- Olena - LRE

Possible errata in Olena/Milena tutorial
by Cristián Canivell Gutiérrez (UPM) 30 Nov '11

30 Nov '11

Good night, I am currently starting to develop with olena/milena and I was following the tutorial when I found something that puzzled me: 63 image2d<value::rgb8> lena; 64 io::ppm::load(lena, MLN_IMG_DIR "/small.ppm"); 65 66 std::cout << geom::min_row(lena) << ' ' << geom::max_row(lena) << '\n'; 67 std::cout << geom::min_col(lena) << ' ' << geom::max_col(lena) << '\n'; 68 69 for (def::coord row = geom::min_row(lena); row < geom::max_row(lena); ++row) 70 for (def::coord col = geom::min_row(lena); col < geom::max_col(lena); ++col) 71 if (((row + col) % 2) == 0) 72 opt::at(lena, row, col) = literal::green; 73 74 io::ppm::save(lena, "./lena_chess.ppm"); The definition of geom::min/max_row/col its that it gives you the image limits, so I should get lena's image in a chess pattern. Strangely as it may look, it happens to not fill the right and bottom edges as you can see in the picture: [image: image.png] I think there is something wrong in the tutorial as the loop should have as upper limit row/col *<=* geom::max_row/col instead of *=* http://www.lrde.epita.fr/dload/olena/2.0/doc/milena/user-refman-html/d3/dfe… The thing is that in all the tutorials the limit is set as =, so it is either a bug in milena's function or in the tutorial (or in my computer ;) ) Best regards -- Cristián Canivell Gutiérrez UPM Facultad de Informática

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Fwd: Re: Problem make Scribo
by Guillaume Lazzara 29 Nov '11

29 Nov '11

Hello, I forward your message to olena mailing-list for the record and I prepare an answer for you. Guillaume -------- Original Message -------- Subject: Re: [Olena] Problem make Scribo Date: Tue, 29 Nov 2011 10:26:28 +0100 From: Mikado Mikado <mikados.mikados(a)gmail.com> To: Guillaume Lazzara <lazzara(a)lrde.epita.fr> Hi, thanks for reply. I use your fix, and now give me this error: I try: ~olena-2.0/_build/scribo $ make And get this: /*In file included from ../../../../scribo/scribo/toolchain/internal/content_in_doc_functor.hh:65:0, from ../../../../scribo/demo/viewer/process.hh:22, from ../../../../scribo/demo/viewer/runner.cc:26: ../../../../scribo/scribo/text/recognition.hh: En la función ‘void scribo::text::recognition(scribo::line_set<L>&, const char*)’: ../../../../scribo/scribo/text/recognition.hh:112:7: error: ‘TessBaseAPI’ no se ha declarado ../../../../scribo/scribo/text/recognition.hh:174:12: error: ‘TessBaseAPI’ no se ha declarado ../../../../scribo/scribo/text/recognition.hh: En la función ‘void scribo::text::recognition(const mln::Image<I>&, const char*, const string&)’: ../../../../scribo/scribo/text/recognition.hh:220:7: error: ‘TessBaseAPI’ no se ha declarado ../../../../scribo/scribo/text/recognition.hh:248:17: error: ‘TessBaseAPI’ no se ha declarado make[3]: *** [scribo_viewer-runner.o] Error 1 make[3]: se sale del directorio «/home/user/Descargas/olena-2.0/_build/scribo/demo/viewer» make[2]: *** [all] Error 2 make[2]: se sale del directorio «/home/user/Descargas/olena-2.0/_build/scribo/demo/viewer» make[1]: *** [all-recursive] Error 1 make[1]: se sale del directorio «/home/user/Descargas/olena-2.0/_build/scribo/demo» make: *** [all-recursive] Error 1*/ Is other error, i try find error documentation and forums...but nothing, i use Ubuntu 11.10 and g++ 4.6.1 Any idea? Thanks 2011/11/25 Guillaume Lazzara <lazzara(a)lrde.epita.fr <mailto:lazzara@lrde.epita.fr>> Hi, On 24/11/2011 17:58, Mikado Mikado wrote: With this code in terminal: olena2.0/_build$ ./configure --enable-scribo olena2.0/_build$ make For install Scribo module, but i get this error: ../../../../milena/mln/canvas/browsing/snake_generic.hh:76:14: nota: ‘const struct mln::canvas::browsing::snake_generic_t’ no tiene constructor por defecto proporcionado por el usuario make[1]: *** [pgm_global_threshold_auto.o] Error 1 make: *** [all-recursive] Error 1 I have Ubuntu 11.10 32 bits. Anyone can help me? Thanks for your report. Ubuntu 11.10 provides g++ 4.6.1 which changed few things about initialization of global structures/classes. This is a known issue which can be avoided easily. I have just added a "known issues" section in the download page explaining the workaround. You can find it below. Thanks for your interest in Scribo and Olena. Sincerely, Guillaume ------------- Compilation issues may be encountered with g++ 4.6.0 and 4.6.1 (especially on Ubuntu 11.10). Here is an example of the possible error : ../../../../olena/milena/mln/canvas/browsing/snake_generic.hh:90:29: error: uninitialized const ‘mln::canvas::browsing::snake_generic’ [-fpermissive] ../../../../olena/milena/mln/canvas/browsing/snake_generic.hh:76:14: note: ‘const struct mln::canvas::browsing::snake_generic_t’ has no user-provided default constructor Many non-relevant warnings may also arise. A simple solution is to add CXXFLAGS to configure script with the following argument : %begin bash% ./configure CXXFLAGS="-fpermissive -Wunused-but-set-variable" %end% Otherwise, using a different version of g++ would also fix this issue without specifying anything to configure.

