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FOVEON vs Bayer: Comparison of 3D reconstruction performances / Marinos Vlachos (2019)  

Public Titre : FOVEON vs Bayer: Comparison of 3D reconstruction performances Type de document : Article/Communication Auteurs : Marinos Vlachos, Auteur ; Dimitrios Skarlatos, Auteur ; Pierre Bodin, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2019 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 42-2/W9 Projets : 1-Pas de projet / Conférence : 3D-ARCH 2019, 8th International ISPRS Workshop on 3D Virtual Reconstruction and Visualization of Complex Architectures 06/02/2019 08/02/2019 Bergame Italie Open Access Proceedings Importance : 7 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse comparative [Termes IGN] chambre métrique [Termes IGN] image RVB [Termes IGN] précision géométrique (imagerie) [Termes IGN] précision radiométrique [Termes IGN] semis de points Résumé : (auteur) The main idea of this particular study was to validate if the new FOVEON technology implemented by sigma cameras can provide better overall results and outperform the traditional Bayer pattern sensor cameras regarding the radiometric information that records as well as the photogrammetric point cloud quality that can provide. Based on that, the scope of this paper is separated into two evaluations. First task is to evaluate the quality of information reconstructed during de-mosaicking step for Bayer pattern cameras by detecting potential additional colour distortion added during the de-mosaicking step, and second task is the geometric comparisons of point clouds generated by the photos by Bayer and FOVEON sensors against a reference point cloud. The first phase of the study is done using various de-mosaicking algorithms to process various artificial Bayern pattern images and then compare them with reference FOVEON images. The second phase of the study is carried on by reconstructing 3D point clouds of the same objects captured by a Bayer and a FOVEON sensor respectively and then comparing the various point clouds with a reference one, generated by a structured light hand-held scanner. The comparison is separated into two parts, where initially we evaluate five separate point clouds (RGB, Gray, Red, Green, Blue) for each camera sensor per site and then a second comparison is evaluated on colour classified RGB point cloud segments. Numéro de notice : C2019-075 Affiliation des auteurs : ENSG+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprs-archives-XLII-2-W9-755-2019 Date de publication en ligne : 31/01/2019 En ligne : https://doi.org/10.5194/isprs-archives-XLII-2-W9-755-2019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99713

Software comparison for underwater archaeological photogrammetric applications / Marinos Vlachos (2019)  

Public Titre : Software comparison for underwater archaeological photogrammetric applications Type de document : Article/Communication Auteurs : Marinos Vlachos, Auteur ; Louise Berger, Auteur ; Rose Mathelier, Auteur ; P. Agrafiotis, Auteur ; Dimitrios Skarlatos, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2019 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 42-2/W15 Projets : 3-projet - voir note / Conférence : CIPA 2019, 27th CIPA International Symposium, Documenting the past for a better future 01/09/2019 05/09/2019 Ávila Espagne OA ISPRS Archives Importance : 7 p. Note générale : bibliographie The contribution of M. Vlachos, P. Agrafiotis and D. Skarlatos is part of iMARECULTURE project (Advanced VR, iMmersive Serious Games and Augmented REality as Tools to Raise Awareness and Access to European Underwater CULTURal heritagE, Digital Heritage) that has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 727153. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] analyse comparative [Termes IGN] données localisées 3D [Termes IGN] logiciel de photogrammétrie [Termes IGN] scène sous-marine [Termes IGN] semis de points [Termes IGN] structure-from-motion Résumé : (auteur) This paper presents an investigation as to whether and how the selection of the SfM-MVS software affects the 3D reconstruction of submerged archaeological sites. Specifically, Agisoft Photoscan, VisualSFM, SURE, 3D Zephyr and Reality Capture software were used and evaluated according to their performance in 3D reconstruction using specific metrics over the reconstructed underwater scenes. It must be clarified that the scope of this study is not to evaluate specific algorithms or steps that the various software use, but to evaluate the final results and specifically the generated 3D point clouds. To address the above research issues, a dataset from the ancient shipwreck, laying at 45 meters below sea level, is used. The dataset is composed of 19 images having very small camera to object distance (1 meter), and 42 images with higher camera to object distance (3 meters) images. Using a common bundle adjustment for all 61 images, a reference point cloud resulted from the lower dataset is used to compare it with the point clouds of the higher dataset generated using the different photogrammetric packages. Following that, a comparison regarding the number of total points, cloud to cloud distances, surface roughness, surface density and a combined 3D metric was done to evaluate and see which one performed the best. Numéro de notice : C2019-074 Affiliation des auteurs : ENSG+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprs-archives-XLII-2-W15-1195-2019 Date de publication en ligne : 26/08/2019 En ligne : https://doi.org/10.5194/isprs-archives-XLII-2-W15-1195-2019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99700

Optimal site selection for sitting a solar park using multi-criteria decision analysis and geographical information systems / Andreas Georgiou in Geoscientific instrumentation methods and data systems, vol 5 n° 2 (July - December 2016)  

