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Herit."],"published-print":{"date-parts":[[2011,4]]},"abstract":"<jats:p>The dichotomy between full detail representation and the efficient management of data digitization is still a big issue in the context of the acquisition and visualization of 3D objects, especially in the field of the cultural heritage. Modern scanning devices enable very detailed geometry to be acquired, but it is usually quite hard to apply these technologies to large artifacts. In this article we present a project aimed at virtually reconstructing the impressive (7\u00d711 m.) portal of the Ripoll Monastery, Spain. The monument was acquired using triangulation laser scanning technology, producing a dataset of 2212 range maps for a total of more than 1 billion triangles. All the steps of the entire project are described, from the acquisition planning to the final setup for dissemination to the public. We show how time-of-flight laser scanning data can be used to speed-up the alignment process. In addition we show how, after creating a model and repairing imperfections, an interactive and immersive setup enables the public to navigate and display a fully detailed representation of the portal. This article shows that, after careful planning and with the aid of state-of-the-art algorithms, it is now possible to preserve and visualize highly detailed information, even for very large surfaces.<\/jats:p>","DOI":"10.1145\/1957825.1957827","type":"journal-article","created":{"date-parts":[[2011,4,12]],"date-time":"2011-04-12T12:03:38Z","timestamp":1302609818000},"page":"1-20","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":16,"title":["Multiscale acquisition and presentation of very large artifacts"],"prefix":"10.1145","volume":"3","author":[{"given":"Marco","family":"Callieri","sequence":"first","affiliation":[{"name":"Visual Computing Lab, ISTI-CNR, Pisa, Italy"}]},{"given":"Antoni","family":"Chica","sequence":"additional","affiliation":[{"name":"Universitat Politecnica de Catalunya, Barcelona, Spain"}]},{"given":"Matteo","family":"Dellepiane","sequence":"additional","affiliation":[{"name":"Visual Computing Lab, ISTI-CNR, Pisa, Italy"}]},{"given":"Isaac","family":"Besora","sequence":"additional","affiliation":[{"name":"Universitat Politecnica de Catalunya, Barcelona, Spain"}]},{"given":"Massimiliano","family":"Corsini","sequence":"additional","affiliation":[{"name":"Visual Computing Lab, ISTI-CNR, Pisa, Italy"}]},{"given":"Jordi","family":"Moy\u00e9s","sequence":"additional","affiliation":[{"name":"Universitat Politecnica de Catalunya, Barcelona, Spain"}]},{"given":"Guido","family":"Ranzuglia","sequence":"additional","affiliation":[{"name":"Visual Computing Lab, ISTI-CNR, Pisa, Italy"}]},{"given":"Roberto","family":"Scopigno","sequence":"additional","affiliation":[{"name":"Visual Computing Lab, ISTI-CNR, Pisa, Italy"}]},{"given":"Pere","family":"Brunet","sequence":"additional","affiliation":[{"name":"Universitat Politecnica de Catalunya, Barcelona, Spain"}]}],"member":"320","published-online":{"date-parts":[[2011,4,11]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8659.2007.01078.x"},{"volume-title":"Proceedings of the International Workshop 3D-ARCH'05\u20143D Virtual Reconstruction and Visualization of Complex Architectures.","author":"Balzani M.","key":"e_1_2_1_2_1","unstructured":"Balzani , M. , Callieri , M. , Caputo , G. , Cignoni , P. , Dellepiane , M. , Montani , C. , Pingi , P. , Ponchio , F. , Scopigno , R. , Tomasi , A. , and Uccelli , F . 2005. Using multiple scanning technologies for the 3d acquisition of torcello's basilica . In Proceedings of the International Workshop 3D-ARCH'05\u20143D Virtual Reconstruction and Visualization of Complex Architectures. Balzani, M., Callieri, M., Caputo, G., Cignoni, P., Dellepiane, M., Montani, C., Pingi, P., Ponchio, F., Scopigno, R., Tomasi, A., and Uccelli, F. 2005. Using multiple scanning technologies for the 3d acquisition of torcello's basilica. In Proceedings of the International Workshop 3D-ARCH'05\u20143D Virtual Reconstruction and Visualization of Complex Architectures."},{"key":"e_1_2_1_3_1","first-page":"972","article-title":"Integration of laser scanning and close-range photogrammetry the last decade and beyond","volume":"35","author":"Beraldin J.