1,326 research outputs found
HBIM TO VR. SEMANTIC AWARENESS AND DATA ENRICHMENT INTEROPERABILITY FOR PARAMETRIC LIBRARIES OF HISTORICAL ARCHITECTURE
Recently we assist to an increasing availability of HBIM models rich in geometric and informative terms. Instead, there is still a lack of researches implementing dedicated libraries, based on parametric intelligence and semantically aware, related to the architectural heritage. Additional challenges became from their portability in non-desktop environment (such as VR). The research article demonstrates the validity of a workflow applied to the architectural heritage, which starting from the semantic modeling reaches the visualization in a virtual reality environment, passing through the necessary phases of export, data migration and management. The three-dimensional modeling of the classical Doric order takes place in the BIM work environment and is configured as a necessary starting point for the implementation of data, parametric intelligences and definition of ontologies that exclusively qualify the model. The study also enables an effective method for data migration from the BIM model to databases integrated into VR technologies for AH. Furthermore, the process intends to propose a methodology, applicable in a return path, suited to the achievement of an appropriate data enrichment of each model and to the possibility of interaction in VR environment with the model
Interactive 3D architectural visualization with semantics in web browers
This paper focuses on rendering, and access to visual and descriptive information about the digital architectural models on the Web. It was proposed to reach these contents with a help of deep linking, which allows to access to different views and descriptions from both the internal navigation system or from the browser, or search engine. Along with the HTML5 and WebGL it allows updating the link during the exploration of a virtual model, and remembers to re-use. Although all the methods were tested on architecture's models, it can be used in other interactive 3D applications
3D photogrammetric data modeling and optimization for multipurpose analysis and representation of Cultural Heritage assets
This research deals with the issues concerning the processing, managing, representation
for further dissemination of the big amount of 3D data today achievable and storable with
the modern geomatic techniques of 3D metric survey. In particular, this thesis is focused
on the optimization process applied to 3D photogrammetric data of Cultural Heritage
assets.
Modern Geomatic techniques enable the acquisition and storage of a big amount of data,
with high metric and radiometric accuracy and precision, also in the very close range
field, and to process very detailed 3D textured models. Nowadays, the photogrammetric
pipeline has well-established potentialities and it is considered one of the principal
technique to produce, at low cost, detailed 3D textured models.
The potentialities offered by high resolution and textured 3D models is today well-known
and such representations are a powerful tool for many multidisciplinary purposes, at
different scales and resolutions, from documentation, conservation and restoration to
visualization and education. For example, their sub-millimetric precision makes them
suitable for scientific studies applied to the geometry and materials (i.e. for structural and
static tests, for planning restoration activities or for historical sources); their high fidelity
to the real object and their navigability makes them optimal for web-based visualization
and dissemination applications. Thanks to the improvement made in new visualization
standard, they can be easily used as visualization interface linking different kinds of
information in a highly intuitive way. Furthermore, many museums look today for more
interactive exhibitions that may increase the visitors’ emotions and many recent
applications make use of 3D contents (i.e. in virtual or augmented reality applications and
through virtual museums).
What all of these applications have to deal with concerns the issue deriving from the
difficult of managing the big amount of data that have to be represented and navigated.
Indeed, reality based models have very heavy file sizes (also tens of GB) that makes them
difficult to be handled by common and portable devices, published on the internet or
managed in real time applications. Even though recent advances produce more and more
sophisticated and capable hardware and internet standards, empowering the ability to
easily handle, visualize and share such contents, other researches aim at define a common
pipeline for the generation and optimization of 3D models with a reduced number of
polygons, however able to satisfy detailed radiometric and geometric requests.
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This thesis is inserted in this scenario and focuses on the 3D modeling process of
photogrammetric data aimed at their easy sharing and visualization. In particular, this
research tested a 3D models optimization, a process which aims at the generation of Low
Polygons models, with very low byte file size, processed starting from the data of High
Poly ones, that nevertheless offer a level of detail comparable to the original models. To
do this, several tools borrowed from the game industry and game engine have been used.
