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Integration of laser-derived DSMs and matched image edges for generating an accurate surface model / K. Mcintosh in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 3 (April - June 2002)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 56 n° 3 (April - June 2002) . - pp 167 - 176 Titre : Integration of laser-derived DSMs and matched image edges for generating an accurate surface model Type de document : Article/Communication Auteurs : K. Mcintosh, Auteur ; Amnon Krupnik, Auteur Année de publication : 2002 Article en page(s) : pp 167 - 176 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] données laser [Termes IGN] image aérienne [Termes IGN] intégration de données [Termes IGN] lasergrammétrie [Termes IGN] modèle numérique de surface [Termes IGN] précision du positionnement [Termes IGN] télémétrie laser aéroporté Résumé : (Auteur) Airborne laser altimetry is a highly efficient and accurate method of obtaining data for the determination of visible surface topography. With minimal processing, the laser data can provide coordinates of points on the visible surface with high spatial frequency and precision. Although this technology has benefits compared to photogrammetric techniques, there are limiting factors due to the laser data having no structural and textural information. These limitations are significant in low-density laser data and may be overcome by utilizing both laser altimetry and photogrammetrically derived data in the surface determination process. The research described in this paper has been undertaken to accurately determine the visible surface in urban areas using airborne laser scanner data and digital aerial images. Edges detected and matched in aerial images are used to refine the digital surface model (DSM) produced from airborne laser scanner data. The laser data and the edge information are merged to exploit the benefits of each dataset, facilitating the generation of an accurate surface model. This model provides a better representation of surface discontinuities, especially building walls. The paper presents the algorithms developed and shows that the surface accuracy is improved by 49% and 15% for the two tested areas, respectively. Copyright ISPRS Numéro de notice : A2002-093 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00042-4 En ligne : https://doi.org/10.1016/S0924-2716(02)00042-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22008 [article]

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