{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:34:59Z","timestamp":1750307699275,"version":"3.41.0"},"reference-count":32,"publisher":"Association for Computing Machinery (ACM)","issue":"1","license":[{"start":{"date-parts":[[2009,7,1]],"date-time":"2009-07-01T00:00:00Z","timestamp":1246406400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["J. Comput. Cult. Herit."],"published-print":{"date-parts":[[2009,7]]},"abstract":"<jats:p>In the last few years, the number of projects involving historical reconstruction has increased significantly. Recent technologies have proven a powerful tool for a better understanding of our cultural heritage through which to attain a glimpse of the environments in which our ancestors lived. However, to accomplish such a purpose, these reconstructions should be presented to us as they may really have been perceived by a local inhabitant, according to the illumination and materials used back then and, equally important, the characteristics of the human visual system.<\/jats:p>\n          <jats:p>The human visual system has a remarkable ability to adjust itself to almost all everyday scenarios. This is particularly evident in extreme lighting conditions, such as bright light or dark environments. However, a major portion of the visible spectra captured by our visual system cannot be represented in most display devices. High dynamic range imagery is a field of research which is developing techniques to correct such inaccuracies. This new viewing paradigm is perfectly suited for archaeological interpretation, since its high contrast and chromaticity can present us with an enhanced viewing experience, closer to what an inhabitant of that era may have seen.<\/jats:p>\n          <jats:p>In this article we present a case study of the reconstruction of a Roman site. We generate high dynamic range images of mosaics and frescoes from one of the most impressive monuments in the ruins of Conimbriga, Portugal, an ancient city of the Roman Empire. To achieve the requisite level of precision, in addition to having a precise geometric 3D model, it is crucial to integrate in the virtual simulation authentic physical data of the light used in the period under consideration. Therefore, in order to create a realistic physical-based environment, we use in our lighting simulations real data obtained from simulated Roman luminaries of that time.<\/jats:p>","DOI":"10.1145\/1551676.1551679","type":"journal-article","created":{"date-parts":[[2009,7,21]],"date-time":"2009-07-21T13:32:11Z","timestamp":1248183131000},"page":"1-20","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["High dynamic range\u2014a gateway for predictive ancient lighting"],"prefix":"10.1145","volume":"2","author":[{"given":"Alexandrino","family":"Gon\u00e7alves","sequence":"first","affiliation":[{"name":"Research Center for Informatics and Communications of the Polytechnic Institute of Leiria, Portugal"}]},{"given":"Lu\u00eds","family":"Magalh\u00e3es","sequence":"additional","affiliation":[{"name":"University of Tr\u00e1s-os-Montes and Alto Douro, Institute for Systems and Computer Engineering of Porto, Portugal"}]},{"given":"Jo\u00e3o","family":"Moura","sequence":"additional","affiliation":[{"name":"University of Tr\u00e1s-os-Montes and Alto Douro, Knowledge Engineering and Decision Support Research Center, Portugal"}]},{"given":"Alan","family":"Chalmers","sequence":"additional","affiliation":[{"name":"The Digital Laboratory, WMG, University of Warwick, UK"}]}],"member":"320","published-online":{"date-parts":[[2009,7,23]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"Bogart R. Kainz F. and Hess D. 2003. The OpenEXR file format. Siggraph 2003 Tech.  Bogart R. Kainz F. and Hess D. 2003. The OpenEXR file format. Siggraph 2003 Tech."},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/1108590.1108596"},{"key":"e_1_2_1_3_1","unstructured":"Blake R. and Sekuler R. 1994. Perception 3rd Ed. McGraw-Hill.  Blake R. and Sekuler R. 1994. Perception 3rd Ed. McGraw-Hill."},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/584458.584460"},{"volume-title":"Proceedings of SIGGRAPH'00","author":"Chalmers A.","key":"e_1_2_1_5_1","unstructured":"Chalmers , A. , Green , C. , and Hall , M . 2000. Firelight: Graphics and archaeology . In Proceedings of SIGGRAPH'00 . Chalmers, A., Green, C., and Hall, M. 2000. Firelight: Graphics and archaeology. In Proceedings of SIGGRAPH'00."},{"volume-title":"Monographic museum of Conimbriga","author":"Conimbriga","key":"e_1_2_1_6_1","unstructured":"Conimbriga . 2009. Monographic museum of Conimbriga . http:\/\/www.conimbriga.pt. Conimbriga. 2009. Monographic museum of Conimbriga. http:\/\/www.conimbriga.pt."},{"key":"e_1_2_1_7_1","unstructured":"Correia V. 2003. Conimbriga -- Guia das Ru\u00ednas. Instituto Portugu\u00eas de Museus.  Correia V. 2003. Conimbriga -- Guia das Ru\u00ednas. Instituto Portugu\u00eas de Museus."