- Porto - Portugal
hugo pires
Universidade do Porto, Architecture and Urbanism Study Center, Department Member
- Cultural Heritage Recording, Documentation and Information Systems, Archaeology, Archaeometry, Archaeological Science, Photogrammetry, Digital Photogrammetry applied to Archaeology, and 43 moreArchaeological GIS, Close-range Photogrammetry, 3D Laser scanning (Architecture), 3D Laser Scanning (Archaeology), 3D Laser Scanning underwater (Archaeology), LiDAR for Landscape Archaeology, Survey (Archaeological Method & Theory), Computer Applications & Quantitative Methods in Archaeology (CAA), 3d Reconstructions in Archaeology, Spatial analysis (Archaeology), Rock art recording, Rock Art (Archaeology), Arte Rupestre, Landscape Archaeology, Digital Archaeology, Building Surveying, Cultural Heritage, Architectural Heritage, Architectural Drawing, 3D Laser scanning, Archaeoastronomy, Remote sensing and GIS applications in Landscape Research, Structure from Motion, Aerial Archaeology, 3D GIS, 3D Visualization, 3D modeling, Archeology of Roman mining, Arqueología De La Arquitectura, LiDAR for topographic mapping, Hyperspectral Scanning, Geomatics, Geo-spatial analysis with GIS and GPS, LiDAR, Remote Sensing, Rock art research, Geometrical documentation, Virtual Archaeology, Digital Museum, Virtual Museums, Digital Preservation, Virtual Reconstruction, Technology and 3D Visualisation for Scientific Research in Archaeology, Reflectance Transformation Imaging, and Multispectral Imagingedit
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A Casa do Ramalho é um pequeno abrigo formado pelo encosto de dois grandes blocos de granito biotítico de grão médio que assentam sobre afloramento da mesma tipologia de rocha localizado na Mata da Câmara, no topo do extremo oeste do... more
A Casa do Ramalho é um pequeno abrigo formado pelo encosto de
dois grandes blocos de granito biotítico de grão médio que assentam
sobre afloramento da mesma tipologia de rocha localizado na Mata da
Câmara, no topo do extremo oeste do relevo residual sobre o qual assenta Penamacor. O presente estudo tem como objecto uma figura rupestre identificada em 2016 pela geóloga Mariana Vilas Boas.
dois grandes blocos de granito biotítico de grão médio que assentam
sobre afloramento da mesma tipologia de rocha localizado na Mata da
Câmara, no topo do extremo oeste do relevo residual sobre o qual assenta Penamacor. O presente estudo tem como objecto uma figura rupestre identificada em 2016 pela geóloga Mariana Vilas Boas.
Research Interests:
A Pedra das Cruzinhas, tomando a designação que lhe foi atribuída por um informante local, é uma ocorrência arqueológica, identificada, em Março de 2008, no decurso da elaboração do estudo de incidências ambientais (EincA) (1) do Parque... more
A Pedra das Cruzinhas, tomando a designação que lhe foi atribuída por um informante local, é uma ocorrência arqueológica, identificada, em Março de 2008, no decurso da elaboração do estudo de incidências ambientais (EincA) (1) do Parque Eólico da Benespera, projecto constituído por dois conjuntos de aerogeradores, espacialmente desconexos (2), situados nos concelhos de Sabugal, Guarda e Belmonte. A singularidade desta rocha, profusamente gravada, maioritariamente com figuras cruciformes, e a circunstância de se conhecerem pouco arqueossítios deste tipo no concelho do Sabugal (AA VV, 2008), motivou o convite que nos foi gentilmente dirigido pelo arqueólogo Marcos Osório para elaboração do presente texto. Trata-se de uma notícia, cujo maior interesse reside na apresentação do método utilizado para “iluminar” os grafismos que cobrem a maior parte da superfície daquela rocha, trabalho executado por um dos signatários (HP). A Pedra das Cruzinhas mantém-se preservada no interior do Parque...
Research Interests:
El propósito de esta comunicación es ilustrar el valor de nuevas herramientas tecnológicas en la mejor visualización de textos epigráficos antiguos que han llegado hasta nosotros muy erosionados o dañados. Gracias a la aplicación del... more
El propósito de esta comunicación es ilustrar el valor de nuevas herramientas tecnológicas en la mejor visualización de textos epigráficos antiguos que han llegado hasta nosotros muy erosionados o dañados. Gracias a la aplicación del proceso de levantamiento denominado “Modelo Residual Morfológico” (M.R.M.) es posible mejorar la lectura e interpretación de numerosos epígrafes que se habían considerado perdidos o, aun conservados en parte, indescifrables.
Este “M.R.M.” es un algoritmo que fue desarrollado para mejorar la lectura de formas -no solo de letras- erosionadas o muy sutiles en cualquier tipo de soporte. Permite contrastar la morfología residual distinguiéndola de la morfología predominante y en conjunto facilitar el descubrimiento de características imperceptibles a los sentidos humanos. En sentido práctico, crea imágenes de síntesis donde las huellas de las formas originales son contrastadas frente a las demás irregularidades de la superficie, a través de intuitivos códigos de color, proporcionando a los investigadores una representación mejorada y más próxima a su aspecto original. Por lo que respecta a las superficies inscritas, esta técnica resulta especialmente útil para las piedras duras y con múltiples escalas de relieve como el granito, donde permite diferenciar distintivamente entre rasponazos más recientes y los niveles de la grabación del texto de época romana. Y aunque no se recupere siempre la totalidad del texto perdido, sí permite trabajar con mucha más seguridad y rapidez, de modo que la aproximación al texto original es más completa y, con frecuencia, definitiva.
