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Augmenting grid-based contours to improve thin-plate DEM generation / M.B. Gousie in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 1 (January 2005)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 1 (January 2005) . - pp 69 - 79 Titre : Augmenting grid-based contours to improve thin-plate DEM generation Type de document : Article/Communication Auteurs : M.B. Gousie, Auteur ; W.R. Franklin, Auteur Année de publication : 2005 Article en page(s) : pp 69 - 79 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] artefact [Termes IGN] contour [Termes IGN] fonction spline d'interpolation [Termes IGN] interpolation [Termes IGN] isoligne [Termes IGN] maillage [Termes IGN] modèle numérique de surface Résumé : (Auteur) We present two new pre-processing techniques that improve thin plate Digital Elevation Model (DEM) approximations from grid-based contour data. One method computes gradients from an initial interpolated or approximated surface. The aspects are used to create gradient paths that are interpolated using Catmull-Rom splines. The computed elevations are added to the initial contour data set. Thin plate methods are applied to all of the data. The splines allow information to flow across contours, improving the final surface. The second method successively computes new, intermediate contours in between existing isolines, which provide additional data for subsequent thin plate processing. Both methods alleviate artifacts visible in previous thin plate methods. The surfaces are tested with published methods to show qualitative and quantitative improvements over previous methods. Numéro de notice : A2005-011 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.1.69 En ligne : https://doi.org/10.14358/PERS.71.1.69 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27150 [article]