Novel Method for Virtual Restoration of Cultural Relics with Complex Geometric Structure Based on Multiscale Spatial Geometry

Hou, Miaole; Su, Yang; Hu, Yungang; Wu, Yulin; Jiang, Lili; Zhao, Sizhong; Wei, Putong

doi:10.3390/ijgi7090353

Cited by 30 publications

(19 citation statements)

References 11 publications

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“…However, the explosive growth of data poses specific challenges to data analysis and processing capabilities. There are still bottlenecks in transforming data into more general information or knowledge to serve management departments, research institutions, museum industry, education, and the public related to cultural heritage (Hou et al, 2018). The application of digital technology in urban villages still has problems such as low information integration and weak information.…”

Section: Introductionmentioning

confidence: 99%

Proceedings of the 27th Conference on Computer Aided Architectural Design Research in Asia (CAADRIA) [Volume 1]

2022

CAADRIA Proceedings

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The work collected in these volumes has been produced during extraordinary circumstances, as the Covid-19 pandemic has continued to impact working and living conditions. Papers have been written, reviewed and edited throughout lockdowns, challenging family situations and health crises. The high number of submissions and quality of the papers is a testament to the resilience and strength of the CAADRIA community.The papers in this publication have been selected through a two-stage, doubleblind peer review process. All reviews and papers have been evaluated by the Paper Selection Committee. After receiving an initial 488 abstract submissions, a final set of 150 full papers has been selected for publication. We thank all authors for their contributions to the process and congratulate the accepted paper authors.The papers in these proceedings are specifically selected for their contribution to this year's conference theme, following the conference organisers' call for authors to position their work in relation to the United Nations Sustainable Development Goals (SDGs). As the world is experiencing the increasing impacts of climate change, there is an urgent need to reflect on the potential of the latest research in architecture, urbanism and construction to address these global challenges.Our special thanks go out to our more than 180 international reviewers, who volunteered their valuable time and effort. We also thank the organising team in Sydney for developing the 2022 CAADRIA Conference as a strong collaborative effort between academic institutions, industry and practice. We thank Gabriel Wurzer for his support during the proceedings' final production stage, and for facilitating their publication via the open access database CumInCAD.org. Finally, we sincerely thank the CAADRIA community for offering us the honour to serve as members of the paper selection committee for Post-Carbon, the 27 th International CAADRIA Conference 2022.

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Section: Introductionmentioning

confidence: 99%

Proceedings of the 27th Conference on Computer Aided Architectural Design Research in Asia (CAADRIA) [Volume 1]

2022

CAADRIA Proceedings

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“…In particular, when a cultural artifact loses its historical value or changes its shape, the restoration effort focuses on recovering the entire or partial shape of a certain period via thorough historical research and consultation with experts [17][18][19]. The restoration of a cultural artifact is usually realized using a manual method that relies on conservators' intuition and techniques [20,21].…”