For this test, three case studies have been chosen, a modern sculpture of a contemporary
Italian artist, a roman marble statue, preserved in the Civic Archaeological Museum of
Torino, and the frieze of the Augustus arch preserved in the city of Susa (Piedmont-
Italy). All the test cases have been surveyed by means of a close range photogrammetric
acquisition and three high detailed 3D models have been generated by means of a
Structure from Motion and image matching pipeline. On the final High Poly models
generated, different optimization and decimation tools have been tested with the final aim
to evaluate the quality of the information that can be extracted by the final optimized
models, in comparison to those of the original High Polygon one. This study showed how
tools borrowed from the Computer Graphic offer great potentialities also in the Cultural
Heritage field. This application, in fact, may meet the needs of multipurpose and
multiscale studies, using different levels of optimization, and this procedure could be
applied to different kind of objects, with a variety of different sizes and shapes, also on
multiscale and multisensor data, such as buildings, architectural complexes, data from
UAV surveys and so on
Programmed design of ship forms
This paper describes a new category of CAD applications devoted to the definition and parameterization of hull forms, called programmed design. Programmed design relies on two prerequisites. The first one is a product model with a variety of types large enough to face the modeling of any type of ship. The second one is a design language dedicated to create the product model. The main purpose of the language is to publish the modeling algorithms of the application in the designer knowledge domain to let the designer create parametric model scripts. The programmed design is an evolution of the parametric design but it is not just parametric design. It is a tool to create parametric design tools. It provides a methodology to extract the design knowledge by abstracting a design experience in order to store and reuse it. Programmed design is related with the organizational and architectural aspects of the CAD applications but not with the development of modeling algorithms. It is built on top and relies on existing algorithms provided by a comprehensive product model. Programmed design can be useful to develop new applications, to support the evolution of existing applications or even to integrate different types of application in a single one. A three-level software architecture is proposed to make the implementation of the programmed design easier. These levels are the conceptual level based on the design language, the mathematical level based on the geometric formulation of the product model and the visual level based on the polyhedral representation of the model as required by the graphic card. Finally, some scenarios of the use of programmed design are discussed. For instance, the development of specialized parametric hull form generators for a ship type or a family of ships or the creation of palettes of hull form components to be used as parametric design patterns. Also two new processes of reverse engineering which can considerably improve the application have been detected: the creation of the mathematical level from the visual level and the creation of the conceptual level from the mathematical level. © 2012 Elsevier Ltd. All rights reserved. 1. Introductio
HBIM Methodology to Achieve a Balance between Protection and Habitability: The Case Study of the Monastery of Santa Clara in Belalcazar, Spain
The different technical and legal tools intended for heritage protection have augmented the
possibilities to acknowledge important monumental complexes. However, a contrast lies in the artistic
contexts in which, due to the consolidation of their programmatic typology, such monuments require
habitation, unlike more conventional monuments. This article collects the results of an accurate investigation conducted by the authors, whose main objective was to obtain a tool that allows consistent
measurement of different indicators in which both the protection of the elements, and the capacity
for habitation, are safeguarded. To this aim, we contextualized the research at the Monastery of Santa
Clara de la Columna in Belalcázar (Córdoba), a monastery with the highest heritage protection in
Spain, and which, in turn, accommodates a religious community. The results have allowed us, for the
first time in Andalucia, to define objective habitability parameters, within protected heritage contexts
Parametric and Visual Programming BIM Applied to Museums, Linking Container and Content
In recent years we have been experiencing an ever-increasing number of Building Modeling Modeling (BIM) and Visual Programming Language (VPL) approaches in the architectural design field. These experiments have inspired new research strictly focused on exploring values, criticalities, and the advantages of applying these combined methodologies in the Cultural Heritage domain. This integrated approach has emphasized the benefits derived from HBIM. The next step is to critically evaluate the application of BIM and VPL processes used in the management and valorisation of museum heritage, pursuing both parametric and algorithmic approaches. The research group worked on building a model that shared the BIM hierarchical structure and the flexibility of the VPL methodologies. Semi-automatic procedures were developed within a rigorous BIM workflow, with the help of Autodesk and McNeel tools, to show and manage complex museum management phenomena. These procedures aimed to respond to three different objectives. First, the need to associate information from the Facility Report to the individual BIM components to predict and monitor the conditions in which museum collections are found. Second, the intention to measure the attractiveness of the artifacts within the exhibition project and the design effects for a correct prefiguration of visitor flows. Third, the elements involved included the exhibition area obtained from an HBIM model (converted into a visual field through interoperable processes), the digitized collections (the attractive elements), the users and, finally, the numerical evaluation of the visibility of specific objects within collections by simulating the human point of view. Once automated, the devised procedures can be considered a prototype to support curators in controlling and improving the efficiency of the exhibition layout
Fine Art Pattern Extraction and Recognition
This is a reprint of articles from the Special Issue published online in the open access journal Journal of Imaging (ISSN 2313-433X) (available at: https://www.mdpi.com/journal/jimaging/special issues/faper2020)
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