Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement
This paper presents an effective and low-cost approach for the digitisation of a Roman bronze head exhibited at the Santa Giulia Museum in Brescia using close-range photogrammetry. The artefact posed significant challenges due to its dark, reflective exterior surface and its hollow interior, accessi...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2024-12-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://isprs-archives.copernicus.org/articles/XLVIII-2-W8-2024/357/2024/isprs-archives-XLVIII-2-W8-2024-357-2024.pdf |
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| author | L. Perfetti G. P. M. Vassena F. Morandini F. Fassi |
| author_facet | L. Perfetti G. P. M. Vassena F. Morandini F. Fassi |
| author_sort | L. Perfetti |
| collection | DOAJ |
| description | This paper presents an effective and low-cost approach for the digitisation of a Roman bronze head exhibited at the Santa Giulia Museum in Brescia using close-range photogrammetry. The artefact posed significant challenges due to its dark, reflective exterior surface and its hollow interior, accessible only through an 8 cm neck opening. The digitisation had two main objectives: (1) to support restoration activities by accurately measuring the thickness of the bronze cast, and (2) to enhance the artefact's dissemination by producing a web-optimised digital replica.<br />Special emphasis was placed on the survey of the internal surface, achieved using a custom-designed camera probe equipped with a 5 megapixels RGB global shutter camera and LED ring lights. With this setup it was possible to effectively captured the inner geometry using low-cost tools. The internal dataset was connected with the exterior dataset, acquired by a regular DSLR and turntable setup supported by cross-polarization.<br />The processing workflow involved generating a high-resolution mesh model (~80M faces) and computing the cast's thickness using two methods: the M3C2 algorithm and the Shrinking Sphere algorithm, which provided consistent results. Additionally, an optimised low-poly version of the model was created for web sharing. This study highlights the potential of low-cost tailored photogrammetric solutions/workflows to address the complexities of digitising intricate museum artefacts. |
| format | Article |
| id | doaj-art-cdcdcb6b0f9743a39d9066ee88428ba2 |
| institution | Kabale University |
| issn | 1682-1750 2194-9034 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj-art-cdcdcb6b0f9743a39d9066ee88428ba22024-12-14T22:37:35ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342024-12-01XLVIII-2-W8-202435736410.5194/isprs-archives-XLVIII-2-W8-2024-357-2024Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurementL. Perfetti0G. P. M. Vassena1F. Morandini2F. Fassi3Department of Civil Engineering, Architecture, Territory, Environment and Mathematics (DICATAM), Università degli Studi di Brescia, Brescia, ItalyDepartment of Civil Engineering, Architecture, Territory, Environment and Mathematics (DICATAM), Università degli Studi di Brescia, Brescia, ItalyFondazione Brescia Musei, Comune di Brescia, Brescia, ItalyDepartment of Architecture, Built environment and Construction engineering (ABC), Politecnico di Milano, Milano, ItalyThis paper presents an effective and low-cost approach for the digitisation of a Roman bronze head exhibited at the Santa Giulia Museum in Brescia using close-range photogrammetry. The artefact posed significant challenges due to its dark, reflective exterior surface and its hollow interior, accessible only through an 8 cm neck opening. The digitisation had two main objectives: (1) to support restoration activities by accurately measuring the thickness of the bronze cast, and (2) to enhance the artefact's dissemination by producing a web-optimised digital replica.<br />Special emphasis was placed on the survey of the internal surface, achieved using a custom-designed camera probe equipped with a 5 megapixels RGB global shutter camera and LED ring lights. With this setup it was possible to effectively captured the inner geometry using low-cost tools. The internal dataset was connected with the exterior dataset, acquired by a regular DSLR and turntable setup supported by cross-polarization.<br />The processing workflow involved generating a high-resolution mesh model (~80M faces) and computing the cast's thickness using two methods: the M3C2 algorithm and the Shrinking Sphere algorithm, which provided consistent results. Additionally, an optimised low-poly version of the model was created for web sharing. This study highlights the potential of low-cost tailored photogrammetric solutions/workflows to address the complexities of digitising intricate museum artefacts.https://isprs-archives.copernicus.org/articles/XLVIII-2-W8-2024/357/2024/isprs-archives-XLVIII-2-W8-2024-357-2024.pdf |
| spellingShingle | L. Perfetti G. P. M. Vassena F. Morandini F. Fassi Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement |
| title_full | Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement |
| title_fullStr | Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement |
| title_full_unstemmed | Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement |
| title_short | Photogrammetric digitisation of a bronze head – Surveying inside and outside for thickness measurement |
| title_sort | photogrammetric digitisation of a bronze head surveying inside and outside for thickness measurement |
| url | https://isprs-archives.copernicus.org/articles/XLVIII-2-W8-2024/357/2024/isprs-archives-XLVIII-2-W8-2024-357-2024.pdf |
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