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Re: [Olena] stat::max usage
by Guillaume Lazzara 29 Nov '11

29 Nov '11

On 28/11/2011 10:48, Guillaume Lazzara wrote: > > This bug is now referenced here : https://trac.lrde.org/olena/ticket/247 > Bug fixed with patch 7876a2ce362a03e89fc494def140d0bb0c6d654f. It is now integrated in the 'next' branch. Regards, Guillaume

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Re: [Olena] stat::max usage
by Guillaume Lazzara 28 Nov '11

28 Nov '11

Hi David, On 25/11/2011 16:09, David Coeurjolly wrote: > Is there a hidden (and undocumented AFAIK) requirement on the template parameter to be "unsigned scalar" ? Actually, it seems to be a wrong behavior in Olena, your example is correct. accu::stat::max accumulator is initialized using mln_min(double) in your case. However, it seems that instead of returning the effective negative minimum double value, it returns the minimum positive double value which is not expected. This bug is now referenced here : https://trac.lrde.org/olena/ticket/247 We are running the tests to check if it breaks anything. Thanks for your report. Regards, Guillaume

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stat::max usage
by David Coeurjolly 25 Nov '11

25 Nov '11

hi, I'm having issues with the stat::max accumulator. Is it the correct way to it ? : int main() { mln::accu::stat::max<double> mm; mm.init(); mm.take(-0.02); mm.take(-0.92); mm.take(-0.03); std::cout<<" max= "<<mm.to_result()<<std::endl; } In many situations (w/o init, w/o 'to_result() method in the ostream), I always get a wrong value (2.22^-308, which seems to be min_val for positive double). Is there a hidden (and undocumented AFAIK) requirement on the template parameter to be "unsigned scalar" ? regards dav ---------------- David Coeurjolly - Directeur de recherche CNRS CNRS, LIRIS-UMR 5205 Université de Lyon Batiment Nautibus 43 boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France Tel : (+33) [0]4.72.44.82.40 Fax : (+33) [0]4.72.43.15.36 http://liris.cnrs.fr/david.coeurjolly

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Re: [Olena] Problem make Scribo
by Guillaume Lazzara 25 Nov '11

