Research

Open AccessArticle

3D Reconstruction of Celadon from a 2D Image: Application to Path Tracing and VR

by

Seongil Kim

and

Youngjin Park

Appl. Sci. 2023, 13(11), 6848; https://doi.org/10.3390/app13116848 - 05 Jun 2023

Viewed by 620

Abstract

We present a straightforward approach for reconstructing 3D celadon models from a single 2D image. The celadon is a historical example of the surface of revolution. Our approach uses a surface of revolution technique to generate the basic shape of the celadon and [...] Read more.

We present a straightforward approach for reconstructing 3D celadon models from a single 2D image. The celadon is a historical example of the surface of revolution. Our approach uses a surface of revolution technique to generate the basic shape of the celadon and then applies texture mapping to create a realistic appearance. The process involves detecting the contour and corners of the celadon image, determining an axis of revolution, generating a profile curve, and finally constructing a 3D celadon model. Additionally, we create models as triangular meshes at multiple resolutions, employing a B-spline curve as the profile curve. It enhances the adaptability of the models for various purposes. We render various scenes using a path tracer to assess the suitability of the generated 3D celadon models and generate a VR celadon museum with the models. Overall, our approach offers a simple and efficient solution for reconstructing a 3D celadon model, generating VR content, and demonstrating extensive applicability across numerous disciplines. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Use of Cloud-Based Virtual Reality in Chinese Glove Puppetry to Preserve Intangible Cultural Heritage

by

Der-Lor Way

and

Yu-Hsien Wei

Appl. Sci. 2023, 13(9), 5699; https://doi.org/10.3390/app13095699 - 05 May 2023

Viewed by 1124

Abstract

Chinese traditional glove puppetry is a folk art with a long history. It is worth inheriting and safeguarding this distinguished intangible cultural traditional art using virtual reality. With this background, this study integrates the digital resources of glove puppetry from the perspective of [...] Read more.

Chinese traditional glove puppetry is a folk art with a long history. It is worth inheriting and safeguarding this distinguished intangible cultural traditional art using virtual reality. With this background, this study integrates the digital resources of glove puppetry from the perspective of satisfying users’ performance needs. In this study, a multi-user, cloud-based virtual reality glove puppetry system was developed that enhances the classic works of glove puppetry. Each user has a unique perception of the virtual environment and can interact remotely. The system involves human–computer and human–human interactions. This study also describes the design and control of glove puppets. The virtual reality system provides a unique entertainment experience to users of all ages. Through a questionnaire administered to 30 subjects after the user play, this study investigated the operation and experience of this system. According to the research findings, the proposed cloud-based VR system is not only easy to use, but also helps to preserve traditional intangible culture. Our research has high theoretical value and can help preserve traditional glove puppetry. Our cloud-based virtual reality system offers a new application for disseminating and preserving intangible cultural heritage. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Hash Indexing-Based Image Matching for 3D Reconstruction

by

Mingwei Cao

,

Haiyan Jiang

and

Haifeng Zhao

Appl. Sci. 2023, 13(7), 4518; https://doi.org/10.3390/app13074518 - 02 Apr 2023

Viewed by 1036

Abstract

Image matching is a basic task in three-dimensional reconstruction, which, in recent years, has attracted extensive attention in academic and industrial circles. However, when dealing with large-scale image datasets, these methods have low accuracy and slow speeds. To improve the effectiveness of modern [...] Read more.

Image matching is a basic task in three-dimensional reconstruction, which, in recent years, has attracted extensive attention in academic and industrial circles. However, when dealing with large-scale image datasets, these methods have low accuracy and slow speeds. To improve the effectiveness of modern image matching methods, this paper proposes an image matching method for 3D reconstruction. The proposed method can obtain high matching accuracy through hash index in a very short amount of time. The core of hash matching includes two parts: creating the hash table and hash index. The former is used to encode local feature descriptors into hash codes, and the latter is used to search candidates for query feature points. In addition, the proposed method is extremely robust to image scaling and transformation by using various verifications. A comprehensive experiment was carried out using several challenging datasets to evaluate the performance of hash matching. Experimental results show that the HashMatch presents excellent results compared to the state-of-the-art methods in both computational efficiency and matching accuracy. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Investigating a Workflow for Obtaining Physical Models from Digital Twins Obtained through Photogrammetry and TLS: New Ways for a Sustainable Dissemination of Heritage

by

Pablo Alejandro Cruz Franco

,

Adela Rueda Márquez de la Plata

and

María Pérez Sendín

Appl. Sci. 2023, 13(2), 1057; https://doi.org/10.3390/app13021057 - 12 Jan 2023

Cited by 2 | Viewed by 1024

Abstract

The objective of this article is to generate and validate a workflow that allows us to print physical twins (models) from digital twins obtained from unique buildings of our architectural heritage. These physical twins will guarantee the preservation and diffusion of the cultural [...] Read more.

