URL: https://svn.lrde.epita.fr/svn/oln/trunk/milena/sandbox ChangeLog: 2009-03-13 Etienne FOLIO &lt;folio(a)lrde.epita.fr&gt; Classification of 2D images with their respective RGB histograms. * sandbox/folio/mln/histo/classify_with_histo_rgb.hh: New algorithm that classifies an image 2d with its rgb histogram. * sandbox/folio/mln/histo/compute_histo_rgb.hh: Use component of value's trait. * sandbox/folio/test/histo/classify_with_histo_rgb.cc: New test for the classification of 2d images with their respective RGB histograms. * sandbox/folio/test/histo/compute_histo_rgb.cc: Correct an include. * sandbox/folio/test/histo/compute_histo_rgb_from_ppm.cc: New test for building an histogram with a ppm image. --- mln/histo/classify_with_histo_rgb.hh | 40 +++++++++++++ mln/histo/compute_histo_rgb.hh | 11 ++- test/histo/classify_with_histo_rgb.cc | 89 +++++++++++++++++++++++++++++++ test/histo/compute_histo_rgb.cc | 2 test/histo/compute_histo_rgb_from_ppm.cc | 30 ++++++++++ 5 files changed, 166 insertions(+), 6 deletions(-) Index: trunk/milena/sandbox/folio/test/histo/compute_histo_rgb_from_ppm.cc =================================================================== --- trunk/milena/sandbox/folio/test/histo/compute_histo_rgb_from_ppm.cc (revision 0) +++ trunk/milena/sandbox/folio/test/histo/compute_histo_rgb_from_ppm.cc (revision 3530) @@ -0,0 +1,30 @@ +/*! + * \file compute_histo_rgb_from_ppm.cc + * \author etiennefolio &lt;ornthalas(a)gmail.com&gt; + */ + +#include <iostream> +#include <mln/debug/println.hh> + +#include <mln/io/ppm/load.hh> +#include <mln/io/ppm/save.hh> +#include <mln/level/stretch.hh> + +#include "../../mln/histo/compute_histo_rgb.hh" + +int main() +{ + using namespace mln; + + // build test image + image2d<value::rgb8> ima; + io::ppm::load(ima, "../../../../img/lena.ppm"); + + // let's run ! + image3d<value::int_u8> out = histo::compute_histo_rgb<value::int_u8>(ima); + + // output ? + // FIXME: need projection to visualize. + + return 0; +} Index: trunk/milena/sandbox/folio/test/histo/compute_histo_rgb.cc =================================================================== --- trunk/milena/sandbox/folio/test/histo/compute_histo_rgb.cc (revision 3529) +++ trunk/milena/sandbox/folio/test/histo/compute_histo_rgb.cc (revision 3530) @@ -7,7 +7,7 @@ #include <mln/debug/println.hh> #include <mln/literal/all.hh> -#include "../../histo/compute_histo_rgb.hh" +#include "../../mln/histo/compute_histo_rgb.hh" int main() { Index: trunk/milena/sandbox/folio/test/histo/classify_with_histo_rgb.cc =================================================================== --- trunk/milena/sandbox/folio/test/histo/classify_with_histo_rgb.cc (revision 0) +++ trunk/milena/sandbox/folio/test/histo/classify_with_histo_rgb.cc (revision 3530) @@ -0,0 +1,89 @@ +/*! + * \file classify_with_histo_rgb.cc + * \author etiennefolio &lt;ornthalas(a)gmail.com&gt; + */ + +#include <iostream> +#include <mln/debug/println.hh> +#include <mln/debug/slices_2d.hh> + +#include <mln/io/ppm/load.hh> +#include <mln/io/ppm/save.hh> +#include <mln/io/pgm/save.hh> +#include <mln/data/fill.hh> +#include <mln/literal/all.hh> + +#include <mln/arith/revert.hh> +#include <mln/core/alias/neighb3d.hh> +#include <mln/morpho/closing/volume.hh> +#include <mln/value/label_8.hh> +#include <mln/morpho/watershed/flooding.hh> + +#include "../../mln/histo/compute_histo_rgb.hh" +#include "../../mln/histo/classify_with_histo_rgb.hh" + +#include <mln/level/transform.hh> + +namespace mln +{ + struct rgb8to6 : Function_v2v< rgb8to6 > + { + typedef value::rgb<6> result; + value::rgb<6> operator()(const value::rgb<8>& c) const + { + value::rgb<6> res(c.red() / 4, c.green() / 