgb8> tmp = clone(output); draw_component_boxes(tmp, cboxes); - io::ppm::save(tmp, output_file("character-bboxes.ppm")); + io::ppm::save(tmp, output_file("character-bboxes.ppm", 5)); #endif //merge_bboxes(cboxes, lbl, nlabels); @@ -531,7 +574,7 @@ namespace scribo //Load image image2d<bool> in; io::pbm::load(in, argv[1]); - in = logical::not_(in); + logical::not_inplace(in); image2d<rgb8> output = level::convert(rgb8(), in); @@ -543,15 +586,14 @@ namespace scribo internal::extract_matrix(in, tblboxes); } + image2d<value::int_u16> lbl; util::array<box2d> tboxes = - internal::extract_text(in, output, bbox_distance, min_comp_size); + internal::extract_text(in, lbl, output, bbox_distance, min_comp_size); internal::draw_component_boxes(output, tboxes); - io::ppm::save(output, internal::output_file("out")); + io::ppm::save(output, internal::output_file("out.ppm", 8)); - /// Use txt bboxes here with Tesseract - /// for (i = 1; i < tboxes.nelements(); ++i) - /// tesseract(in | tboxes[i]) + internal::text_recognition(in, lbl, tboxes); } } // end of namespace scribo -- 1.5.6.5