The objective of this article is to generate and validate a workflow that allows us to print physical twins (models) from digital twins obtained from unique buildings of our architectural heritage. These physical twins will guarantee the preservation and diffusion of the cultural asset, and will promote new pedagogical ways to spread the heritage. In addition, these physical cufflinks are an interesting tool to guarantee universal accessibility through low-cost and rapid distribution typological models. We can overcome physical barriers and reach many more users, regardless of their economic, physical, or location conditions. To obtain this workflow, digital twins of architectural elements of high cultural value obtained by photogrammetry or terrestrial laser scanner will be used. The digital twin will be optimized through different platforms, and an optimized exchange file will be generated for its dissemination and printing. A digital platform will be proposed that guarantees the free distribution of these digital twins to any user. Finally, the physical twins will be obtained. For the development of this work, we have chosen to use 3D resin printers with SLA technology (selective laser exposure to light by laser) due to their performance and high quality in the models obtained. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

A Methodical Approach to 3D Scanning of Heritage Objects Being under Continuous Display

by

,

,

,

,

and

Appl. Sci. 2023, 13(1), 441; https://doi.org/10.3390/app13010441 - 29 Dec 2022

Cited by 3 | Viewed by 1224

Abstract

Three dimensional digitization of cultural heritage resources gains a lot of attention from the European Union and the United Nations, which is clearly revealed in current strategic goals and financing perspectives. Existing methodological approaches to 3D scanning in a prevailing number of cases [...] Read more.

Three dimensional digitization of cultural heritage resources gains a lot of attention from the European Union and the United Nations, which is clearly revealed in current strategic goals and financing perspectives. Existing methodological approaches to 3D scanning in a prevailing number of cases assume that the procedure of scanning is performed in places that are closed to tourists, at least for the time of scanning. However, closing an exhibition for tourists or moving an artifact to be scanned is not always possible. Thanks to the long-term experience of the authors with 3D scanning of cultural heritage, the special procedure was designed for small and medium size objects to overcome difficulties expected in such cases. The procedure has been successfully implemented during 3D scanning of objects exhibited in the Silk Road region (on the territory of modern Uzbekistan), as well as objects being parts of wooden sacral architecture of the Maramures region (in Romania). It was revealed that the proposed procedure was successfully allowed to counteract organizational problems during 3D scanning of heritage objects being under continuous display, and that the achieved results of scanning were nevertheless of good quality. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Real-Time Rendering Engines Help Visualize, Model, and Animate Ancient Cities: An Example in Antioch

by

Kayhan Kaplan

Appl. Sci. 2022, 12(23), 12316; https://doi.org/10.3390/app122312316 - 01 Dec 2022

Viewed by 2024

Abstract

This study aimed to revitalize ancient cities’ history, culture, and social life, along with their physical environments, through computer-aided, three-dimensional (3D) images. This study will become an instrument for visualization in 3D ancient cities whose historical remains are not intact and are perhaps [...] Read more.

This study aimed to revitalize ancient cities’ history, culture, and social life, along with their physical environments, through computer-aided, three-dimensional (3D) images. This study will become an instrument for visualization in 3D ancient cities whose historical remains are not intact and are perhaps known only through books, maps, pictures, and inscriptions. Following historical investigations and comparative analyses of similar examples, objects or structures subject to change over centuries, partially damaged, or lost were visualized through the production of models that reflect their original historic design. The images obtained were converted to animations of 3d models with motion, sound, light, and related effects. In addition to animations, this study implemented another technique concerning cities: the Ancient Antioch—the modeled space was installed in a game engine to obtain simultaneous images. Despite certain limitations, the study findings, adequately based on scientific evidence, provide rich visual content for practical use in the three domains of presentation, research, and education. The hope is that this socio-historical, scientific, and esthetic study, established to model, visualize, and animate city life from approximately 1800–2000 years ago, will be instrumental to the further development of its mixed methodologies and provide a new synthetic process for an ongoing feedback loop. Perhaps the most important output of this study was the use of almost all of the images obtained in the Hatay Archaeology Museum. After the final stage of preparation, the presentation of Ancient Antioch is planned to be done in 2023 of March and opened to visitors on special platforms with Unity 3D. An actual excavation area’s data can be constantly modeled and remodeled, thus improving the scientific feasibility, quality, and uniqueness of excavation work and the dissemination of scientific results. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Preparation of 3D Models of Cultural Heritage Objects to Be Recognised by Touch by the Blind—Case Studies