25 Nov '11

Hi, On 24/11/2011 17:58, Mikado Mikado wrote: > With this code in terminal: > > olena2.0/_build$ ./configure --enable-scribo > olena2.0/_build$ make > > For install Scribo module, but i get this error: > ../../../../milena/mln/canvas/browsing/snake_generic.hh:76:14: nota: > ‘const struct mln::canvas::browsing::snake_generic_t’ no tiene > constructor por defecto proporcionado por el usuario > make[1]: *** [pgm_global_threshold_auto.o] Error 1 > make: *** [all-recursive] Error 1 > > I have Ubuntu 11.10 32 bits. > > Anyone can help me? Thanks for your report. Ubuntu 11.10 provides g++ 4.6.1 which changed few things about initialization of global structures/classes. This is a known issue which can be avoided easily. I have just added a "known issues" section in the download page explaining the workaround. You can find it below. Thanks for your interest in Scribo and Olena. Sincerely, Guillaume ------------- Compilation issues may be encountered with g++ 4.6.0 and 4.6.1 (especially on Ubuntu 11.10). Here is an example of the possible error : ../../../../olena/milena/mln/canvas/browsing/snake_generic.hh:90:29: error: uninitialized const ‘mln::canvas::browsing::snake_generic’ [-fpermissive] ../../../../olena/milena/mln/canvas/browsing/snake_generic.hh:76:14: note: ‘const struct mln::canvas::browsing::snake_generic_t’ has no user-provided default constructor Many non-relevant warnings may also arise. A simple solution is to add CXXFLAGS to configure script with the following argument : %begin bash% ./configure CXXFLAGS="-fpermissive -Wunused-but-set-variable" %end% Otherwise, using a different version of g++ would also fix this issue without specifying anything to configure.

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Problem make Scribo
by Mikado Mikado 24 Nov '11

24 Nov '11

Hi, i follow this instructions: http://www.lrde.epita.fr/dload/olena/2.0/README-2.0 With this code in terminal: olena2.0/_build$ ./configure --enable-scribo olena2.0/_build$ make For install Scribo module, but i get this error: ../../../../milena/mln/canvas/browsing/snake_generic.hh:76:14: nota: ‘const struct mln::canvas::browsing::snake_generic_t’ no tiene constructor por defecto proporcionado por el usuario make[1]: *** [pgm_global_threshold_auto.o] Error 1 make: *** [all-recursive] Error 1 I have Ubuntu 11.10 32 bits. Anyone can help me? Thanks

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Olena 2.0 released
by Roland Levillain 21 Sep '11

21 Sep '11

The Olena Team is proud to announce the release of Olena 2.0. Olena is a platform dedicated to image processing and pattern recognition. Its core component is a generic and efficient C++ library called Milena. Milena provides a framework to implement simple, fast, safe, reusable and extensible image processing tool chains. The library provides many ready-to-use image data structures (regular 1D, 2D, 3D images, graph-based images, etc.) and algorithms. Milena's algorithms are built upon classical entities from the image processing field (images, points/sites, domains, neighborhoods, etc.). This design allows image processing developers and practitioners to easily understand, modify, develop and extend new algorithms while retaining the core traits of Milena: genericity and efficiency. On top of Milena, the Olena platform also features optional modules such as Swilena, a component exposing Milena to other languages thanks to the Simplified Wrapper and Interface Generator (SWIG); and the SCRIBO module for Document Image Analysis (see below). The Olena platform is Free Software. It is distributed under the conditions of the GNU General Public License (GPL) version 2. See the file COPYING shipped with the Olena distribution. Release notes are available at: http://olena.lrde.epita.fr/Olena200 You can download packages of the Olena 2.0 distribution here: http://www.lrde.epita.fr/dload/olena/2.0/olena-2.0.tar.gz (38 MB) http://www.lrde.epita.fr/dload/olena/2.0/olena-2.0.tar.bz2 (32 MB) The SHA1 digests of theses packages are: d3a829fa56bff4edbca58af0c9a39c9569820c60 olena-2.0.tar.gz 0abae2a9bc751a8fb33acacd2dbe70635d5dd00b olena-2.0.tar.bz2 Here is a list of major changes since Olena 1.0: * The biggest addition to Olena available in this new version is the SCRIBO module for Document Image Analysis (DIA). This module has been developed in the context of the SCRIBO project (see http://www.scribo.ws) The SCRIBO module provides software building blocks to create DIA tool chains, including routines for preprocessing steps (such as binarization, show-through removal, deskew and denoising), text lines identification, non-text objects retrieval (tables, pictures, separators, etc.), line reconstruction (rebuilding separators and tables), Optical Character Recognition (OCR) integration and document reconstruction (converting a document to XML, PDF and/or HTML outputs). Dedicated data structures are also provided to handle intermediate results. Some Graphical User Interface (GUI) programs based on the Qt toolkit are also proposed. * Several compilation issues have been addressed. * New algorithms (especially in mathematical morphology), canvases (or algorithmic patterns) and efficient algorithm variants have been added to Milena, as well as some new data types (see NEWS for more details). * More conversion routines, especially regarding color values. * Support for I/O routines (both built-in and depending on third-party packages) has been improved. * Various bug fixes and improvements. The file NEWS, included in the archive, contains a more complete list of user-visible changes. Please report any problem by mail to <olena-bugs(a)lrde.epita.fr>. -- Roland Levillain - LRDE/EPITA - A3SI/ESIEE/LIGM/UMLV-Paris Est EPITA Research and Development Laboratory (LRDE) 14-16, rue Voltaire - FR-94276 Le Kremlin-Bicêtre Cedex - France Phone: +33 1 53 14 59 45 - Fax: +33 1 53 14 59 22 - www.lrde.epita.fr

