{"id":56228,"date":"2024-04-16T12:34:54","date_gmt":"2024-04-16T11:34:54","guid":{"rendered":"https:\/\/www.he-arc.ch\/?post_type=he-arc_project&#038;p=56228"},"modified":"2024-04-16T13:26:09","modified_gmt":"2024-04-16T12:26:09","slug":"doitr","status":"publish","type":"he-arc_project","link":"https:\/\/www.he-arc.ch\/en\/projets-recherche\/doitr\/","title":{"rendered":"DoITR"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/2024-Projet_DoITR.pdf\">Fiche de valorisation du projet<\/a><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"491\" src=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_metal.jpg\" alt=\"\" class=\"wp-image-56252\" srcset=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_metal.jpg 1000w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_metal-300x147.jpg 300w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_metal-768x377.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Fig. 1\u2009: Impression visuelle sous 48 LEDs d\u2019une armoirie sans modification des param\u00e8tres\u2009: le ternissement rend l\u2019armoirie difficilement lisible (clich\u00e9 \u00e0 gauche)\u2009; m\u00eame impression visuelle avec nuances de gris et intensit\u00e9 mat\u00e9rielle \u00e9lev\u00e9e (clich\u00e9 \u00e0 droite) o\u00f9 les contours sont plus lisibles \u00a9HE Arc CR Ra&amp;D<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Objectifs<\/h2>\n\n\n\n<p>Les m\u00e9thodes d\u2019imagerie sont largement utilis\u00e9es en conservation-restauration, principalement en raison de leur caract\u00e8re non invasif.<br>Parmi les m\u00e9thodes d\u2019imagerie existantes, les conservateurs-restaurateurs privil\u00e9gient les m\u00e9thodes portables, permettant de travailler sur site, sans d\u00e9placement des objets, peu co\u00fbteuses et faciles d\u2019utilisation.<br>La texture de surface des objets plans \u00e0 faible relief (\u00e9cailles de papillons, m\u00e9tal fortement abras\u00e9, surfaces peintes, etc.) est toutefois difficile \u00e0 documenter avec ces m\u00e9thodes classiques.<br>Le projet DoITR vise \u00e0 documenter la surface de ces mat\u00e9riaux en utilisant l\u2019imagerie par transformation de la r\u00e9flectance \u2013 ITR, \u00e0 l\u2019aide d\u2019un mat\u00e9riel robuste (d\u00f4me) et de pallier ces probl\u00e8mes.<br>La m\u00e9thode ITR est une technique d\u2019imagerie qui documente des informations sur la r\u00e9flectance de la surface de l\u2019objet observ\u00e9. Une carte de texture polynomiale (PTM) est compos\u00e9e de plusieurs photographies prises \u00e0 partir d\u2019une position fixe (cam\u00e9ra et objet), la surface de l\u2019objet \u00e9tant \u00e9clair\u00e9e selon diff\u00e9rents angles. \u00c0 l\u2019aide d\u2019un algorithme sp\u00e9cialement d\u00e9velopp\u00e9, un programme informatique synth\u00e9tise les images et compile toutes les informations dans un seul fichier. Un logiciel de visualisation d\u00e9di\u00e9 permet de r\u00e9\u00e9clairer l\u2019objet de mani\u00e8re interactive, r\u00e9v\u00e9lant ainsi les d\u00e9tails de la surface 2D pouvant contenir des informations 3D<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Programme<\/h2>\n\n\n\n<p>Le projet DoITR vise \u00e0 \u00e9valuer les performances d\u2019un d\u00f4me commercial. Afin d\u2019en d\u00e9finir les limites d\u2019utilisation, nous avons choisi d\u2019\u00e9tudier deux probl\u00e9matiques complexes illustrant les difficult\u00e9s de documentation et de suivi d\u2019objets auxquels les conservateurs-restaurateurs sont confront\u00e9s :<\/p>\n\n\n\n<ul>\n<li>Identification des l\u00e9pidochromies<\/li>\n\n\n\n<li>Alt\u00e9ration de d\u00e9cors \u00e0 la surface de pi\u00e8ces en argent<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"310\" src=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_papillon.jpg\" alt=\"\" class=\"wp-image-56250\" srcset=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_papillon.jpg 1000w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_papillon-300x93.jpg 300w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2024\/04\/DoITR_papillon-768x238.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Fig. 2\u2009: Impression visuelle sous 48 LEDs d\u2019un papillon sans modification des param\u00e8tres (clich\u00e9 \u00e0 gauche) et m\u00eame impression visuelle avec modification des param\u00e8tres (clich\u00e9 \u00e0 droite), permettant de mettre en exergue l\u2019\u00e9paisseur des ailes <br>par rapport au corps dessin\u00e9 \u00a9HE Arc CR Ra&amp;D<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sultat<\/h2>\n\n\n\n<ul>\n<li>Documentation des deux corpus retenus<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>D\u00e9finition des conditions optimales pour la documentation des mat\u00e9riaux retenus<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>Acquisition et traitement d\u2019une s\u00e9lection des corpus d\u2019objets<\/li>\n<\/ul>\n\n\n\n<p>R\u00e9daction des recommandations d\u2019utilisation incluant l\u2019analyse critique de la technique et la d\u00e9finition d\u2019un protocole d\u2019acquisition et de traitement des donn\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sponsors\">Financement<\/h2>\n\n\n\n<ul>\n<li><\/li>\n<\/ul>\n\n\n\n<ul>\n<li><a href=\"https:\/\/www.he-arc.ch\">Haute \u00c9cole Arc<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Chef de projet<\/h2>\n\n\n\n<p><a href=\"https:\/\/people.he-arc.ch\/contact.php?id=165164581\">Christian Degrigny<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Partenaires<\/h2>\n\n\n\n<ul>\n<li><a href=\"https:\/\/muzoo.ch\/\">MUZOO<\/a><\/li>\n<\/ul>\n\n\n\n<ul>\n<li><\/li>\n<\/ul>\n\n\n\n<ul>\n<li><a href=\"https:\/\/www.lausanne.ch\/vie-pratique\/culture\/musees\/mhl.html\" target=\"_blank\" rel=\"noreferrer noopener\">Mus\u00e9e Historique de Lausanne<\/a><\/li>\n<\/ul>\n","protected":false},"author":38,"featured_media":56258,"template":"","he-arc_domain":[5],"he-arc_project_skill":[],"he-arc_project_year":[44,45],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.13 - 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