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Computer Science

Effective Annotations Over 3D Models

Profile image of Roberto ScopignoRoberto Scopigno

Computer Graphics Forum

https://doi.org/10.1111/CGF.13664
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14 pages

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Abstract

Annotation support in interactive systems is often considered a simple task by the CG community, since it entails the apparently easy selection of a region and to connect it with some information. The reality appears more complex. The scope of this paper is twofold: first, to review the status of this domain, discussing and characterizing several approaches proposed in literature to manage annotations over geometric models; second, to present in detail an innovative solution proposed and assessed in the framework of Cultural Heritage (CH) applications, called ClippingVolumes. At the annotation definition stage ClippingVolumes uses 3D data to characterize the annotation region; subsequently, annotations are visualized by adopting a two-pass rendering solution which uses stencil buffers, thus without introducing new geometric elements, changing the topology or duplicating geometry elements. It solves most of the issues that afflict the current state of the art, such as: fragmentation; annotation transfer to multiple representations; and enabling to annotate multi-resolution data encoding. The latter is a mandatory requirement to produce efficient web-based systems. We implemented and we fully tested this approach in the framework of a complex system that supports the documentation of CH restoration projects.

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    Chiara Piccoli

    Open Archaeology

    This paper presents our ongoing work in the Virtual Interiors project, which aims to develop 3D reconstructions as geospatial interfaces to structure and explore historical data of seventeenth-century Amsterdam. We take the reconstruction of the entrance hall of the house of the patrician Pieter de Graeff (1638–1707) as our case study and use it to illustrate the iterative process of knowledge creation, sharing, and discovery that unfolds while creating, exploring and experiencing the 3D models in a prototype research environment. During this work, an interdisciplinary dataset was collected, various metadata and paradata were created to document both the sources and the reasoning process, and rich contextual links were added. These data were used as the basis for creating a user interface for an online research environment, taking design principles and previous user studies into account. Knowledge is shared by visualizing the 3D reconstructions along with the related complexities an...

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    Metodología de captura y procesado para el desarrollo de una base de datos gráfica 3D del patrimonio arquitectónico
    Marta Quintilla Castán, Luis Agustín-Hernández

    Ge-conservacion, 2022

    La documentación del Patrimonio requiere una representación ordenada de la información almacenada, debido a la diversidad de disciplinas que intervienen en el sector, con campos altamente especializados, que afecta a la comunicación entre los diferentes agentes que intervienen en los procesos de documentación. La recopilación, clasificación, análisis y presentación de la información precisa del empleo de protocolos para ordenar y utilizar de forma comprensible y coherente. Por ello, la propuesta metodológica plantea la definición de unas pautas generales para realizar la captura y el procesado de la información generada, con el fin de desarrollar una base de datos gráfica que permita representar a través de un modelo 3D la información relativa al patrimonio arquitectónico. La documentación, organizada bajo un modelo de datos común, facilita la interoperabilidad y la accesibilidad a la información archivada, y su posterior gestión.

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    Expanding Field-Archaeology Education: The Integration of 3D Technology into Archaeological Training
    Paola Derudas

    Open Archaeology, 2021

    This contribution analyses and discusses the use of 3D technology in education and learning. Basing the discussion on a case study performed during two seasons of a field school for 1st-year archaeology students, we explore how to expand traditional didactic programs by developing and testing a web-based system for educational purposes. We examine how these technologies can be used as educational means and supporting tools during an excavation; how universities can incorporate these technologies into pedagogy. We investigate whether the combination of these technologies with a successful pedagogical theory could promote students’ comprehension of the reflexive approach and engagement with the interpretative process. We introduced the students to a complete excavation methodology, including excavation, documentation, data management, and interpretation. Alongside the traditional documentation, a digital approach was added, with 3D technologies and an Interactive Visualisation System ...

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    Dynamic Collections: A 3D Web Infrastructure for Artifact Engagement
    Fredrik Ekengren

    Open Archaeology, 2021

    Archaeological collections are crucial in heritage studies and are used every day for training archaeologists and cultural heritage specialists. The recent developments in 3D acquisition and visualization technology has contributed to the rapid emergence of a large number of 3D collections, whose production is often justified as the democratization of data and knowledge production. Despite the fact that several 3D datasets are now available online, it is not always clear how the data – once stored – may be engaged by archaeology students, and the possible challenges the students may face in the learning process. The goal of the Dynamic Collections project at Lund University is to develop a novel 3D web infrastructure designed to support higher education and research in archaeology. At the onset of the COVID-19 pandemic in the spring of 2020, all teaching at Lund University moved online, reinforcing the urgency for such an infrastructure. By letting a group of students test an early ...

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