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Re: [Olena] Question à propos de l'utilisation des opérations de type "distance" implémentées dans Milena
by Guillaume Lazzara 21 Jan '11

21 Jan '11

Bonjour, On 01/19/11 15:59, nicolas parmentier wrote: > Par contre je ne vois pas comment je peux obtenir le résultat > "distance_from_seed_pt.png". > Il s'agit du calcul de champ de distance à partir du point supérieur > gauche dans le domaine valide (en noir). > Auriez vous une idée de la façon dont je peux procéder afin d'obtenir ce > résultat ? L'algorithme transform::distance_geodesic est paramétré en interne par un objet qui calcul une carte des distances aux objets (en blanc) dans le fond (en noir). Il utilise pour cela la routine qui s'appelle canvas::distance_geodesic et le paramètre est la classe transform::internal::distance_functor. En créant une nouvelle classe similaire à transform::internal::distance_functor, en modifiant certaines méthodes et en l'utilisant avec canvas::distance_geodesic, il est possible d'implémenter des variantes du calcul de distance géodésique. Dans votre cas, il faudrait modifier les routines utilisées dans l'initialisation de la carte de distance. Les fichiers concernés sont : - mln/canvas/distance_geodesic.hh - mln/transform/internal/distance_functor.hh - mln/transform/distance_geodesic.hh N'hésitez pas à revenir vers nous si vous avez d'autres questions. Cordialement, -- Guillaume Lazzara EPITA Research and Development Laboratory (LRDE) 14-16 rue Voltaire F-94276 Le Kremlin-Bicetre France phone +33 1 53 14 59 39 - fax +33 1 53 14 59 22

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Question à propos de l'utilisation des opérations de type "distance" implémentées dans Milena
by nicolas parmentier 19 Jan '11

19 Jan '11

Bonjour, Dans le cadre de mes recherches, je pense éventuellement utiliser votre libraire "Milena" afin de traiter une série d'images issues de tomographies. Votre librairie semble, en effet, bien appropriée pour les traitements que je souhaite effectuer sur mes données. J'ai cependant un petit souci concernant une opération particulière : l'évaluation de la distance dans une partie de l'image à partir d'un point du domaine. Pourriez vous m'aider sur l'exemple suivant : Soit le domaine binaire : "Domain.png" (annexé en pièce jointe) J'arrive à réaliser le champ de distance "distance_field.png" sans aucun souci grâce à une commande de type : " mln::image2d<int_u8> distance_field = mln::transform::distance_geodesic(Domain, mln::c4(), int_u8(100)); " Par contre je ne vois pas comment je peux obtenir le résultat "distance_from_seed_pt.png". Il s'agit du calcul de champ de distance à partir du point supérieur gauche dans le domaine valide (en noir). Auriez vous une idée de la façon dont je peux procéder afin d'obtenir ce résultat ? Merci de l'aide que vous voudriez bien m'apporter, Bien à vous, N. Parmentier -- --------------------------------------------------------------------------- Institut de Mécanique, Matériaux et Génie Civil (iMMC) Université Catholique de Louvain, Bâtiment Simon Stevin, local b.055 Place du levant n°2, 1348 Louvain-la-Neuve, Belgique Tel : +32 (0)10.47.22.20 email: Nicolas.Parmentier(a)uclouvain.be ---------------------------------------------------------------------------

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