Section: Introductionmentioning

confidence: 99%

Noncontact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

Hong

et al. 2020

Herit Sci

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Three-dimensional (3D) digital technology is an essential conservation method that complements the traditional restoration technique of cultural artifacts. In this study, 3D scanning, virtual restoration modeling, and 3D printing were used as a noncontact approach for restoring a damaged stone-seated Bodhisattva (stone Buddha statue). First, a 3D model with an average point density of 0.2 mm was created by integrating the fixed high-precision scanning of the exterior and the handheld mid-precision scanning of the interior excavated hole. Using a 3D deterioration map of the stone Buddha statue, the area of the missing parts was measured to be 400.1 cm2 (5.5% of the total area). Moreover, 257.1 cm2 (64.2% of the missing part area) of four parts, including the head, surrounding area of the Baekho, right ear, and right eye, for which symmetry was applicable for modeling or there could be ascertainable historical evidence for the total missing parts, was selected for restoration. The virtual restoration of the missing parts of the stone Buddha statue was performed using a haptic modeling system in the following order. First, the location of the three fragments detached from the head was determined. Next, a reference model was selected, and its symmetrization and modification with respect to the original model were conducted. Further, estimation modeling and outer shape description were achieved through historical research and consultation with experts. The heuristic-based assembly suitability of the created virtual restoration model (461 cm3) was verified by design mockup printing and digital–analog simulation. In particular, to address assembly interference, the interface surface was modified and reprocessed several times. Accordingly, the volume of the final design mockup decreased by 5.2% (437 cm3). Photopolymerization 3D printing technology was used for the actual restoration of the stone Buddha statue, and considering the surface roughness, the layer thickness of the material used for restoration was set at 0.10 mm. Finally, the surface of the printed output was colored to prevent yellowing and joined to the missing parts of the stone Buddha statue. This study presents a remarkable case of shifting from the traditional manual-contact method to the contactless digital method for restoring artifacts and is expected to largely contribute to increasing the usability of digital technologies in the restoration of cultural artifacts.

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“…Traditionally, functional repair and aesthetic restoration are undertaken to recover the original form of damaged cultural artifacts [5,6]; recently, various conservation methods using advanced technologies and new materials are being applied in the process of restoring damaged cultural artifacts [7][8][9][10]. In particular, when a cultural artifact loses its historical value and shape, the restoration effort focuses on recovering the whole or partial shape of a certain period by thorough historical research and consultation with experts [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Non-contact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

Hong

et al. 2020

Preprint

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Three-dimensional (3D) digital technology is one of the most essential conservation methods that complements the traditional technique of the restoration of cultural artifacts. In this study, 3D scanning, virtual restoration modeling, and 3D printing were used as a non-contact approach for the restoration of a damaged stone seated Bodhisattva (stone Buddha statue). First, a three-dimensional model with an average point density of 0.2 mm was created by integrating the fixed high-precision scanning of the exterior and the handheld mid-precision scanning of the interior excavated hole. Through a 3D deterioration map of the stone Buddha statue, the area of the missing parts was measured as 400.1 cm 2 (5.5% of the total area). Moreover, 257.1 cm 2 (64.2% of the missing part area) of four parts such as the head, the surrounding area of the Baekho, the right ear, and the right eye, for which symmetry was applicable for modeling or there could be ascertainable historical evidence for the total missing parts, was selected for restoration. The virtual restoration of the missing parts of the stone Buddha statue was performed using a haptic modeling system in the following order. First, the location of the three fragments detached from the head was determined. Next, the reference model was selected, and its symmetrization and modification with respect to the original were conducted. Also, estimation modeling and outer shape description were performed through historical research and consultation with experts. The created virtual-restoration model’s (461 cm 3 ) heuristic-based assembly suitability was verified by design mock-up printing and digital–analog simulation. In particular, to address the assembly interference, the interface surface was modified and reprocessed several times. Accordingly, the final design mock-up’s volume size was decreased by 5.2% (437 cm 3 ). Photopolymerization 3D printing technology was used for the actual restoration of the stone Buddha statue and the layer thickness of the material used was set as 0.10 mm considering the surface roughness. Finally, the surface of the printed output was colored to prevent yellowing and joined to the missing part of the stone Buddha statue. This study presents a great case to shift from the traditional manual-contact method to the contactless digital method for the restoration of artifacts and is expected to largely contribute to increasing the usability of digital technologies in the restoration of cultural artifacts.

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Novel Method for Virtual Restoration of Cultural Relics with Complex Geometric Structure Based on Multiscale Spatial Geometry

Cited by 30 publications

References 11 publications

Proceedings of the 27th Conference on Computer Aided Architectural Design Research in Asia (CAADRIA) [Volume 1]

Proceedings of the 27th Conference on Computer Aided Architectural Design Research in Asia (CAADRIA) [Volume 1]

Noncontact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

Non-contact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

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