Add a new tool for global thresholding.

	* src/binarization/Makefile.am: Add a new target.

	* src/binarization/global_threshold.cc: New.

scribo/ChangeLog

+2011-10-14  Guillaume Lazzara  <z@lrde.epita.fr>
+
+	Add a new tool for global thresholding.
+
+	* src/binarization/Makefile.am: Add a new target.
+
+	* src/binarization/global_threshold.cc: New.
+
 2011-10-14  Guillaume Lazzara  <z@lrde.epita.fr>
 
 	* tests/binarization/global_threshold.cc: Fix test.

scribo/src/binarization/Makefile.am

@@ -41,6 +41,7 @@ ppm_sauvola_ms_split_SOURCES = ppm_sauvola_ms_split.cc
 if HAVE_MAGICKXX
 
   noinst_PROGRAMS +=  			\
+   global_threshold			\
    sauvola_debug 			\
    sauvola_ms_debug
 
@@ -52,6 +53,12 @@ if HAVE_MAGICKXX
    sauvola_ms_split
 
 
+  global_threshold_SOURCES  = global_threshold.cc
+  global_threshold_CPPFLAGS = $(AM_CPPFLAGS) 		\
+		  	      $(MAGICKXX_CPPFLAGS)
+  global_threshold_LDFLAGS  = $(AM_LDFLAGS) 		\
+		              $(MAGICKXX_LDFLAGS)
+
 
   otsu_SOURCES  = otsu.cc
   otsu_CPPFLAGS = $(AM_CPPFLAGS) 		\

scribo/src/binarization/global_threshold.cc

+// Copyright (C) 2011 EPITA Research and Development Laboratory (LRDE)
+//
+// This file is part of Olena.
+//
+// Olena is free software: you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation, version 2 of the License.
+//
+// Olena is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
+//
+// As a special exception, you may use this file as part of a free
+// software project without restriction.  Specifically, if other files
+// instantiate templates or use macros or inline functions from this
+// file, or you compile this file and link it with other files to produce
+// an executable, this file does not by itself cause the resulting
+// executable to be covered by the GNU General Public License.  This
+// exception does not however invalidate any other reasons why the
+// executable file might be covered by the GNU General Public License.
+
+#include <mln/core/image/image2d.hh>
+#include <mln/value/int_u8.hh>
+#include <mln/io/magick/load.hh>
+#include <mln/io/pbm/save.hh>
+#include <mln/data/transform.hh>
+#include <mln/fun/v2v/rgb_to_luma.hh>
+
+#include <scribo/binarization/global_threshold.hh>
+#include <scribo/debug/option_parser.hh>
+#include <scribo/debug/logger.hh>
+
+static const scribo::debug::arg_data arg_desc[] =
+{
+  { "input.*", "An image." },
+  { "threshold_value", "Global threshold to apply." },
+  { "output.pbm", "A binary image." },
+  {0, 0}
+};
+
+
+// --enable/disable-<name>
+static const scribo::debug::toggle_data toggle_desc[] =
+{
+  // name, description, default value
+  {0, 0, false}
+};
+
+
+// --<name> <args>
+static const scribo::debug::opt_data opt_desc[] =
+{
+  // name, description, arguments, check args function, number of args, default arg
+  { "debug-prefix", "Enable debug image outputs. Prefix image name with that "
+    "given prefix.", "<prefix>", 0, 1, 0 },
+  { "verbose", "Enable verbose mode", 0, 0, 0, 0 },
+  {0, 0, 0, 0, 0, 0}
+};
+
+
+
+int main(int argc, char *argv[])
+{
+  using namespace mln;
+
+  scribo::debug::option_parser options(arg_desc, toggle_desc, opt_desc);
+
+  if (!options.parse(argc, argv))
+    return 1;
+
+  // Enable debug output.
+  if (options.is_set("debug-prefix"))
+  {
+    scribo::debug::logger().set_filename_prefix(options.opt_value("debug-prefix").c_str());
+    scribo::debug::logger().set_level(scribo::debug::All);
+  }
+
+  Magick::InitializeMagick(*argv);
+
+  trace::entering("main");
+
+  bool verbose = options.is_set("verbose");
+  unsigned threshold = atoi(options.arg("threshold_value"));
+
+  if (verbose)
+    std::cout << "Using threshold=" << threshold << std::endl;
+
+  image2d<value::rgb8> input;
+  io::magick::load(input, options.arg("input.*"));
+
+  // Convert to Gray level image.
+  image2d<value::int_u8>
+    input_1_gl = data::transform(input, mln::fun::v2v::rgb_to_luma<value::int_u8>());
+
+  image2d<bool> out = scribo::binarization::global_threshold(input_1_gl, threshold);
+
+  io::pbm::save(out, options.arg("output.pbm"));
+
+  trace::exiting("main");
+}