En el marco del proyecto de investigación del que formamos parte y cuyo IP es el Profesor Antonio Alvar Ezquerra (UAH), “Nueva Edición del CIL II: Conventus Emeritensis. 1.- Augusta Emerita. Tituli sepulcrales urbanos”, se viene poniendo en práctica esta aplicación del M.R.M. en aquellas inscripciones funerarias emeritenses susceptibles de revisión respecto a lecturas anteriores, bien porque su superficie ha sufrido la erosión propia del paso del tiempo, bien porque ha sido dañada intencionalmente. Tal como se verá en los epígrafes que expondremos, una muestra de estelas y cupas graníticas, así como otra de placas marmóreas, extraídas de los fondos arqueológicos del Consorcio de la Ciudad de Mérida, los resultados de este nuevo método suponen un considerable avance para acercarnos al estadio original de las inscripciones, con el consiguiente aprovechamiento en los campos de la investigación y la difusión histórica.
Este “M.R.M.” es un algoritmo que fue desarrollado para mejorar la lectura de formas -no solo de letras- erosionadas o muy sutiles en cualquier tipo de soporte. Permite contrastar la morfología residual distinguiéndola de la morfología predominante y en conjunto facilitar el descubrimiento de características imperceptibles a los sentidos humanos. En sentido práctico, crea imágenes de síntesis donde las huellas de las formas originales son contrastadas frente a las demás irregularidades de la superficie, a través de intuitivos códigos de color, proporcionando a los investigadores una representación mejorada y más próxima a su aspecto original. Por lo que respecta a las superficies inscritas, esta técnica resulta especialmente útil para las piedras duras y con múltiples escalas de relieve como el granito, donde permite diferenciar distintivamente entre rasponazos más recientes y los niveles de la grabación del texto de época romana. Y aunque no se recupere siempre la totalidad del texto perdido, sí permite trabajar con mucha más seguridad y rapidez, de modo que la aproximación al texto original es más completa y, con frecuencia, definitiva.
En el marco del proyecto de investigación del que formamos parte y cuyo IP es el Profesor Antonio Alvar Ezquerra (UAH), “Nueva Edición del CIL II: Conventus Emeritensis. 1.- Augusta Emerita. Tituli sepulcrales urbanos”, se viene poniendo en práctica esta aplicación del M.R.M. en aquellas inscripciones funerarias emeritenses susceptibles de revisión respecto a lecturas anteriores, bien porque su superficie ha sufrido la erosión propia del paso del tiempo, bien porque ha sido dañada intencionalmente. Tal como se verá en los epígrafes que expondremos, una muestra de estelas y cupas graníticas, así como otra de placas marmóreas, extraídas de los fondos arqueológicos del Consorcio de la Ciudad de Mérida, los resultados de este nuevo método suponen un considerable avance para acercarnos al estadio original de las inscripciones, con el consiguiente aprovechamiento en los campos de la investigación y la difusión histórica.
Research Interests:
based on new graphics surveys, several engraved rocks on the right bank of the river Erges associated with two cyclopean shelters situated in its flood bed (Tapada da Foz, Segura, and Foz do Ribeiro das Taliscas, Rosmaninhal) are... more
based on new graphics surveys, several engraved rocks on the right bank of the river Erges associated with two cyclopean shelters situated in its flood bed (Tapada da Foz, Segura, and Foz do Ribeiro das Taliscas, Rosmaninhal) are presented. These occurrences, attributable to recent preHistory , document common recording techniques (pecking and abrasion) and in the case of Ribeiro das Taliscas shelter fine incisions. The shelters, with very irregular surfaces, have multiple petroglyphs, especially inside, where traditional recording techniques are very difficult to apply. The support surfaces are difficult to represent without distortion, and the engraved motifs often offer difficulties of interpretation. To overcome these, we decided to use three-dimensional scanning technology to record the engraved rock surfaces and complement this information with the Morphological Residual Model (MRM), a tool created by one of the authors (HP) that enhances perception of small and faint irregularities. This combination of techniques has great advantages over traditional methods of recording, like efficiency, objectivity, three-dimensionality, versatility and, in particular, greater portability, lower cost and greater speed of execution.
Research Interests: Prehistoric Archaeology, Rock Art (Archaeology), Cultural Heritage Recording, Documentation and Information Systems, Survey (Archaeological Method & Theory), Rivers, and 11 more3D Laser scanning (Architecture), 3D visualisation, Iberian Prehistory (Archaeology), Digital Photogrammetry applied to Archaeology, Prehistoric Rock Art, Arte Rupestre, 3D Laser Scanning (Archaeology), Rock art research, Technology and 3D Visualisation for Scientific Research in Archaeology, Arte Rupestre Prehistórico, and Arte Rupestre Esquemático
The recent developments in 3D scanning technologies are not been accompanied by visualization interfaces. We are still using the same types of visual codes as when maps and drawings were made by hand. The available information in 3D... more
The recent developments in 3D scanning technologies are not been accompanied by visualization interfaces. We are still using the same types of visual codes as when maps and drawings were made by hand. The available information in 3D scanning data sets is not being fully exploited by current visualization techniques.
In this paper we present recent developments regarding the use of 3D scanning data sets for revealing invisible information from archaeological sites. These sites are affected by a common problem, decay processes, such as erosion, that never ceases its action and endangers the persistence of last vestiges of some peoples and cultures.
Rock art engravings, or epigraphical inscriptions, are among the most affected by these processes because they are, due to their one nature, carved at the surface of rocks often exposed to climatic agents. The study and interpretation of these motifs and texts is strongly conditioned by the degree of conservation of the imprints left by our ancestors. Every single detail in the remaining carvings can make a huge difference in the conclusions taken by specialists.
We have selected two case-studies severely affected by erosion to present the results of the on-going work dedicated to explore in new ways the information contained in 3D scanning data sets.
A new method for depicting subtle morphological features in the surface of objects or sites has been developed. It allows to contrast human patterns still present at the surface but invisible to naked eye or by any other archaeological inspection technique. It was called Morphological Residual Model (MRM) because of its ability to contrast the shallowest morphological details, to which we refer as residuals, contained in the wider forms of the backdrop.
Afterwards, we have simulated the process of building Polynomial Texture Maps - a widespread technique that as been contributing to archaeological studies for some years - in a 3D virtual environment using the results of MRM calculations. By this, we wish to benefit from the rendering capabilities of RTI-viewer and from its intuitive graphic interface. At the same time, virtual PTM is a way of applying this to areas barred to conventional PTM, like in the case presented of an entire roman city occupying a plateau of several sq. km.
