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A photogrammetric technique for acquiring accurate head surfaces of newborn infants for optical tomography under clinical conditions / M. Abreu De Souza in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 253 - 271 Titre : A photogrammetric technique for acquiring accurate head surfaces of newborn infants for optical tomography under clinical conditions Type de document : Article/Communication Auteurs : M. Abreu De Souza, Auteur ; S. Robson, Auteur ; J. Hebden, Auteur Année de publication : 2012 Article en page(s) : pp 253 - 271 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] enfant [Termes IGN] imagerie médicale [Termes IGN] photogrammétrie métrologique [Termes IGN] reconstruction 3D [Termes IGN] tomographie [Termes IGN] visualisation 3D Résumé : (Auteur) Optical tomography (OT) generates 3D images that can be used to monitor blood volume and oxygenation in the brains of newborn infants safely and non-invasively at the bedside. OT image reconstruction requires that source optical fibres and detector bundles (optodes) are brought into optical contact with the head and that the scalp surface geometry and optode positions for each individual infant are accurately known. The photogrammetric challenge is to create affordable tools that can be employed on newborn, and often severely ill, infants in an intensive care environment with a minimum level of intrusion. The paper describes the application and development of a system capable of mapping each individual infant head surface in the clinic and coordinating optode positions and orientations during optical tomography scans. The system developed includes a combination of stereo and multi-photo photogrammetry with a pair of digital SLR cameras and a laser dot projector. A bundle adjustment of the sequential stereo-image pairs is used to generate accurate head meshes that are combined with a photogrammetric network of images from a single camera to bring optodes mounted on a deformable helmet structure into a common coordinate system. This data can then be used in the 3D reconstruction of blood flow in the infant head. Numéro de notice : A2012-461 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00686.x Date de publication en ligne : 18/09/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00686.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31907 [article]

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Lidar strip adjustment with automatically reconstructed roof shapes / M. Rentsch in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 272 - 292 Titre : Lidar strip adjustment with automatically reconstructed roof shapes Type de document : Article/Communication Auteurs : M. Rentsch, Auteur ; Peter Krzystek, Auteur Année de publication : 2012 Article en page(s) : pp 272 - 292 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] compensation par bloc [Termes IGN] densité des points [Termes IGN] données lidar [Termes IGN] erreur systématique [Termes IGN] étalonnage d'instrument [Termes IGN] lidar à retour d'onde complète [Termes IGN] ligne de visée [Termes IGN] photogrammétrie terrestre [Termes IGN] points homologues [Termes IGN] reconstruction 3D du bâti [Termes IGN] semis de points [Termes IGN] toit Résumé : (Auteur) In recent years, the performance of lidar systems has steadily improved due to an increase in the achievable point density. The main error sources affecting the quality of lidar-derived secondary products such as digital terrain models (DTMs) and digital surface models (DSMs) are the result of systematic errors coming from insufficient boresight calibration. The effects of boresight misalignments are visually recognised as discrepancies of the laser point clouds at selected objects (such as building roofs) in overlapping areas of neighbouring lidar strips. In this work, a strip adjustment method is presented that corrects the systematic errors of the laser point cloud using five strip parameters (three shifts plus two angular corrections for heading and roll). The strip adjustment procedure uses 2D and 3D tie elements and takes advantage of a new 3D measurement technique applied to building roofs. The strip adjustment method is applied to three different datasets, consisting of conventional first/last pulse and full-waveform data. The results show that systematic discrepancies are typical for datasets that have already been processed by the flight companies. These errors can be reduced by more than 70% by applying the new strip adjustment approach. Preliminary investigations indicate that a higher laser point density and the inclusion of intensity and pulse width within full-waveform lidar data lead to better results. Numéro de notice : A2012-462 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00690.x Date de publication en ligne : 18/09/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00690.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31908 [article]

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Assessment of a photogrammetric approach for urban DSM extraction from tri-stereoscopic satellite imagery / F. Tack in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 293 - 310 Titre : Assessment of a photogrammetric approach for urban DSM extraction from tri-stereoscopic satellite imagery Type de document : Article/Communication Auteurs : F. Tack, Auteur ; Rudi Goossens, Auteur ; G. Buyuksalih, Auteur Année de publication : 2012 Article en page(s) : pp 293 - 310 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale [Termes IGN] distorsion d'image [Termes IGN] extraction automatique [Termes IGN] image à haute résolution [Termes IGN] image Ikonos [Termes IGN] image tri-stéréoscopique [Termes IGN] Istanbul (Turquie) [Termes IGN] modèle numérique de surface Résumé : (Auteur) Built-up environments are extremely complex for 3D surface modelling purposes. The main distortions that hamper 3D reconstruction from 2D imagery are image dissimilarities, concealed areas, shadows, height discontinuities and discrepancies between smooth terrain and man-made features. A methodology is proposed to improve automatic photogrammetric extraction of an urban surface model from high resolution satellite imagery with the emphasis on strategies to reduce the effects of the cited distortions and to make image matching more robust. Instead of a “standard” stereoscopic approach, a digital surface model is derived from tri-stereoscopic satellite imagery. This is based on an extensive multi-image matching strategy that fully benefits from the geometric and radiometric information contained in the three images. The bundled triplet consists of an IKONOS along-track pair and an additional near-nadir IKONOS image. For the tri-stereoscopic study a densely built-up area, extending from the centre of Istanbul to the urban fringe, is selected. The accuracy of the model extracted from the IKONOS triplet, as well as the model extracted from only the along-track stereopair, are assessed by comparison with 3D check points and 3D building vector data. Numéro de notice : A2012-463 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00690.x Date de publication en ligne : 18/09/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00690.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31909 [article]