by

Jerzy Montusiewicz

,

Marcin Barszcz

and

Sylwester Korga

Appl. Sci. 2022, 12(23), 11910; https://doi.org/10.3390/app122311910 - 22 Nov 2022

Cited by 6 | Viewed by 1315

Abstract

Providing access to and the protection of cultural goods—intangible and tangible heritage—is carried out primarily by institutions such as museums, galleries or local cultural centres where temporary exhibitions are shown. The international community also attempts to protect architectural objects or entire urban layouts, [...] Read more.

Providing access to and the protection of cultural goods—intangible and tangible heritage—is carried out primarily by institutions such as museums, galleries or local cultural centres where temporary exhibitions are shown. The international community also attempts to protect architectural objects or entire urban layouts, raising their status by inscribing them on the UNESCO World Heritage List. Contemporary museums, however, are not properly prepared to make museum exhibits available to the blind and visually impaired, which is confirmed by both the literature studies on the subject and the occasional solutions that are put in place. The development of various computer graphics technologies allows for the digitisation of cultural heritage objects by 3D scanning. Such a record, after processing, can be used to create virtual museums accessible via computer networks, as well as to make copies of objects by 3D printing. This article presents an example of the use of scanning, modelling and 3D printing to prepare prototypes of copies of museum objects from the Silk Road area, dedicated to blind people and to be recognised by touch. The surface of an object has information about it written in Braille before the copy-making process is initiated. The results of the pilot studies carried out on a group of people with simulated visual impairment and on a person who is blind from birth indicate that 3D models printed on 3D replicators with the fused filament fabrication technology are useful for sharing cultural heritage objects. The models are light—thanks to which they can be freely manipulated, as well as having the appropriate smoothness—which enables the recognition of decorative details present on them, as well as reading texts in Braille. Integrating a copy of an exhibit with a description about it in Braille into one 3D object is an innovative solution that should contribute to a better access to cultural goods for the blind. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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Open AccessArticle

Documenting Archaeological Petroglyph Sites with the Use of 3D Terrestrial Laser Scanners—A Case Study of Petroglyphs in Kyrgyzstan

by

,

,

and

Appl. Sci. 2022, 12(20), 10521; https://doi.org/10.3390/app122010521 - 18 Oct 2022

Cited by 2 | Viewed by 1218

Abstract

The use of 3D terrestrial laser scanners (TLS) in the documentation of archaeological sites is an effective method of collecting information about the area under study. The wide range of acquired data makes this method a versatile tool, and not limited only to [...] Read more.

The use of 3D terrestrial laser scanners (TLS) in the documentation of archaeological sites is an effective method of collecting information about the area under study. The wide range of acquired data makes this method a versatile tool, and not limited only to documentation tasks. This article presents the possibilities of 3D TLS and their postprocessing software in the pioneering work related to the digitization of exhibits in The Petroglyphs of Cholpon-Ata Open-air Museum near Lake Issyk-Kul in Kyrgyzstan. A 3DScaMITE methodology adapted for that task is highlighted. The data obtained during the scanning were used to build high-accuracy 3D digital petroglyph models, together with their location within the open-air museum area. The acquired models also allowed a detailed analysis of the geometric parameters of the cavities forming the petroglyph figures. The results of the analysis confirmed the thesis about improper preservation of petroglyphs. It has been demonstrated in this way that the used TLS method is completely universal in documenting petroglyphs, including the location and shape of their place of creation, as well as creating a sufficiently accurate analysis of the structure of drawings. Full article

(This article belongs to the Special Issue 3D Information Technologies for Tangible and Intangible Cultural Heritage)

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