The results of this research project are presented and discussed using the two case-studies aforementioned, a Latin inscription from a Roman sanctuary in the north of Portugal and a engraved panel with zoomorphic motifs from a rock art site in the north border of Portugal.
In this paper we present recent developments regarding the use of 3D scanning data sets for revealing invisible information from archaeological sites. These sites are affected by a common problem, decay processes, such as erosion, that never ceases its action and endangers the persistence of last vestiges of some peoples and cultures.
Rock art engravings, or epigraphical inscriptions, are among the most affected by these processes because they are, due to their one nature, carved at the surface of rocks often exposed to climatic agents. The study and interpretation of these motifs and texts is strongly conditioned by the degree of conservation of the imprints left by our ancestors. Every single detail in the remaining carvings can make a huge difference in the conclusions taken by specialists.
We have selected two case-studies severely affected by erosion to present the results of the on-going work dedicated to explore in new ways the information contained in 3D scanning data sets.
A new method for depicting subtle morphological features in the surface of objects or sites has been developed. It allows to contrast human patterns still present at the surface but invisible to naked eye or by any other archaeological inspection technique. It was called Morphological Residual Model (MRM) because of its ability to contrast the shallowest morphological details, to which we refer as residuals, contained in the wider forms of the backdrop.
Afterwards, we have simulated the process of building Polynomial Texture Maps - a widespread technique that as been contributing to archaeological studies for some years - in a 3D virtual environment using the results of MRM calculations. By this, we wish to benefit from the rendering capabilities of RTI-viewer and from its intuitive graphic interface. At the same time, virtual PTM is a way of applying this to areas barred to conventional PTM, like in the case presented of an entire roman city occupying a plateau of several sq. km.
The results of this research project are presented and discussed using the two case-studies aforementioned, a Latin inscription from a Roman sanctuary in the north of Portugal and a engraved panel with zoomorphic motifs from a rock art site in the north border of Portugal.
Research Interests: Archaeology, Archaeological Science, Digital Archaeology, Rock Art (Archaeology), Cultural Heritage Recording, Documentation and Information Systems, and 11 moreSurvey (Archaeological Method & Theory), Digital Photogrammetry applied to Archaeology, Spatial analysis (Archaeology), Computer Applications & Quantitative Methods in Archaeology (CAA), Reflectance Transformation Imaging, Arte Rupestre, Digital epigraphy, Epigraphy, Rock art research, Technology and 3D Visualisation for Scientific Research in Archaeology, and Rock art recording
The analysis of the epigraphic assemblage of Panóias, using the Morhological Residual Model (M.R.M.), as a new method of reading, allowed the reconstitution of nearly the entire engraved texts, including the traces barely noticed... more
The analysis of the epigraphic assemblage of Panóias, using the Morhological Residual Model (M.R.M.), as a new method of reading, allowed the reconstitution of nearly the entire engraved texts, including the traces barely noticed nowadays, which implies the correction of former readings of CIL II 2395a, 2395c y 2395d, as well as the revision of the previous interpretations of this sanctuary. Therefore, Serapis, which was thought to be just one of the several deities referred in this cult place, appears now, not only in one, but in two inscriptions, together with Isis and Core, respectively, forming a whole much more coherent, within this particular religious environment.
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Research Interests:
Research Interests:
Research Interests:
In this paper we discuss the origin of the granite used in the construction of Castelo de Ródão, a watchtower surrounded by defensive wall, located on the Tagus River on Portas de Ródão. With the application of the morphological residual... more
In this paper we discuss the origin of the granite used in the construction of Castelo de Ródão, a watchtower surrounded by defensive wall, located on the Tagus River on Portas de Ródão.
With the application of the morphological residual model we intended to identify traces of a possible inscription in the door tympanum of this tower, on which a cross of the Temple has been recorded.
We address other issues, namely the presence of stonemason signatures and legends associated with that construction.
With the application of the morphological residual model we intended to identify traces of a possible inscription in the door tympanum of this tower, on which a cross of the Temple has been recorded.
We address other issues, namely the presence of stonemason signatures and legends associated with that construction.
Research Interests:
Resumo Em 2014 foi encontrado o marco miliário correspondente à milha 8 a partir de Igaeditania no intinerário que ligava a Centum Cellas. Neste miliário são homenageados os imperadores integrantes da quarta tetrarquia (308-311). A... more
Resumo
Em 2014 foi encontrado o marco miliário correspondente à milha 8 a partir de Igaeditania no intinerário que ligava a Centum Cellas.
Neste miliário são homenageados os imperadores integrantes da quarta tetrarquia (308-311).
A leitura do texto epigrafado, em muito mau estado de conservação, baseou-se na aplicação de uma nova técnica digital de registo, o Modelo de Resíduo Morfológico (MRM).
Abstract
In 2014 it was found the milestone corresponding to the mile 8 from Igaeditania. It belongs to the itinerary that connected Igaeditania the Centum Cellas.
In this milestone it is honored members emperors of the fourth Tetrarchy (308-311).
Reading of the engraved text, in very poor condition, was based on the application of a new digital technology, the Morphological Residual Model.
Em 2014 foi encontrado o marco miliário correspondente à milha 8 a partir de Igaeditania no intinerário que ligava a Centum Cellas.
Neste miliário são homenageados os imperadores integrantes da quarta tetrarquia (308-311).
A leitura do texto epigrafado, em muito mau estado de conservação, baseou-se na aplicação de uma nova técnica digital de registo, o Modelo de Resíduo Morfológico (MRM).
Abstract
In 2014 it was found the milestone corresponding to the mile 8 from Igaeditania. It belongs to the itinerary that connected Igaeditania the Centum Cellas.
In this milestone it is honored members emperors of the fourth Tetrarchy (308-311).
Reading of the engraved text, in very poor condition, was based on the application of a new digital technology, the Morphological Residual Model.
