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Marseille, France

Mahiddine A.,French National Center for Scientific Research | Seinturier J.,French National Center for Scientific Research | Peloso D.,French National Center for Scientific Research | Boi J.-M.,French National Center for Scientific Research | And 3 more authors.
Proceedings of the 2012 18th International Conference on Virtual Systems and Multimedia, VSMM 2012: Virtual Systems in the Information Society | Year: 2012

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 © 2012 IEEE. Source


Drap P.,CNRS Systems and Information Sciences Lab LSIS | Merad D.,CNRS Systems and Information Sciences Lab LSIS | Seinturier J.,CNRS Systems and Information Sciences Lab LSIS | Mahiddine A.,CNRS Systems and Information Sciences Lab LSIS | And 5 more authors.
Proceedings of the DigitalHeritage 2013 - Federating the 19th Int'l VSMM, 10th Eurographics GCH, and 2nd UNESCO Memory of the World Conferences, Plus Special Sessions fromCAA, Arqueologica 2.0 et al. | Year: 2013

Since 1973 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 COMEX. In 1980 they performed a series of explorations of a deep-sea wreck with the help of COMEX 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. © 2013 IEEE. Source


Martinez Ferreras V.,University of Barcelona | Capelli C.,University of Genoa | Jezegou M.-P.,DRASSM | Salvat M.,Mairie de Port Vendres | And 2 more authors.
International Journal of Nautical Archaeology | Year: 2015

The Port-Vendres 4 shipwreck is evidence of coastal export trade between Hispania Citerior and Narbonne in 40/30 BC. The cargo is made up of a particular assemblage of Roman wine amphoras (Pascual 1, Dressel 1B and Lamboglia 2) destined for Gallic markets. Archaeological and archaeometric analyses conducted on a selection of the amphoras allowed the provenance of the cargo to be identified as Hispania Citerior and the central-southern Tyrrhenian coast of Italy. Iluro and/or Baetulo are proposed as the ports of departure, enabling the reconstruction of the trade route and the historical and economic significance of this shipwreck. © 2015 Nautical Archaeology Society. Source


Magny M.,French National Center for Scientific Research | Arnaud F.,University of Savoy | Billaud Y.,DRASSM | Marguet A.,DRASSM
Journal of Quaternary Science | Year: 2012

On the basis of sedimentological analysis of two cores taken at Chatillon, Lake Le Bourget (northern French Pre-Alps), and well dated by radiocarbon dates in addition to tree ring dates obtained from an archaeological layer, this paper presents a high-resolution lake-level record for the period 4500-3500cal. a BP. The collected data provide evidence of a complex palaeohydrological (climatic) oscillation spanning the ca. 4300-3850cal. BP time interval, with major lake-level maxima at ca. 4200 and 4050-3850cal. a BP separated by a lowering episode around 4100cal. a BP. The lake-level highstands observed at Chatillon between 4300 and 3850cal. BP appear to be synchronous with (i) a major flooding period recorded in deep cores from the large lakes Le Bourget and Bodensee, and (ii) glacier advance and tree line decline in the Alps. Such wetter and cooler climatic conditions in west-central Europe around 4000cal. a BP may have been a nonlinear response to decrease and seasonal changes in insolation. They may also provide a possible explanation for the general abandonment of prehistoric lake dwellings north of the Alps between 4360 and 3750cal. a BP. © 2012 John Wiley & Sons, Ltd. Source


Gracias N.,University of Girona | Ridao P.,University of Girona | Garcia R.,University of Girona | Escartin J.,University Paris Diderot | And 15 more authors.
OCEANS 2013 MTS/IEEE Bergen: The Challenges of the Northern Dimension | Year: 2013

This paper describes the use of a research-driven, highly reconfigurable autonomous underwater vehicle for surveying the site of the historical shipwreck of La Lune. This wreck, from the XVII century, lies in 90m of water near the coast of Toulon in France. The goal of this survey was to create a fast but detailed map of the site, to serve as a base map for subsequent archaeological intervention. The paper overviews the survey setup and the methods used to generate a high resolution optical map. It also highlights some of the important advantages that lightweight AUVs present for archaeological survey missions in terms of operational costs, survey time, the quality of both the acquired data and the mapping outcome, and access to deep sites that are not reachable by traditional archaeological methods © 2013 IEEE. Source

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