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Auteur H. Ruther |
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Laser scanning in heritage documentation: The scanning pipeline and its challenges / H. Ruther in Photogrammetric Engineering & Remote Sensing, PERS, vol 78 n° 4 (April 2012)
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Titre : Laser scanning in heritage documentation: The scanning pipeline and its challenges Type de document : Article/Communication Auteurs : H. Ruther, Auteur ; R. Bhurtha, Auteur ; C. Held, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 309 - 316 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] Afrique du sud (état)
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] patrimoine culturel
[Termes IGN] semis de points
[Termes IGN] TanzanieRésumé : (Auteur) In an attempt to show the complexity of terrestrial laser scanning of heritage sites and dispel the not infrequently found perception of a largely automated tool with close to real time processing capabilities, the individual steps of the data acquisition and processing pipeline, including registration, point cloud cleaning, surface reconstruction, hole filling, texturing and final output are discussed. Emphasized are areas in which further development and research are desirable. A brief discussion of the concepts and implementation of the African Cultural Heritage Sites and Landscapes Project, as executed by the Zamani Research Group at the University of Cape Town, is incorporated into the paper. This database integrates spatial and non-spatial data and focuses on architectural heritage sites and cultural landscapes. The spatial data comprises of 3D laser scans, GIS's for each site and its environment, stereo images, panoramas, ground plans, elevations and sections derived from laser scan models, contextual photography and videos as well as 3D landscape models. The database is primarily designed as a resource for research and higher education. However, the spatial data acquired for the project are presently used in a number of restoration and conservation projects. An important further objective is the creation of a permanent digital record. The project, funded by the Andrew W. Mellon Foundation, is a joint initiative of the Zamani Research Group at the University of Cape Town and JStor, New York. Numéro de notice : A2012-176 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.78.4.309 En ligne : https://doi.org/10.14358/PERS.78.4.309 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31623
in Photogrammetric Engineering & Remote Sensing, PERS > vol 78 n° 4 (April 2012) . - pp 309 - 316[article]Laser-scanning and heritage / H. Ruther in GIM international, vol 21 n° 5 (May 2007)
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Titre : Laser-scanning and heritage Type de document : Article/Communication Auteurs : H. Ruther, Auteur Année de publication : 2007 Article en page(s) : pp 14 - 17 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] patrimoine immobilier
[Termes IGN] site historique
[Termes IGN] stockage de données
[Termes IGN] télémètre laser aéroporté
[Termes IGN] télémètre laser terrestreRésumé : (Auteur) The March issue of GIM International carried the response of manufacturers of laser-scanning sensors and software to remarks made in the Insider’s View column on shortcomings of this technology in the spatial documentation of heritage sites. Based on his long-term experience in capturing heritage sites in Africa, Professor Rüther explains there is still ample room for development, a challenge for both academic and manufacturer. Copyright Reed Business Information Numéro de notice : A2007-173 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28536
in GIM international > vol 21 n° 5 (May 2007) . - pp 14 - 17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-07051 SL Revue Centre de documentation Revues en salle Disponible Application of snakes and dynamic programming optimisation technique in modeling of buildings in informal settlement areas / H. Ruther in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 4 (July - August 2002)
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Titre : Application of snakes and dynamic programming optimisation technique in modeling of buildings in informal settlement areas Type de document : Article/Communication Auteurs : H. Ruther, Auteur ; H.M. Martine, Auteur ; E.G. Mtalo, Auteur Année de publication : 2002 Article en page(s) : pp 269 - 282 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] contour
[Termes IGN] détection du bâti
[Termes IGN] modèle mathématique
[Termes IGN] modèle numérique de surface
[Termes IGN] orthophotographie
[Termes IGN] photographie aérienne
[Termes IGN] processeurRésumé : (Auteur) This paper presents a novel approach to semiautomatic building extraction in informal settlement areas from aerial photographs. The proposed approach uses a strategy of delineating buildings by optimising their approximate building contour position. Approximate building contours are derived automatically by locating elevation blobs in digital surface models. Building extraction is then effected by means of the snakes algorithm and the dynamic programming optimisation technique. With dynamic programming, the building contour optimisation problem is realized through a discrete multistage process and solved by the "timedelayed" algorithm, as developed in this work. The proposed building extraction approach is a semiautomatic process, with usercontrolled operations linking fully automated subprocesses. Inputs into the proposed building extraction system are orthoimages and digital surface models, the latter being generated through image matching techniques. Buildings are modeled as "lumps" or elevation blobs in digital surface models, which are derived by altimetric thresholding of digital surface models. Initial windows for building extraction are provided by projecting the elevation blobs centre points onto an orthoimage. In the next step, approximate building contours are extracted from the orthoimage by region growing constrained by edges. Approximate building contours thus derived are inputs into the dynamic programming optimisation process in which final building contours are established. The proposed system is tested on two study areas: Marconi Beam in Cape Town, South Africa, and Manzese in Dar es Salaam, Tanzania. Sixty percent of buildings in the study areas have been extracted and verified and it is concluded that the proposed approach contributes meaningfully to the extraction of buildings in moderately complex and crowded informal settlement areas. Copyright ISPRS Numéro de notice : A2002-169 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00062-X En ligne : https://doi.org/10.1016/S0924-2716(02)00062-X Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22084
in ISPRS Journal of photogrammetry and remote sensing > vol 56 n° 4 (July - August 2002) . - pp 269 - 282[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-02021 SL Revue Centre de documentation Revues en salle Disponible Near real time photogrammetry on a personal computer / H. Ruther in Photogrammetric record, vol 13 n° 75 (April - September 1990)
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Titre : Near real time photogrammetry on a personal computer Type de document : Article/Communication Auteurs : H. Ruther, Auteur ; N. Parkyn, Auteur Année de publication : 1990 Article en page(s) : pp 415 - 422 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] logiciel
[Termes IGN] PC
[Termes IGN] précision
[Termes IGN] prototype
[Termes IGN] seuillage d'image
[Termes IGN] temps réel
[Termes IGN] traitement parallèleNuméro de notice : A1990-043 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.1990.tb00696.x En ligne : https://doi.org/10.1111/j.1477-9730.1990.tb00696.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25461
in Photogrammetric record > vol 13 n° 75 (April - September 1990) . - pp 415 - 422[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-90011 RAB Revue Centre de documentation En réserve L003 Disponible 106-90012 RAB Revue Centre de documentation En réserve L003 Disponible