Research Interests:
Epigraphic inscriptions that present high level of surface degradation are usually difficult and tricky to read. Until now, most epigraphic readings have been accomplished by empiric procedures, supported by the visual and tactile... more
Epigraphic inscriptions that present high level of surface degradation are usually difficult and tricky to read. Until now, most epigraphic readings have been accomplished by empiric procedures, supported by the visual and tactile perception of the observer, which is naturally subjective, and, often, complemented by lightning techniques, like raking light, that enhance surface texture and detail by casting dramatic shadows on the surface. What if some of these heavily eroded inscriptions that are no longer perceived still keep traces of engravings? To address this challenge a simple and cost-effective method is presented, the Morphological Residual Model (M.R.M.). This method creates high contrast depictions of surface irregularities using 3D scanning data and morphological filtering algorithms. In most cases, the main epigraphic reading problems are overcome by this methodology as exemplified in the case-studies presented.
Research Interests:
The objective of this article is to present the possibilities and advantages of using the Morphological Residual Model (M.R.M.) technique as a new and accurate method for epigraphic reading, through the display of four paradigmatic case... more
The objective of this article is to present the possibilities and advantages of using the Morphological Residual Model (M.R.M.) technique as a new and accurate method for epigraphic reading, through the display of four paradigmatic case studies from Portugal. For each inscription, this new application allowed to recapture nearly the entire original engraved text, including the traces unseen to the human eye that were until now, impossible to recover through traditional epigraphic procedures. Each of these cases produced new readings that enlighten not only the text but also the context to which they were associated, pushing forward the epigraphic research.
Research Interests:
Research Interests:
"The paper presents an interdisciplinary project which is a work in progress towards a 3D Geographical Information System (GIS) dedicated to Cultural Heritage with a specific focus application on the Castle of Shawbak, also known as the... more
"The paper presents an interdisciplinary project which is a work in progress towards a 3D Geographical Information System (GIS) dedicated to Cultural Heritage with a specific focus application on the Castle of Shawbak, also known as the “Crac de Montréal”, one of the best preserved rural medieval settlements in the entire Middle East. We develop a set of tools for medieval archaeological analysis ranging from the production of traditional graphical documentation like orthophotos and low-resolution 3D models (VRML) to the use of 3D/2D GIS through the creation of centralized and exhaustive object storage tool both for archaeological and photogrammetric data. Using these tools archaeologists will be able to produce, store, visualize and manage both archaeological and 3D data, according to their needs. The Shawbak archaeological project is a specific and integrated project between medieval archaeological research, conservative restoration and site's valorization. Focusing mainly on stratigraphical analysis of upstanding structures provides archaeologists with a huge amount of data to collect on site and useful records that will be used to understand the structures from stratigraphical and technological point of views. The foundation stone for this project is the analysis of documents produced and used by archaeologists in order to identify specific archaeological requirements.
The first phase is to give archaeologists traditional photogrammetric tools so that they can be autonomous in producing graphical documents (taking photographs, photo orientation and traditional orthophoto generation). The second step is to develop a common model structure for both photogrammetric and archaeological data storage using a unique database and allowing to link archaeological data with 3D measurements. Specific photogrammetry tools dedicated to stone by stone measurement have been under development since 2000 to help archaeologists to easily produce photogrammetric surveys. These tools are now integrated in a more complex system which allows automatic production of 2D or 3D representations from archaeological database queries. The graphical 2D documents produced through this process look like the handmade drawings done by archaeologists using orthophotos. The 3D GIS is the last step of this chain and aims the automatic production of 3D models through archaeological database queries: these 3D models are in fact a graphical image of the database and at the same time the interface through which the user is able to modify it. This approach enables automatic 3D thematic representation and new archaeological analysis through bidirectional-links between 3D representation and archaeological data. All these developments are written in Java within Arpenteur framework. (Arpenteur, 2008) "
The first phase is to give archaeologists traditional photogrammetric tools so that they can be autonomous in producing graphical documents (taking photographs, photo orientation and traditional orthophoto generation). The second step is to develop a common model structure for both photogrammetric and archaeological data storage using a unique database and allowing to link archaeological data with 3D measurements. Specific photogrammetry tools dedicated to stone by stone measurement have been under development since 2000 to help archaeologists to easily produce photogrammetric surveys. These tools are now integrated in a more complex system which allows automatic production of 2D or 3D representations from archaeological database queries. The graphical 2D documents produced through this process look like the handmade drawings done by archaeologists using orthophotos. The 3D GIS is the last step of this chain and aims the automatic production of 3D models through archaeological database queries: these 3D models are in fact a graphical image of the database and at the same time the interface through which the user is able to modify it. This approach enables automatic 3D thematic representation and new archaeological analysis through bidirectional-links between 3D representation and archaeological data. All these developments are written in Java within Arpenteur framework. (Arpenteur, 2008) "
Research Interests:
Research Interests:
A Pedra das Cruzinhas, tomando a designação que lhe foi atribuída por um informante local, é uma ocorrência arqueológica, identificada, em Março de 2008, no decurso da elaboração do estudo de incidências ambientais (EincA) (1) do Parque... more
A Pedra das Cruzinhas, tomando a designação que lhe foi atribuída por um informante local, é uma ocorrência arqueológica, identificada, em Março de 2008, no decurso da elaboração do estudo de incidências ambientais (EincA) (1) do Parque Eólico da Benespera, projecto constituído por dois conjuntos de aerogeradores, espacialmente desconexos (2), situados nos concelhos de Sabugal, Guarda e Belmonte.
A singularidade desta rocha, profusamente gravada, maioritariamente com figuras cruciformes, e a circunstância de se conhecerem pouco arqueossítios deste tipo no concelho do Sabugal (AA VV, 2008), motivou o convite que nos foi gentilmente dirigido pelo arqueólogo Marcos Osório para elaboração do presente texto. Trata-se de uma notícia, cujo maior interesse reside na apresentação do método utilizado para “iluminar” os grafismos que cobrem a maior parte da superfície daquela rocha, trabalho executado por um dos signatários (HP).
