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Camera calibration using composed cubic splines / A. Arfaoui in Geomatica, vol 65 n° 2 (June 2011)  

Public [article]  inGeomatica > vol 65 n° 2 (June 2011) . - pp 189 - 197 Titre : Camera calibration using composed cubic splines Type de document : Article/Communication Auteurs : A. Arfaoui, Auteur ; F. Plante, Auteur Année de publication : 2011 Article en page(s) : pp 189 - 197 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] correction d'image [Termes IGN] distorsion d'image [Termes IGN] étalonnage d'instrument [Termes IGN] fonction spline [Termes IGN] grille d'échantillonnage [Termes IGN] orientation du capteur [Termes IGN] spline cubique Résumé : (Auteur) Camera calibration is a process whereby the geometric characteristics of a specific camera are determined. It is performed so that the photograph obtained can be used to produce accurate measurements. This paper presents a simple and accurate model for extracting the optical characteristics (intrinsic parameters) as well as the 3D position and orientation of the camera (extrinsic parameters) based on image coordinate measurements for targets of known 3-D position. The proposed algorithm is divided into two major steps. First, the behaviour of a grid of projected lines is studied and the required local corrections are applied. Such corrections are calculated using Composed Cubic Splines. This function covers radial, decentering and prism distortions. It provides a more realistic model of distortion which is represented as a composed surface. Then, calibration parameters are estimated using a pinhole model based on the minimization of a linear criterion relating the 3D coordinates of the targets with their 2D image projections. Numéro de notice : A2011-543 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.5623/cig2011-028 En ligne : https://doi.org/10.5623/cig2011-028 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31437 [article]

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