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The use of the terrestrial photogrammetry in reverse engineering applications / Naci Yastikli in International journal of 3-D information modeling, vol 4 n° 2 (April - June 2015)  

Public [article]  inInternational journal of 3-D information modeling > vol 4 n° 2 (April - June 2015) . - pp 48 - 57 Titre : The use of the terrestrial photogrammetry in reverse engineering applications Type de document : Article/Communication Auteurs : Naci Yastikli, Auteur ; Zehra Erisir, Auteur ; Pelin Altintas, Auteur ; Tugba Cak, Auteur Année de publication : 2015 Article en page(s) : pp 48 - 57 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] modélisation 3D [Termes IGN] navire [Termes IGN] photogrammétrie métrologique [Termes IGN] photogrammétrie terrestre [Termes IGN] PhotoModeler [Termes IGN] rétro-ingénierie [Termes IGN] semis de points [Termes IGN] surveillance Résumé : (auteur) The reverse engineering applications has gained great momentum in industrial production with developments in the fields of computer vision and computer-aided design (CAD). The reproduction of an existing product or a spare part, reproduction of an existing surface, elimination of the defect or improvement of the available product are the goals of industrial reverse engineering applications. The first and the most important step in reverse engineering applications is the generation of the three dimension! (3D) metric model of an existing product in computer environment. After this stage, many operations such as the preparation of molds for mass production, the performance testing, the comparison of the existing product with other products and prototypes which are available on the market are performed by using the generated 3D models. In reverse engineering applications, the laser scanner system or digital terrestrial photogrammetry methods, also called contactless method, are preferred for the generation of the 3D models. In particular, terrestrial photogrammetry has become a popular method since require only photographs for the 3-dimensional drawing, the generation of the dense point cloud using the image matching algorithms and the orthoimage generation as well as its low cost. ln this paper, an industrial application of 3D information modelling is presented which concerns the measurement and 3D metric modelling of the ship mode!. The possible usage of terrestrial photogrammetty in reverse engineering application is investigated based on low cost photogrammetric system. The main aim was the generation of the dense point cloud and 3D line drawing of the ship model by using terrestrial photogrammetty, for the production of the ship in real size as a reverse engineering application. For this purpose, the images were recorded with digital SLR camera and orientations have been performed. Then 3D line drawing operations, point cloud and orthoimage generation have been accomplished by using PhotoModeler software. As a result of the proposed terrestrial photogrammetric steps, 0.5 mm spaced dense point cloud and orthoimage have been generated The obtained results from experimental study were discussed and possible use of proposed methods was evaluated for reverse engineering application. Numéro de notice : A2015-587 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.4018/IJ3DIM.2015040104 En ligne : http://doi.org/10.4018/IJ3DIM.2015040104 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77863 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
138-2015021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Assessment of interferometric DEMs from TerraSAR-X stripmap and spotlight stereopairs: case study in Istanbul / G. Seferick Umut in Photogrammetric record, vol 29 n° 146 (June - August 2014)  

Public [article]  inPhotogrammetric record > vol 29 n° 146 (June - August 2014) . - pp 224 - 240 Titre : Assessment of interferometric DEMs from TerraSAR-X stripmap and spotlight stereopairs: case study in Istanbul Type de document : Article/Communication Auteurs : G. Seferick Umut, Auteur ; Naci Yastikli, Auteur Année de publication : 2014 Article en page(s) : pp 224 - 240 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] analyse comparative [Termes IGN] couple stéréoscopique [Termes IGN] image radar moirée [Termes IGN] image TerraSAR-X [Termes IGN] Istanbul (Turquie) [Termes IGN] mode spotlight [Termes IGN] modèle numérique de terrain [Termes IGN] photographie aérienne Résumé : (Auteur) TerraSAR-X (TSX) has led to a new era for synthetic aperture radar (SAR) imaging, offering high-resolution (1 m) data that was not previously available from space. The TSX X-band sensor can be operated in three interferometrically compatible imaging modes: Stripmap (SM), high-resolution Spotlight (HS) and ScanSAR. Due to the low resolution of ScanSAR (16 to 30 m), SM and HS images are preferred for resolution-based applications. This paper attempts to validate and compare the digital elevation models (DEMs) derived from TSX SM and HS image pairs. Digital surface models (DSMs) were generated by interferometry in a part of Istanbul with a variety of ground types. These DSMs were converted to DEMs by filtering and then compared with a reference DEM produced from aerial photographs. The quality assessment was performed using advanced analyses concerned with accuracy and morphologic detail. The results of both absolute and relative accuracy analyses clearly reveal that the quality of the TSX HS DEM is better than SM and very consistent with the reference model. Numéro de notice : A2014-282 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12062 Date de publication en ligne : 15/06/2014 En ligne : https://doi.org/10.1111/phor.12062 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33185 [article]