A Pedra das Cruzinhas mantém-se preservada no interior do Parque Eólico da Benespera, cuja obra decorria em 2011, à data da elaboração deste texto. Reconhecendo-se como positivo o facto deste projecto ter contribuído para a identificação do monumento em apreço, considera-se conveniente, na linha do que é preconizado nos estudos ambientais que antecederam aquela obra, garantir a sua salvaguarda para o futuro, dado estar sujeito a maior risco com a nova acessibilidade instalada naquela área.
A singularidade desta rocha, profusamente gravada, maioritariamente com figuras cruciformes, e a circunstância de se conhecerem pouco arqueossítios deste tipo no concelho do Sabugal (AA VV, 2008), motivou o convite que nos foi gentilmente dirigido pelo arqueólogo Marcos Osório para elaboração do presente texto. Trata-se de uma notícia, cujo maior interesse reside na apresentação do método utilizado para “iluminar” os grafismos que cobrem a maior parte da superfície daquela rocha, trabalho executado por um dos signatários (HP).
A Pedra das Cruzinhas mantém-se preservada no interior do Parque Eólico da Benespera, cuja obra decorria em 2011, à data da elaboração deste texto. Reconhecendo-se como positivo o facto deste projecto ter contribuído para a identificação do monumento em apreço, considera-se conveniente, na linha do que é preconizado nos estudos ambientais que antecederam aquela obra, garantir a sua salvaguarda para o futuro, dado estar sujeito a maior risco com a nova acessibilidade instalada naquela área.
Research Interests:
"The use of non-intrusive digital technologies in Rock Art documentation as in other forms of art like paintings, sculpture, proto-sculpture or mosaics, as been applied by the authors in several projects, aiming the creation of digital... more
"The use of non-intrusive digital technologies in Rock Art documentation as in other forms of art like paintings, sculpture, proto-sculpture or mosaics, as been applied by the authors in several projects, aiming the creation of digital virtual models that can provide researchers a new interpretation support that allows detailed inspection as well as to develop a new method for future memory registry.
Two case-studies are presented: the nº1 Salgueiros stele, from Picote in Miranda do Douro, and the cave paintings in the shelter 7 at Regato das Bouças from Serra de Passos in Mirandela. In the first case a three-dimensional scanning was done aiming to assess the existence of engraved drawings and traces of molding. In what concerns the shelter 7, the preliminary results from a on-going project concerning the combination of multi-spectral photography and structured light three-dimensional scanning are presented, aiming to improve the spectral limits of human vision. As in the engravings case, the creation of a three-dimensional model is aimed in order to facilitate the drawings interpretation allowing simultaneously to understand the spatial relation between drawings, of these with the rock morphology and its distribution throughout the support."
Two case-studies are presented: the nº1 Salgueiros stele, from Picote in Miranda do Douro, and the cave paintings in the shelter 7 at Regato das Bouças from Serra de Passos in Mirandela. In the first case a three-dimensional scanning was done aiming to assess the existence of engraved drawings and traces of molding. In what concerns the shelter 7, the preliminary results from a on-going project concerning the combination of multi-spectral photography and structured light three-dimensional scanning are presented, aiming to improve the spectral limits of human vision. As in the engravings case, the creation of a three-dimensional model is aimed in order to facilitate the drawings interpretation allowing simultaneously to understand the spatial relation between drawings, of these with the rock morphology and its distribution throughout the support."
Research Interests:
This article addresses the application of geomatic technologies in the field of painting conservation and restoration (C&R). It results from collaboration between geomatic professionals and conservators-restorers and intends to gradually... more
This article addresses the application of geomatic technologies in the field of painting conservation and restoration (C&R). It results from collaboration between geomatic professionals and conservators-restorers and intends to gradually integrate techniques like photogrammetry, laser scanning, multi-spectral analysis or geographic information systems in the daily work of C&R. In this phase we have focused our efforts in the specific field of retable wooden painting using as case-study paintings from the XVIth century belonging to the Convent of Christ in Tomar, Portugal, that are part of a large dimension retable composed originally by twelve pieces in the deambulatory chapel of the convent church. Until now, at least in Portugal, painting C&R does not use any of the documentation standard procedures already applied in other cultural heritage fields like archaeology or architecture. The conceptual plans for future research along with the results from the laser scanning and photogrammetry campaigns are presented. Preliminary achievements with a multi-spectral analysis system will also be stated as part of the work in progress.
Research Interests:
The scientific session DocGraf '16 aims to be a forum for debate and discussion on the role of digital technologies in research in Architecture and Urbanism. In this first session experts from various fields of knowledge share experiences... more
The scientific session DocGraf '16 aims to be a forum for debate and discussion on the role of digital technologies in research in Architecture and Urbanism. In this first session experts from various fields of knowledge share experiences where the use of these new tools, specifically from the area of geomatics and computer graphics, proved to be a critical success factor in the projects in which have been integrated.
The session will also feature the presentation of the project Architectural Democracy that focuses on the relationship between architecture, technology and policy and its implications in the context of citizenship, architectural practice and urban policies. The line of research focuses on ways to use technology to transform buildings in "open-source" interfaces to improve citizens' understanding of the everyday built environment and, therefore, the quality of architecture and citizenship.
The session will also feature the presentation of the project Architectural Democracy that focuses on the relationship between architecture, technology and policy and its implications in the context of citizenship, architectural practice and urban policies. The line of research focuses on ways to use technology to transform buildings in "open-source" interfaces to improve citizens' understanding of the everyday built environment and, therefore, the quality of architecture and citizenship.
Research Interests:
Research Interests:
Research Interests:
The results of the application of the morphological residual model (M.R.M.), a new technique for morphological filtering and contrasting, to record several petroglyphs in the central region of Portugal are presented and discussed. The... more
The results of the application of the morphological residual model (M.R.M.), a new technique for morphological filtering and contrasting, to record several petroglyphs in the central region of Portugal are presented and discussed.