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Automatic ICP-based global matching of free-form linear features / D. Vassilaki in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 311 - 329 Titre : Automatic ICP-based global matching of free-form linear features Type de document : Article/Communication Auteurs : D. Vassilaki, Auteur ; C. Ioannidis, Auteur ; A. Stamos, Auteur Année de publication : 2012 Article en page(s) : pp 311 - 329 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] algorithme ICP [Termes IGN] appariement géométrique [Termes IGN] géoréférencement [Termes IGN] ligne caractéristique [Termes IGN] objet géographique linéaire Résumé : (Auteur) The geometric exploitation of linear features has been investigated in various remote sensing and geospatial problems. This paper introduces a novel and general method based on the iterative closest point (ICP) algorithm for the global matching of heterogeneous free-form linear features of the same (2D–2D, 3D–3D), or different, (2D–3D) dimensionality. No constraints are imposed either on the transformation, the projection type or on the geometric nature of the features. The method assumes no prior knowledge of the relative position of the features, or of point correspondences, and is tested with various simulated and real-world heterogeneous data. Numéro de notice : A2012-464 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00692.x Date de publication en ligne : 18/09/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00692.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31910 [article]

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A multi-resolution hybrid approach for building model reconstruction from lidar data / M. Satari in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 330 - 359 Titre : A multi-resolution hybrid approach for building model reconstruction from lidar data Type de document : Article/Communication Auteurs : M. Satari, Auteur ; F. Samadzadegan, Auteur ; A. Azizi, Auteur ; Hans-Gerd Maas, Auteur Année de publication : 2012 Article en page(s) : pp 330 - 359 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] architecture orientée modèle [Termes IGN] classification floue [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] photogrammétrie terrestre [Termes IGN] reconstruction 3D du bâti [Termes IGN] semis de points [Termes IGN] séparateur à vaste marge [Termes IGN] toit [Termes IGN] transformation de Hough Résumé : (Auteur) In this paper, a multi-resolution hybrid approach is proposed for the reconstruction of building models from point clouds of lidar data. The detection of the main roof planes is obtained through a polyhedral approach, whereas the models of appended parts, in this case the dormers, are reconstructed by adopting a model-driven approach. Clustering of the roof points in a multi-resolution space is based on the fuzzy c-mean in the polyhedral section of this hybrid approach. A weighted plane algorithm is developed in order to determine the planes of each cluster. The verification of planes between multi-resolution spaces adopts a method based on a least squares support vector machine that, in the model-driven section, is applied for detecting types of projecting structures. A method is then developed to determine the dormer models’ parameters. Finally, the detection of boundary roof lines is obtained through a customised fuzzy Hough transform. The paper outlines the concept of the algorithms and the processing chain, and illustrates the results obtained by applying the technique to buildings of different complexities. Numéro de notice : A2012-465 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00688.x Date de publication en ligne : 18/09/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00688.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31911 [article]

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Photogrammetric terminology: Second edition / P. Newby in Photogrammetric record, vol 27 n° 139 (September - November 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 139 (September - November 2012) . - pp 360 - 386 Titre : Photogrammetric terminology: Second edition Type de document : Article/Communication Auteurs : P. Newby, Auteur Année de publication : 2012 Article en page(s) : pp 360 - 386 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie [Termes IGN] anglais (langue) [Termes IGN] géomatique [Termes IGN] photogrammétrie [Termes IGN] terminologie Résumé : (Auteur) This contribution offers a considerably expanded and updated edition of the original “Terminology Guide” which was published in The Photogrammetric Record in 2007 and was subsequently adopted as an official document of the International Society for Photogrammetry and Remote Sensing. Revision and correction began as soon as the previous version was finalised for publication, and has continued ever since, in the light of further experience of the developing technology and of authors’ contributions, and with the help and support of the editorial team, authors and readers worldwide. Once again, the aim is to help authors and editors in preparing contributions for publication in the Record; and it is hoped that the new listing will again secure wide acceptance and thus both engender and facilitate consistency and correctness in the global geomatics literature. A short discussion of the background and the process of compilation is followed by the listing itself, in the form of a lengthy Appendix to the text. Numéro de notice : A2012-466 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00693.x Date de publication en ligne : 16/07/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00693.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31912 [article]

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