- Université de Toulon / Campus de La Garde - La Valette
Avenue de l’Université 83130 LA GARDE
SEATECH / Batiment X / bureau 166
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ABSTRACT ROV 3D project aims at developing innovative tools which link underwater photogrammetry and acoustic measurements from an active underwater sensor. The results will be 3D high resolution surveys of underwater sites. The new means... more
ABSTRACT ROV 3D project aims at developing innovative tools which link underwater photogrammetry and acoustic measurements from an active underwater sensor. The results will be 3D high resolution surveys of underwater sites. The new means and methods developed aim at reducing the investigation time in situ, and proposing comprehensive and non-intrusive measurement tools for the studied environment. In this paper, we apply a pre-processing pipe line to increase the SIFT and SURF descriptors extraction quality in order to solve the problem of surveying an underwater archaeological wreck in a very high condition of turbidity. We work in the Rhodano river, in south of France on a roman wreck with 20 centimeters visibility. Under these conditions a standard process is not efficient and water turbidity is a real obstacle to feature extraction. Nevertheless the mission was not dedicated to an exhaustive survey of the wreck, but only a test to show and evaluate the feasibility. The results are positive even if the main problem seems now to be the time processing, indeed the poor visibility increase drastically the number of photographs.
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ABSTRACT Since 19,3 archeology and computer science have developed close ties in Marseille. Two departments (computer science and archaeology) from the French National Centre for Scientific Research (CNRS) in Marseille started working... more
ABSTRACT Since 19,3 archeology and computer science have developed close ties in Marseille. Two departments (computer science and archaeology) from the French National Centre for Scientific Research (CNRS) in Marseille started working together and laid the cornerstone of the Computer Applications and Quantitative Methods in Archaeology (CAA) community. Marseille also has the advantage of being located in a very interesting place on the Mediterranean Sea and being the home to several famous laboratories, such as the French Cultural Heritage Department (DRASSM) or private companies like COMER. In 1980 they performed a series of explorations of a deep-sea wreck with the help of COMER and DRASSM. More recently, ten years ago, the Centre d'Océanologie de Marseille (COM) started using underwater photogrammetry to survey and monitor red coral populations in situ. In this paper we present new advances in underwater photogrammetry for archaeology and marine biology based on forty years of experience. The survey described in this article does not only discuss the acquisition of 3D points in difficult conditions but also linking archaeological knowledge to the surveyed geometry. This approach needed to combine automatic data processing and offered the opportunity to experts, archaeologists or biologists, to insert knowledge in the process. After an introduction to the history of computer science and archaeology, we will present related work in underwater archaeology and marine biology. The last section is dedicated to two recent experiments in Marseille, based on recent developments in automatic photogrammetry: a World War II plane wreck, surveyed using both acoustic and optical sensors, and a survey used to monitor red coral growth over several years.
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Since 1973 archaeology and computer science have developed close ties in Marseille. Two departments (computer science and archaeology) from the French National Centre for Scientific Research (CNRS) in Marseille started working together... more
Since 1973 archaeology and computer science have developed close ties in Marseille. Two departments (computer science and archaeology) from the French National Centre for Scientific Research (CNRS) in Marseille started working together and laid the cornerstone of the Computer Applications and Quantitative Methods in Archaeology (CAA) community. Marseille also has the advantage of being located in a very interesting place on the Mediterranean Sea and being the home to several famous laboratories, such as the French Cultural Heritage Department (DRASSM) or private companies like COMEX. In 1980 they performed a series of explorations of a deep-sea wreck with the help of COMEX and DRASSM. In this paper we present new advances in underwater photogrammetry for archaeology based on forty years of experience. The survey described in this article does not only discuss the acquisition of 3D points in difficult conditions but also linking archaeological knowledge to the surveyed geometry. This...
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The problem of merging multiple sources information is central in several domains of computer science. In knowledge representation for artificial intelligence, several approaches have been proposed for merging propositional bases. However... more
The problem of merging multiple sources information is central in several domains of computer science. In knowledge representation for artificial intelligence, several approaches have been proposed for merging propositional bases. However none of these ...