The selected case-studies, in the municipalities of Sabugal/Guarda, Proença-a-Nova, Vila Velha de Ródão and Ansião, illustrate three different geological substrates (metasediments, granite and limestone) and represent a significant variety of engraving techniques, thematics and chronologies, from recent Prehistory to Contemporary Age.
The lithological and typological diversity of this set of rock art sites allowed us to test the proposed methodology in a diverse range of situations, thereby contributing to the identification of cases where the application may prove more effective. The data needed for calculating the M.R.M. is obtained from three-dimensional scanning of any other technology that is capable of producing point-clouds with a ground sampling value lower than the traces to be detected. In this study, the three-dimensional models were obtained by photogrammetric techniques, based on sets of digital photographs captured with a digital camera.
The M.R.M. approach was used to enhance the visual contrast of the micro-topographical data captured in three-dimensional models, thus enhancing visual perception of the surface morphology. The survey and depiction of petroglyphs using the proposed method is a semi-automatic procedure, objective and provides a greater amount of information for archaeological interpretation. The results were compared with those obtained in the past with conventional recording methods. From this experience, we discuss the advantages and limitations of this new recording technique.
The selected case-studies, in the municipalities of Sabugal/Guarda, Proença-a-Nova, Vila Velha de Ródão and Ansião, illustrate three different geological substrates (metasediments, granite and limestone) and represent a significant variety of engraving techniques, thematics and chronologies, from recent Prehistory to Contemporary Age.
The lithological and typological diversity of this set of rock art sites allowed us to test the proposed methodology in a diverse range of situations, thereby contributing to the identification of cases where the application may prove more effective. The data needed for calculating the M.R.M. is obtained from three-dimensional scanning of any other technology that is capable of producing point-clouds with a ground sampling value lower than the traces to be detected. In this study, the three-dimensional models were obtained by photogrammetric techniques, based on sets of digital photographs captured with a digital camera.
The M.R.M. approach was used to enhance the visual contrast of the micro-topographical data captured in three-dimensional models, thus enhancing visual perception of the surface morphology. The survey and depiction of petroglyphs using the proposed method is a semi-automatic procedure, objective and provides a greater amount of information for archaeological interpretation. The results were compared with those obtained in the past with conventional recording methods. From this experience, we discuss the advantages and limitations of this new recording technique.
Research Interests:
Paper presented during the GENIUS LOCI: Places and Meanings held in Porto (Portugal), 20-22 April 2016. Apresentado no GENIUS LOCI: Lugares e Significados, realizada em Porto (Portugal), 20-22 Abril 2016. Lino Tavares Dias (1997: 301) e... more
Paper presented during the GENIUS LOCI: Places and Meanings held in Porto (Portugal), 20-22 April 2016.
Apresentado no GENIUS LOCI: Lugares e Significados, realizada em Porto (Portugal), 20-22 Abril 2016.
Lino Tavares Dias (1997: 301) e António Baptista Lopes (1998: 290-291) referem a existência de um acampamento militar romano no alto da Serra do Marão, definido por um recinto rectangular, ao qual lhe estaria associado uma torre de planta quadrangular. Este possível acampamento é identificado por uma inscrição gravada sobre um penedo que se localiza nas proximidades: Castra Oresbi. A exiguidade dos dados arqueológicos apresentados levou mesmo alguns autores (Martins 2009: 127) a contestar esta interpretação, considerando “mais viável a hipótese do penedo estar associado a um termo de populus, ou a um limite de "grupo social" de categoria inferior ao primeiro” (ibid.).
Posto isto, propomo-nos realizar uma revisão integral da evidência arqueológica disponível através de pesquisa bibliográfica, prospecção, aplicação de tecnologias geoespaciais e análise epigráfica. O objetivo deste trabalho passa por avaliar o verdadeiro potencial arqueológico desta zona e propor uma reinterpretação desta problemática científica.
Apresentado no GENIUS LOCI: Lugares e Significados, realizada em Porto (Portugal), 20-22 Abril 2016.
Lino Tavares Dias (1997: 301) e António Baptista Lopes (1998: 290-291) referem a existência de um acampamento militar romano no alto da Serra do Marão, definido por um recinto rectangular, ao qual lhe estaria associado uma torre de planta quadrangular. Este possível acampamento é identificado por uma inscrição gravada sobre um penedo que se localiza nas proximidades: Castra Oresbi. A exiguidade dos dados arqueológicos apresentados levou mesmo alguns autores (Martins 2009: 127) a contestar esta interpretação, considerando “mais viável a hipótese do penedo estar associado a um termo de populus, ou a um limite de "grupo social" de categoria inferior ao primeiro” (ibid.).
Posto isto, propomo-nos realizar uma revisão integral da evidência arqueológica disponível através de pesquisa bibliográfica, prospecção, aplicação de tecnologias geoespaciais e análise epigráfica. O objetivo deste trabalho passa por avaliar o verdadeiro potencial arqueológico desta zona e propor uma reinterpretação desta problemática científica.
Research Interests: Photogrammetry, Landscape Archaeology, Early Medieval Archaeology, Early Medieval History, Latin Epigraphy, and 7 moreRoman military archaeology, Digital Photogrammetry applied to Archaeology, Medieval Epigraphy, Medieval and Early Modern Archaeology, Roman Portugal, Galicia and Portugal Medieval History, and Roman Archaeology
Research Interests:
The Morphological Residual Model is a technique to contrast and depict shape from 3D models that contributes significantly to increase the amount of information available for archaeological researchers in the surface of sites and objects.... more
The Morphological Residual Model is a technique to contrast and depict shape from 3D models that contributes significantly to increase the amount of information available for archaeological researchers in the surface of sites and objects. The result of this process is a 3D model where morphological anomalies are depicted as vertex colour attributes.
The visual inspection of these kind of 3D digital models is a time-consuming and relatively complex process. It comprises managing files of huge sizes that require heavy hardware and a certain amount of expertise to efficiently interact in 3D virtual environments.