Public [article]  inGeoscientific instrumentation methods and data systems > vol 5 n° 2 (July - December 2016) . - pp 321 - 332 Titre : Optimal site selection for sitting a solar park using multi-criteria decision analysis and geographical information systems Type de document : Article/Communication Auteurs : Andreas Georgiou, Auteur ; Dimitrios Skarlatos, Auteur Année de publication : 2016 Article en page(s) : pp 321 - 332 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse multicritère [Termes IGN] Chypre [Termes IGN] énergie renouvelable [Termes IGN] parc solaire photovoltaïque Résumé : (auteur) Among the renewable power sources, solar power is rapidly becoming popular because it is inexhaustible, clean, and dependable. It has also become more efficient since the power conversion efficiency of photovoltaic solar cells has increased. Following these trends, solar power will become more affordable in years to come and considerable investments are to be expected. Despite the size of solar plants, the sitting procedure is a crucial factor for their efficiency and financial viability. Many aspects influence such a decision: legal, environmental, technical, and financial to name a few. This paper describes a general integrated framework to evaluate land suitability for the optimal placement of photovoltaic solar power plants, which is based on a combination of a geographic information system (GIS), remote sensing techniques, and multi-criteria decision-making methods. An application of the proposed framework for the Limassol district in Cyprus is further illustrated. The combination of a GIS and multi-criteria methods produces an excellent analysis tool that creates an extensive database of spatial and non-spatial data, which will be used to simplify problems as well as solve and promote the use of multiple criteria. A set of environmental, economic, social, and technical constrains, based on recent Cypriot legislation, European's Union policies, and expert advice, identifies the potential sites for solar park installation. The pairwise comparison method in the context of the analytic hierarchy process (AHP) is applied to estimate the criteria weights in order to establish their relative importance in site evaluation. In addition, four different methods to combine information layers and check their sensitivity were used. The first considered all the criteria as being equally important and assigned them equal weight, whereas the others grouped the criteria and graded them according to their objective perceived importance. The overall suitability of the study region for sitting solar parks is appraised through the summation rule. Strict application of the framework depicts 3.0 % of the study region scoring a best-suitability index for solar resource exploitation, hence minimizing the risk in a potential investment. However, using different weighting schemes for criteria, suitable areas may reach up to 83 % of the study region. The suggested methodological framework applied can be easily utilized by potential investors and renewable energy developers, through a front end web-based application with proper GUI for personalized weighting schemes. Numéro de notice : A2016-941 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.5194/gi-5-321-2016 Date de publication en ligne : 26/07/2016 En ligne : http://dx.doi.org/10.5194/gi-5-321-2016 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83412 [article]

A novel method for automating the checking and correction of digital elevation models using orthophographs / A. Georgopoulos in Photogrammetric record, vol 18 n° 102 (June - August 2003)  

Public [article]  inPhotogrammetric record > vol 18 n° 102 (June - August 2003) . - pp 156 - 163 Titre : A novel method for automating the checking and correction of digital elevation models using orthophographs Type de document : Article/Communication Auteurs : A. Georgopoulos, Auteur ; Dimitrios Skarlatos, Auteur Année de publication : 2003 Article en page(s) : pp 156 - 163 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] correction [Termes IGN] modèle mathématique [Termes IGN] modèle numérique de surface [Termes IGN] orthoimage Résumé : (Auteur) On décrit dans cet article un modèle mathématique complet qui traduit les écarts entre deux orthophotographies, réalisées à partir de photographies différentes, en corrections précises du modèle numérique des élévations (MNE). Ces corrections sont les écarts avec la surface réelle, de sorte qu'une fois appliquées au MNE existant, il en résulte un MNE plus précis. Le modèle mathématique opère directement, de façon rigoureuse et ne nécessite donc pas d'itérations. Les applications envisageables comprennent le contrôle des MNE obtenus automatiquement, l'affinement des MNE existants en utilisant des photographies aériennes et la mise à jour des orthophotographies établies avec des MNE antérieurs en profitant d'une nouvelle imagerie. Numéro de notice : A2003-138 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/0031-868X.t01-1-00015 En ligne : https://doi.org/10.1111/0031-868X.t01-1-00015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22434 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-03021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Orthophotograph production in urban areas: paper read at the Thompson symposium of the photogrammetric society held at the University of Durham on 19th April, 1998 / Dimitrios Skarlatos in Photogrammetric record, vol 16 n° 94 (October 1999 - March 2000)  

Public [article]  inPhotogrammetric record > vol 16 n° 94 (October 1999 - March 2000) . - pp 643 - 650 Titre : Orthophotograph production in urban areas: paper read at the Thompson symposium of the photogrammetric society held at the University of Durham on 19th April, 1998 Type de document : Article/Communication Auteurs : Dimitrios Skarlatos, Auteur Congrès : Thompson symposium of the photogrammetric society (19 avril 1998; Durham), Auteur Année de publication : 1999 Article en page(s) : pp 643 - 650 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Orthophotographie, orthoimage [Termes IGN] cartographie [Termes IGN] correction [Termes IGN] milieu urbain [Termes IGN] orthophotographie [Termes IGN] système d'information géographique Résumé : (Auteur) Recherche de solutions pour les problèmes dédoublements dans la cartographie de l'orthophotographie en zone urbaine. Deux méthodes sont analysées. Des sous-programmes en langage C spécialement adaptés aux problèmes des zones urbaines sont écrits puis évalués en terme de précision des résultats. Des difficultés subsistent. Numéro de notice : A1999-051 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/0031-868X.00144 En ligne : https://doi.org/10.1111/0031-868X.00144 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26239 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-99021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Three dimensional visualization of the built environment using digital orthophotography / A. Georgopoulos in Photogrammetric record, vol 15 n° 90 (October 1997 - March 1998)  

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