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A radiometric aerial triangulation for the equalization of digital aerial Images and orthoimages / Laure Chandelier in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 2 (February 2009)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 2 (February 2009) . - pp 193 - 200 Titre : A radiometric aerial triangulation for the equalization of digital aerial Images and orthoimages Type de document : Article/Communication Auteurs : Laure Chandelier , Auteur ; Gilles Martinoty , Auteur Année de publication : 2009 Article en page(s) : pp 193 - 200 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] image aérienne [Termes IGN] méthode des moindres carrés [Termes IGN] modélisation radiométrique de prise de vue [Termes IGN] orthoimage [Termes IGN] point d'appui [Termes IGN] points homologues [Termes IGN] qualité radiométrique (image) [Termes IGN] uniformisation d'histogramme Résumé : (Auteur) Atmospheric haze variations, temporal differences, atmosphere’s or ground surfaces’ and Bidirectional Reflectance Distribution Function (BRDF), are well-known sources of radiometric heterogeneities in aerial images. It is necessary to correct them for many applications, such as the generation of large seamless mosaics of orthoimages, or land-cover classifications. This contribution describes a method for equalizing digital aerial images based on a parametric, semi-empirical radiometric model. The model’s parameters are computed through a global least-squares minimization process, using radiometric tie-points in overlapping areas between images. The method may be called a “radiometric aerial triangulation” since its principle is quite similar to a standard aerial triangulation. It leads to a relative equalization between images, keeping their original contrast and color information. The method has been successfully applied operationally to more than forty projects comprising three to four thousands digital images each, for the creation of orthoimages over France. The results are good as long as atmospheric conditions are favorable and stable. Copyright ASPRS Numéro de notice : A2009-013 Affiliation des auteurs : IGN (1940-2011) Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.2.193 En ligne : https://doi.org/10.14358/PERS.75.2.193 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29643 [article]