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Auteur Marinos Vlachos |
Documents disponibles écrits par cet auteur (2)
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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 pointsRésumé : (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)
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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-motionRésumé : (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