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Automated quality control for orthoimages and DEMs / J.K. Höhle 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 81 - 87 Titre : Automated quality control for orthoimages and DEMs Type de document : Article/Communication Auteurs : J.K. Höhle, Auteur ; Markéta Potůčková, Auteur Année de publication : 2005 Article en page(s) : pp 81 - 87 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] appariement d'images [Termes IGN] contrôle qualité automatique [Termes IGN] corrélation automatique de points homologues [Termes IGN] modèle numérique de surface [Termes IGN] orthoimage [Termes IGN] précision géométrique (imagerie) [Termes IGN] seuillage d'image Résumé : (Auteur) The checking of the geometric accuracy of orthoimages and digital elevation models (DEMs) is discussed. As a reference, an existing orthoimage and a second orthoimage derived from an overlapping aerial image, are used. The proposed automated procedures for checking the orthoimages and DEMs are based on matching of corresponding image patches. Existing topographic databases are additionally used in order to select time-invariant objects as checkpoints. In order to avoid blunders in the correlation, thresholds for similarity measures are applied. Detailed studies show that a combination of thresholds for the maximum correlation coefficient, the average mutual information, and distance can reduce the number of blunders in the automated measurements considerably and should therefore be applied. The calculation of DEM errors is carried out by an improved-formula. The new methods and procedures are applied to two practical examples, and the results are presented. Numéro de notice : A2005-012 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.1.81 En ligne : https://doi.org/10.14358/PERS.71.1.81 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27151 [article]