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We present here the first step of an interdisciplinary work dealing with underwater photogrammetry and archaeological data management. In the framework of a phd project we develop a set of tools from underwater data capture to 3D... more
We present here the first step of an interdisciplinary work dealing with underwater photogrammetry and archaeological data management. In the framework of a phd project we develop a set of tools from underwater data capture to 3D underwater GIS for archaeological excavation. The phd project, managed by Julien Seinturier, is monitored by Odile Papini for the data fusion aspect and Pierre Drap for the underwater photogrammetrical aspect. The project is financed together by the French Region PACA and the COMEX firm, specialized in underwater exploration. In this paper we present the first step experimentation on and underwater archaeological site in Corsica managed by the DRASSM and excavated under the scientific responsibility of Franca Cibecchini. After a brief archaeological presentation of the site we'll start by a description of the photogrammetric survey phase, made during the excavation, in the same time that a traditional manual survey make thanks to the shallowness site as...
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High accuracy underwater inspections are getting more and more important in the underwater industry where time and cost optimization represent nowadays the main innovation drivers. The subsea industry is undergoing a digital... more
High accuracy underwater inspections are getting more and more important in the underwater industry where time and cost optimization represent nowadays the main innovation drivers. The subsea industry is undergoing a digital transformation process and for this reason, methods that can provide real-time accurate 3D digital measurements are increasingly demanded. This paper provides a short review of the main techniques currently used in subsea metrology to then present an experimental study carried out to evaluate the accuracy potential of three vision-based techniques well-known in photogrammetry, namely visual odometry with and without windowed bundle adjustment, and keyframe based simultaneous localization and mapping (SLAM). The accuracy evaluation is done using an ORUS 3D® subsea photogrammetry system using a certified 3D underwater reference test-field available at COMEX facilities, whose spatial coordinates are known with sub-millimetre accuracy. A critical assessment of resul...
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... The Sixth International Conference on Computer Graphics and Artificial Intelligence, France (2003). Archaeological 3D Modelling using digital photogrammetry and Expert System. The case study of Etruscan amphorae. ...
Résumé Ce papier constitue une premiere étude sur la réversibilité des opérations de fusion d'informations avec priorités explicites. Nous nous restreignons au cas ou les informations provenant de différentes... more
Résumé Ce papier constitue une premiere étude sur la réversibilité des opérations de fusion d'informations avec priorités explicites. Nous nous restreignons au cas ou les informations provenant de différentes sources sont représentées en calcul propositionnel ...
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ABSTRACT This article describes on-going developments of the VENUS European Project (Virtual ExploratioN of Underwater Sites). The project main goal is to provide underwater archaeologists with a suite of automatic tools to produce... more
ABSTRACT This article describes on-going developments of the VENUS European Project (Virtual ExploratioN of Underwater Sites). The project main goal is to provide underwater archaeologists with a suite of automatic tools to produce georeferenced cartographic data including archaeologically relevant information. Automatic processing goes from the early data acquisition phase to the building of 3D models of the site and of the objects lying at the site to the final virtual reality rendering. The paper focuses on the first part of the process, and it describes the applied methodological approach and the obtained results from the Pianosa 2006 mission. In particular, the data acquisition system comprises a Remotely Operated Vehicle (ROV) collecting optical data for photogrammetric processing and georeferenced through an acoustical positioning system. The data are saved in a specific format that makes available the optical image together with the ROV navigation data. The optical data have been processed through standard photogrammetric techniques to obtain a 3D Digital Terrain Model (DTM). Archaeological artefacts at the site have been identified on the DTM, and archaeological-based information has been incorporated in order to produce 3D virtual models of the objects to be modelled and inserted in the final representation. Metadata information, including the processing flow to obtain the virtual model of the artefacts are stored in a purposely developed data-base system. In this way the archaeologists have at their disposal a suite of cartographic information related to the site, which can be visualized one at the time or superimposed one to the other for analysis or evaluation purposes. Evaluation of the results must take into account two different aspects: the first is the accuracy in the 3D model reconstruction and in the geographical positioning, measured through standard metric; the second is the evaluation of the archaeologists regarding the use of the final cartographic instrument. The experimentation at Pianosa, where the seabed was mostly flat, shows bias of the order of 10 cm in elevation and of order of … in x-y coordinates. The final cartographic information has been produced under archaeological guidance to obtain drawings similar to those whom the archaeologists are familiar with, with the added value of being quantitatively accurate.