-A.","year":"2004","unstructured":"Beraldin , J.-A. 2004 . Integration of laser scanning and close-range photogrammetry the last decade and beyond . Proc. IAPRS 35 , 5, 972 -- 983 . Beraldin, J.-A. 2004. Integration of laser scanning and close-range photogrammetry the last decade and beyond. Proc. IAPRS 35, 5, 972--983.","journal-title":"Proc. IAPRS"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.5555\/2384301.2384308"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/1095878.1095883"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/1137856.1137906"},{"volume-title":"Proceedings of the 13th Eurographics Workshop on Rendering (RENDERING TECHNIQUES-02)","author":"Botsch M.","key":"e_1_2_1_7_1","unstructured":"Botsch , M. , Wiratanaya , A. , and Kobbelt , L . 2002. Efficient high quality rendering of point sampled geometry . In Proceedings of the 13th Eurographics Workshop on Rendering (RENDERING TECHNIQUES-02) . S. Gibson and P. Debevec, Eds., Eurographics Association, 53--64. Botsch, M., Wiratanaya, A., and Kobbelt, L. 2002. Efficient high quality rendering of point sampled geometry. In Proceedings of the 13th Eurographics Workshop on Rendering (RENDERING TECHNIQUES-02). S. Gibson and P. Debevec, Eds., Eurographics Association, 53--64."},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00607-009-0052-9"},{"key":"e_1_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cag.2008.05.004"},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.5555\/2384436.2384441"},{"key":"e_1_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cag.2006.02.015"},{"key":"e_1_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1109\/MCG.2008.20"},{"volume-title":"Proceedings of the Conference on IEEE Visualization. 27--35","author":"Cignoni P.","key":"e_1_2_1_13_1","unstructured":"Cignoni , P. , Ganovelli , F. , Gobbetti , E. , Marton , F. , Ponchio , F. , and Scopigno , R . 2005. Batched multi triangulation . In Proceedings of the Conference on IEEE Visualization. 27--35 . Cignoni, P., Ganovelli, F., Gobbetti, E., Marton, F., Ponchio, F., and Scopigno, R. 2005. Batched multi triangulation. 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Virtual restoration of cultural heritage through real-time 3d models projection . In Proceedings of the 6th International Symposium on Virtual Reality, Archeology and Cultural Heritage (VAST). Peral, R., Sagasti, D., and Sillaurren, S. 2005. Virtual restoration of cultural heritage through real-time 3d models projection. In Proceedings of the 6th International Symposium on Virtual Reality, Archeology and Cultural Heritage (VAST)."},{"key":"e_1_2_1_27_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8659.2005.00877.x"},{"key":"e_1_2_1_28_1","doi-asserted-by":"publisher","DOI":"10.5555\/1889712.1889738"},{"key":"e_1_2_1_29_1","doi-asserted-by":"publisher","DOI":"10.1145\/1551676.1551678"},{"key":"e_1_2_1_30_1","doi-asserted-by":"publisher","DOI":"10.1145\/344779.344940"},{"volume-title":"Proceedings of the 3rd Eurographics Symposium on Geometry Processing (SGP'05)","author":"Sander P. V.","key":"e_1_2_1_31_1","unstructured":"Sander , P. V. and Mitchell , J. L . 2005. Progressive buffers: view-dependent geometry and texture lod rendering . In Proceedings of the 3rd Eurographics Symposium on Geometry Processing (SGP'05) . Eurographics Association, 129. Sander, P. V. and Mitchell, J. L. 2005. Progressive buffers: view-dependent geometry and texture lod rendering. In Proceedings of the 3rd Eurographics Symposium on Geometry Processing (SGP'05). Eurographics Association, 129."},{"key":"e_1_2_1_32_1","doi-asserted-by":"publisher","DOI":"10.5555\/2384436.2384445"},{"key":"e_1_2_1_33_1","doi-asserted-by":"publisher","DOI":"10.1109\/VISUAL.2003.1250407"},{"volume-title":"Proceedings of the 10th International Conference on Virtual Systems and Multimedia (VSMM'04)","author":"Valzano V.","key":"e_1_2_1_34_1","unstructured":"Valzano , V. , a Beraldin , J. , Picard , M. , El -hakim, S. F., and Godin , G . 2004. Virtual heritage: The cases of the byzantine crypt of santa cristina and temple c of selinunte . 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