To address this problem we used a virtual approach to the PTM/RTI pipeline, a well-known technique for visualizing shape in archaeological studies, but instead of photographs from real scenes we worked with virtual images captured from 3D models textured with MRM. The results are compared to those achieved with 3D shading filters, aiming to contribute for the discussion about 3D data and visual interfaces in archaeology.
The visual inspection of these kind of 3D digital models is a time-consuming and relatively complex process. It comprises managing files of huge sizes that require heavy hardware and a certain amount of expertise to efficiently interact in 3D virtual environments.
To address this problem we used a virtual approach to the PTM/RTI pipeline, a well-known technique for visualizing shape in archaeological studies, but instead of photographs from real scenes we worked with virtual images captured from 3D models textured with MRM. The results are compared to those achieved with 3D shading filters, aiming to contribute for the discussion about 3D data and visual interfaces in archaeology.
Research Interests: Rock Art (Archaeology), Digital Preservation, Cultural Heritage Recording, Documentation and Information Systems, Survey (Archaeological Method & Theory), Digital preservation (Cultural Heritage), and 7 moreDigital Photogrammetry applied to Archaeology, Rock Art, Reflectance Transformation Imaging, 3D scanning, Rock art research, Technology and 3D Visualisation for Scientific Research in Archaeology, and Rock art recording
In this communication we present and discuss the results of the tests carried out to assess the suitability of the Morphological Residual Model (MRM) approach as a recording system for carvings and engravings in multiple archaeological... more
In this communication we present and discuss the results of the tests carried out to assess the suitability of the Morphological Residual Model (MRM) approach as a recording system for carvings and engravings in multiple archaeological and geological contexts.
The selected case-studies are located in four counties of the central region of Portugal (Ansião, Sabugal/Guarda, Proença-a-Nova and Vila Velha de Ródão) and illustrate three common lithologies in this region (limestone, granite and greywacke). They also include a significant variety of engraving techniques, thematics and cronologies from recent Prehistory to the Contemporary Era, and have all been previously recorded by direct tracing in transparent film.
The 3D scanning surveys used for the MRM calculations were accomplished using a digital SLR camera for capturing overlapping sequences of photographs. Photogrammetry and dense image matching were latter used for calculating dense 3D point-clouds from the image sets.
The MRM was used to increase the contrast of micro-topographic features of the 3D models, thus enhancing the visual perception of the surface morphology. Using this method, the depiction of engravings becomes an automated and objective procedure, increasing the amount of available information for archaeological interpretation.
The results are compared to those obtained in the past, using conventional tracing methods. From this experience we discuss the advantages and limitations of this new documentation technique.
The selected case-studies are located in four counties of the central region of Portugal (Ansião, Sabugal/Guarda, Proença-a-Nova and Vila Velha de Ródão) and illustrate three common lithologies in this region (limestone, granite and greywacke). They also include a significant variety of engraving techniques, thematics and cronologies from recent Prehistory to the Contemporary Era, and have all been previously recorded by direct tracing in transparent film.
The 3D scanning surveys used for the MRM calculations were accomplished using a digital SLR camera for capturing overlapping sequences of photographs. Photogrammetry and dense image matching were latter used for calculating dense 3D point-clouds from the image sets.
The MRM was used to increase the contrast of micro-topographic features of the 3D models, thus enhancing the visual perception of the surface morphology. Using this method, the depiction of engravings becomes an automated and objective procedure, increasing the amount of available information for archaeological interpretation.
The results are compared to those obtained in the past, using conventional tracing methods. From this experience we discuss the advantages and limitations of this new documentation technique.
Research Interests:
Research Interests:
"Los avances tecnológicos de las últimas décadas tuvieron como consecuencia la democratización de un conjunto de técnicas y métodos de documentación gráfica y visual del patrimonio cultural. Asistimos a una creciente oferta de... more
"Los avances tecnológicos de las últimas décadas tuvieron como consecuencia la democratización de un conjunto de técnicas y métodos de documentación gráfica y visual del patrimonio cultural. Asistimos a una creciente oferta de aplicaciones informáticas y aparatos que permitirán desarrollar significativamente los standard existentes en distintas áreas de conocimiento. Este articulo se enfoca en el análisis de la aplicación de distintas tecnologías geomáticas en la área del patrimonio cultural.
Las potenciales aplicaciones de todas estas tecnologías al patrimonio arquitectónico, arqueológico o artístico no están todavía definidas. Es este el labor que todos tenemos por delante en los próximos años; investigar, desarrollar y aplicar los nuevos medios tecnológicos teniendo en vista contribuir mutuamente para el avance de las ciencias de la conservación, preservación y divulgación de nuestro patrimonio cultural."
Las potenciales aplicaciones de todas estas tecnologías al patrimonio arquitectónico, arqueológico o artístico no están todavía definidas. Es este el labor que todos tenemos por delante en los próximos años; investigar, desarrollar y aplicar los nuevos medios tecnológicos teniendo en vista contribuir mutuamente para el avance de las ciencias de la conservación, preservación y divulgación de nuestro patrimonio cultural."
Research Interests:
The use of techniques based on 3D point-clouds for modeling and documentation of cultural heritage and the mapping and survey of archaeological landscapes has evolved remarkably and it’s becoming of a widespread use. In the case of the... more
The use of techniques based on 3D point-clouds for modeling and documentation of cultural heritage and the mapping and survey of archaeological landscapes has evolved remarkably and it’s becoming of a widespread use. In the case of the mapping and prospection of mining landscapes, areas which are usually densely forested, the identification and documentation of archaeological features, coupled with its size and complexity, is still very problematic when relying on well-known methods such as photointerpretation or fieldwork.
The introduction of airborne laser scanning (ALS) or airborne Light Detection and Ranging (LiDAR) helped to overcome this problem because of its unique capability to penetrate vegetation canopies, allowing the documentation of the underneath topographic surface
and thus the identification of archaeological remains. The effectiveness of airborne LiDAR in detecting new archaeological sites and features and in improving the documentation of the already known is well proved, so ALS has completely revolutionized the area of archaeological survey. Given this, we present in this study some preliminary results related to the potential of airborne LiDAR to archaeological research of ancient mining landscapes.