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In this article, we present an approach for a deep-sea survey based on photogrammetry using a remotely operated underwater vehicle (ROV). A hybrid technique gives us real-time results, sufficient for piloting the ROV from the surface... more
In this article, we present an approach for a deep-sea survey based on photogrammetry using a remotely operated underwater vehicle (ROV). A hybrid technique gives us real-time results, sufficient for piloting the ROV from the surface vessel and ensuring a uniform coverage of the site, as well as recording high-definition images using an onboard computer that will later provide a survey with millimetric precision. The measurements are made without any contact and are noninvasive. The time required on-site is minimal and corresponds to the time needed by the ROV to cover the zone. With the photos taken at a frame rate synchronized at 10Hz, the ROV required 2 hours to perform the experiment presented in this article: the survey of the Roman shipwreck Cap Bénat 4 , at a depth of 328m. The approach presented in this work was developed in the scope of the ROV 3D project. This project, financed by the Fond Unique Interministériel (FUI) for 3 years, brings together two industrial partners a...
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... 2000], PAULA (http://www.sfb632.uni-potsdam.de/~d1/paula/doc/), XStandoff [Sperberg-McQueen 2000]. These projects rely on graph-based model. They generally propose toolkits for multi-level annotation by means of libraries of data and... more
... 2000], PAULA (http://www.sfb632.uni-potsdam.de/~d1/paula/doc/), XStandoff [Sperberg-McQueen 2000]. These projects rely on graph-based model. They generally propose toolkits for multi-level annotation by means of libraries of data and annotation management. ...
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 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, one of the best... 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,
one of the best preserved rural medieval settlements in the entire Middle East).
The Shawbak archaeological project is a specific and integrated project between
medieval archaeological research and computer vision done thanks to a long
cooperation between University of Florence and CNRS, LSIS, Marseille.
Focusing mainly on stratigraphical analysis of upstanding structures we provide
archaeologists with two-step pipeline. First a survey process using
photogrammetry, both in a traditional way with additional annotations and
using the most advanced technique to obtain dense maps and then a tool for
statistical analysis. Two main applications are presented here, stratigraphy
analysis with Harris matrix computed on the fly from the 3D viewer and
statistical tools, clustering operation on ashlar in order to show new
relationships between the measured artifacts.
All these developments are written in Java within Arpenteur framework[
progress towards a 3D Geographical Information System (GIS) dedicated to
Cultural Heritage with a specific focus application on the Castle of Shawbak,
one of the best preserved rural medieval settlements in the entire Middle East).
The Shawbak archaeological project is a specific and integrated project between
medieval archaeological research and computer vision done thanks to a long
cooperation between University of Florence and CNRS, LSIS, Marseille.
Focusing mainly on stratigraphical analysis of upstanding structures we provide
archaeologists with two-step pipeline. First a survey process using
photogrammetry, both in a traditional way with additional annotations and
using the most advanced technique to obtain dense maps and then a tool for
statistical analysis. Two main applications are presented here, stratigraphy
analysis with Harris matrix computed on the fly from the 3D viewer and
statistical tools, clustering operation on ashlar in order to show new
relationships between the measured artifacts.
All these developments are written in Java within Arpenteur framework[
ROV 3D project aims at developing innovative tools which link underwater photogrammetry and acoustic measurements from an active underwater sensor. The results will be 3D high resolution surveys of underwater sites. The new means and... more
ROV 3D project aims at developing innovative tools which link underwater photogrammetry and acoustic measurements from an active underwater sensor. The results will be 3D high resolution surveys of underwater sites. The new means and methods developed aim at reducing the investigation time in situ, and proposing comprehensive and non-intrusive measurement tools for the studied environment.
In this paper, we apply a pre-processing pipe line to increase the SIFT and SURF descriptors extraction quality in order to solve the problem of surveying an underwater archaeological wreck in a very high condition of turbidity. We work in the Rhodano river, in south of France on a roman wreck with 20 centimeters visibility. Under these conditions a standard process is not efficient and water turbidity is a real obstacle to feature extraction. Nevertheless the mission was not dedicated to an exhaustive survey of the wreck, but only a test to show and evaluate the feasibility.
The results are positive even if the main problem seems now to be the time processing, indeed the poor visibility increase drastically the number of photographs
In this paper, we apply a pre-processing pipe line to increase the SIFT and SURF descriptors extraction quality in order to solve the problem of surveying an underwater archaeological wreck in a very high condition of turbidity. We work in the Rhodano river, in south of France on a roman wreck with 20 centimeters visibility. Under these conditions a standard process is not efficient and water turbidity is a real obstacle to feature extraction. Nevertheless the mission was not dedicated to an exhaustive survey of the wreck, but only a test to show and evaluate the feasibility.
The results are positive even if the main problem seems now to be the time processing, indeed the poor visibility increase drastically the number of photographs