},{"key":"e_1_2_1_8_1","unstructured":"Correia V. 2004. Perspectivas sobre Conimbriga. \u00c2ncora editora.  Correia V. 2004. Perspectivas sobre Conimbriga. \u00c2ncora editora."},{"key":"e_1_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1145\/513867.513878"},{"volume-title":"30th Anniversary Digital Congress.","author":"Devlin K.","key":"e_1_2_1_10_1","unstructured":"Devlin , K. , Chalmers , A. , and Brown , D. 2002. Predictive lighting and perception in archaeological representations. UNESCO \u201cWorld Heritage in the Digital Age \u201d 30th Anniversary Digital Congress. Devlin, K., Chalmers, A., and Brown, D. 2002. Predictive lighting and perception in archaeological representations. UNESCO \u201cWorld Heritage in the Digital Age\u201d 30th Anniversary Digital Congress."},{"key":"e_1_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1145\/258734.258884"},{"key":"e_1_2_1_13_1","unstructured":"Dolby. 2009. High dynamic range displays. http:\/\/www.dolby.com\/promo\/hdr\/technology.html.  Dolby. 2009. High dynamic range displays. http:\/\/www.dolby.com\/promo\/hdr\/technology.html."},{"volume-title":"Studies in Ancient Technology (vol. VI). Leiden&amp","author":"Forbes R. J.","key":"e_1_2_1_14_1","unstructured":"Forbes , R. J. 1966. Studies in Ancient Technology (vol. VI). Leiden&amp ; Brill , Netherlands . Forbes, R. J. 1966. Studies in Ancient Technology (vol. VI). Leiden&amp;Brill, Netherlands."},{"key":"e_1_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.5555\/2384275.2384293"},{"volume-title":"Proceedings of CAA2003","author":"Gon\u00e7alves A.","key":"e_1_2_1_16_1","unstructured":"Gon\u00e7alves , A. and Mendes , A . 2003. The rebirth of a Roman forum: The case study of the flavian forum of conimbriga . In Proceedings of CAA2003 . Enter the Past-The E-way into the four Dimensions of Cultural Heritage. Gon\u00e7alves, A. and Mendes, A. 2003. The rebirth of a Roman forum: The case study of the flavian forum of conimbriga. In Proceedings of CAA2003. Enter the Past-The E-way into the four Dimensions of Cultural Heritage."},{"key":"e_1_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(01)01304-8"},{"key":"e_1_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1145\/1029949.1029978"},{"volume-title":"11th Eurographics Workshop on Rendering.","author":"Mcnamara A.","key":"e_1_2_1_19_1","unstructured":"Mcnamara , A. , Chalmers , A. , Troscianko T. , and Gilchrist , I . 2000. Comparing real and synthetic scenes using human judgments of lightness . In 11th Eurographics Workshop on Rendering. Mcnamara, A., Chalmers, A., Troscianko T., and Gilchrist, I. 2000. Comparing real and synthetic scenes using human judgments of lightness. In 11th Eurographics Workshop on Rendering."},{"key":"e_1_2_1_20_1","unstructured":"Ministerio de Cultura. 1990. Los Bronces Romanos en Espa\u00f1a. Ministerio de Cultura. Madrid (Spain).  Ministerio de Cultura. 1990. Los Bronces Romanos en Espa\u00f1a. Ministerio de Cultura. Madrid (Spain)."},{"key":"e_1_2_1_21_1","unstructured":"Pedroso R. 1992. \u201cAs pinturas murais in situ\u201d. Ap\u00eandice a Oleiro J. M. B. Conimbriga. Casa dos Repuxos (Conimbriga Museu Monogr\u00e1fico Corpus dos Mosaicos Romanos de Portugal I) 159--166.  Pedroso R. 1992. \u201cAs pinturas murais in situ\u201d. Ap\u00eandice a Oleiro J. M. B. Conimbriga. Casa dos Repuxos (Conimbriga Museu Monogr\u00e1fico Corpus dos Mosaicos Romanos de Portugal I) 159--166."},{"key":"e_1_2_1_22_1","unstructured":"Radforum. 2009. Radiance online forum. http:\/\/www.radiance-online.org.  Radforum. 2009. Radiance online forum. http:\/\/www.radiance-online.org."},{"key":"e_1_2_1_23_1","unstructured":"Radiance. 2009. Home of Radiance. http:\/\/radsite.lbl.gov.  Radiance. 2009. Home of Radiance. http:\/\/radsite.lbl.gov."},{"key":"e_1_2_1_24_1","doi-asserted-by":"publisher","DOI":"10.5555\/2384436.2384468"},{"key":"e_1_2_1_25_1","doi-asserted-by":"crossref","unstructured":"Reinhard E. Ward G. 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Colour rendering of spectra. http:\/\/www.fourmilab.ch\/documents\/specrend.  Walter J. 1996. Colour rendering of spectra. http:\/\/www.fourmilab.ch\/documents\/specrend."},{"volume-title":"Graphics Gems II","author":"Ward G.","key":"e_1_2_1_29_1","unstructured":"Ward , G. 1991. Real pixels . In Graphics Gems II , Academic Press , 80--83. Ward, G. 1991. Real pixels. In Graphics Gems II, Academic Press, 80--83."},{"key":"e_1_2_1_30_1","volume-title":"Proceedings of IS&amp;T\/SID 6th Colour Imaging Conference.","author":"Ward G.","year":"1998","unstructured":"Ward , G. 1998 a. Overcoming gamut and dynamic range limitations in digital images . In Proceedings of IS&amp;T\/SID 6th Colour Imaging Conference. Ward, G. 1998a. Overcoming gamut and dynamic range limitations in digital images. 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