The introduction of airborne laser scanning (ALS) or airborne Light Detection and Ranging (LiDAR) helped to overcome this problem because of its unique capability to penetrate vegetation canopies, allowing the documentation of the underneath topographic surface
and thus the identification of archaeological remains. The effectiveness of airborne LiDAR in detecting new archaeological sites and features and in improving the documentation of the already known is well proved, so ALS has completely revolutionized the area of archaeological survey. Given this, we present in this study some preliminary results related to the potential of airborne LiDAR to archaeological research of ancient mining landscapes.
Research Interests: Archaeology, Geoarchaeology, Landscape Archaeology, Cultural Heritage Recording, Documentation and Information Systems, Remote sensing and GIS applications in Landscape Research, and 9 moreArcheology of Roman mining, LiDAR for topographic mapping, Spatial analysis (Archaeology), 3D Laser Scanning (Archaeology), LiDAR for Landscape Archaeology, Roman Gold Mining, Technology and 3D Visualisation for Scientific Research in Archaeology, Roman Archaeology, and Airborne Laser Scanning (ALS)
The interpretation of archaeological features in LiDAR-derived Digital Elevation Models (DEM) is very dependent on visualization techniques. Different methods have been proposed to highlight micro-topographies, from the “simple”... more
The interpretation of archaeological features in LiDAR-derived Digital Elevation Models (DEM) is very dependent on visualization techniques. Different methods have been proposed to highlight micro-topographies, from the “simple” hill-shading, which can be easily computed in any GIS software, to more complex ones like Local Relief Models (LRMs). LRMs is a relevant visualization technique that allow us to discriminate between positive and negative micro-topographies at a local scale, representing real changes in elevation rather than calculations based on steepness and direction of slope or exposure to light. In general terms, this procedure first calculates a trend DEM and then subtracts it from the original DEM, producing a LRM. In this study we present a Morphological Relief Model (MRM) which uses the quadric edge collapse decimation algorithm to produce a course mesh similar to the original model but free of small morphological details and thus improving the effects of smoothing filters that are normally used to calculate the trend DEM.
Research Interests:
El propósito de este artículo es describir una estela descubierta en el municipio de Castrelo do Val (Ourense) y realizar un primer análisis sobre su iconografía, estilo y cronología. Esta estela presenta una serie de grabados muy... more
El propósito de este artículo es describir una estela descubierta en el municipio de Castrelo do Val (Ourense) y realizar un primer análisis sobre su iconografía, estilo y cronología. Esta estela presenta una serie de grabados muy semejantes a los de las estelas de guerrero del sudoeste y unas de escotaduras que confieren a la piedra un aspecto vagamente antropomorfo. Se propone la existencia de tres posibles momentos sucesivos de uso para este monumento; el más antiguo con grabados rupestres atlánticos, el segundo con una iconografía propia de las Estelas de Guerrero y un tercero en el que se realizan las escotaduras.
Research Interests:
[POR] Lino Tavares Dias e António Baptista Lopes referem a existência de um acampamento militar romano no alto da Serra do Marão, de nido por um recinto rectangular, ao qual estaria associado uma torre de planta quadrangular. Este... more
[POR] Lino Tavares Dias e António Baptista Lopes referem a existência de um acampamento militar romano no alto da Serra do Marão, de nido por um recinto rectangular, ao qual estaria
associado uma torre de planta quadrangular. Este possível acampamento foi como tal identificado por uma inscrição gravada sobre um penedo que se localiza nas proximidades onde supostamente se lê Castra Oresbi. A exiguidade dos dados arqueológicos apresentados levou-nos a realizar uma
revisão integral das evidências disponíveis através de pesquisa bibliográfica, prospeção arqueológica, aplicação de tecnologias geoespaciais e análise epigráfica. O objetivo deste trabalho passa por
avaliar o verdadeiro potencial arqueológico da zona e propor a sua reinterpretação.
Palavras-chave: Arqueologia; Epigra a; Fotogrametria; Deteção Remota.
[ENG] Lino Tavares Dias and António Baptista Lopes both report the existence of a Roman military camp on the summit of the Marão Mountain, defined by a rectangular enclosure, to which it would be
associated a quadrangular tower. It is possible camp have been identified as such by a rock-cut inscription located nearby, where supposedly one can read Castra Oresbi. The paucity of the existent archaeological data led us to conduct a full review of the available evidences through bibliographic research, archaeological
prospection, the application of geospatial technologies and epigraphic analysis. The objective of this work is to assess the true archaeological potential of the area and to propose its reinterpretation.
Keywords: Archaeology; Epigraphy; Photogrammetry; Remote sensing.
associado uma torre de planta quadrangular. Este possível acampamento foi como tal identificado por uma inscrição gravada sobre um penedo que se localiza nas proximidades onde supostamente se lê Castra Oresbi. A exiguidade dos dados arqueológicos apresentados levou-nos a realizar uma
revisão integral das evidências disponíveis através de pesquisa bibliográfica, prospeção arqueológica, aplicação de tecnologias geoespaciais e análise epigráfica. O objetivo deste trabalho passa por
avaliar o verdadeiro potencial arqueológico da zona e propor a sua reinterpretação.
Palavras-chave: Arqueologia; Epigra a; Fotogrametria; Deteção Remota.
[ENG] Lino Tavares Dias and António Baptista Lopes both report the existence of a Roman military camp on the summit of the Marão Mountain, defined by a rectangular enclosure, to which it would be
associated a quadrangular tower. It is possible camp have been identified as such by a rock-cut inscription located nearby, where supposedly one can read Castra Oresbi. The paucity of the existent archaeological data led us to conduct a full review of the available evidences through bibliographic research, archaeological
prospection, the application of geospatial technologies and epigraphic analysis. The objective of this work is to assess the true archaeological potential of the area and to propose its reinterpretation.
Keywords: Archaeology; Epigraphy; Photogrammetry; Remote sensing.