4, c.blue() / 4); + return res; + } + }; +} + +int main(int argc, char** argv) +{ + using namespace mln; + + // check arguments + if (argc < 3) + { + std::cerr << "Usage:" << std::endl + << " ./a.out ../../../../lena.ppm 51" << std::endl + << std::endl + << "BTW, the number is the closure's lambda." << std::endl; + exit(1); + } + + typedef value::rgb<6> rgb6; + typedef value::int_u<6> int_u6; + + // build test image + std::cout << " => loading " << argv[1] << "..." << std::endl; + image2d<value::rgb8> lena; + io::ppm::load(lena, argv[1]); + image2d<rgb6> ima = level::transform(lena, rgb8to6()); + + // let's run ! + std::cout << " => computing histogram..." << std::endl; + image3d<unsigned> histo = histo::compute_histo_rgb<unsigned>(ima); + + std::cout << " => computing reverted histogram..." << std::endl; + image3d<unsigned> reverted = arith::revert(histo); + +// std::cout << " => dump it to reverted.pgm..." << std::endl; +// image2d<int_u6> d1 = debug::slices_2d(reverted, 1.f, 0); +// io::pgm::save(d1, "reverted.pgm"); + + std::cout << " => computing closure..." << std::endl; + image3d<unsigned> closed = morpho::closing::volume(reverted, c6(), atoi(argv[2])); + + std::cout << " => computing watershed..." << std::endl; + value::label_8 nbasin; + image3d<value::label_8> labels = morpho::watershed::flooding(closed, c6(), nbasin); + std::cout << "found " << nbasin << " labels" << std::endl; + + std::cout << " => computing output labelized image..." << std::endl; + image2d<value::label_8> out = histo::classify_with_histo_rgb(ima, labels); + + std::cout << " => saving out.ppm..." << std::endl; + io::pgm::save(out, "out.ppm"); + + return 0; +} Index: trunk/milena/sandbox/folio/mln/histo/classify_with_histo_rgb.hh =================================================================== --- trunk/milena/sandbox/folio/mln/histo/classify_with_histo_rgb.hh (revision 0) +++ trunk/milena/sandbox/folio/mln/histo/classify_with_histo_rgb.hh (revision 3530) @@ -0,0 +1,40 @@ +/*! + * \file classify_with_histo.hh + * \author etiennefolio &lt;ornthalas(a)gmail.com&gt; + */ + + +#ifndef CLASSIFY_WITH_HISTO_HH_ +# define CLASSIFY_WITH_HISTO_HH_ + +namespace mln +{ + + namespace histo + { + + template <typename T, typename C> + image2d<C> + classify_with_histo_rgb(image2d<T>& ref, + image3d<C>& regions) + { + image2d<C> out; + initialize(out, ref); + + mln_fwd_piter(image2d<T>) p(ref.domain()); + for_all(p) + { + // get 3d point in regions image. + point3d p3 = point3d(ref(p).red(), ref(p).green(), ref(p).blue()); + + out(p) = regions(p3); // copy the label in out's pixel. + } + + return out; + } + + } // end of namespace mln::histo + +} // end of namespace mln + +#endif /* !CLASSIFY_WITH_HISTO_HH_ */ Index: trunk/milena/sandbox/folio/mln/histo/compute_histo_rgb.hh =================================================================== --- trunk/milena/sandbox/folio/mln/histo/compute_histo_rgb.hh (revision 3529) +++ trunk/milena/sandbox/folio/mln/histo/compute_histo_rgb.hh (revision 3530) @@ -8,6 +8,7 @@ #include <mln/value/int_u8.hh> #include <mln/value/rgb8.hh> #include <iostream> + namespace mln { namespace histo @@ -17,11 +18,11 @@ image3d<C> compute_histo_rgb(image2d<T> ima) { // out - typedef value::int_u8::enc enc; - image3d<C> out(mln_max(enc) + abs(mln_min(enc)) + 1, - mln_max(enc) + abs(mln_min(enc)) + 1, - mln_max(enc) + abs(mln_min(enc)) + 1); - data::fill(out, mln_min(C)); + typedef typename trait::value_<T>::comp enc; + image3d<C> out(mln_max(enc) + abs(mln_min(enc) + 1), + mln_max(enc) + abs(mln_min(enc) + 1), + mln_max(enc) + abs(mln_min(enc) + 1)); + data::fill(out, 0); // count mln_fwd_piter(image2d<T>) p(ima.domain());