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Parameterising internal camera geometry with focusing distance / E. Sanz-Ablanedo in Photogrammetric record, vol 27 n° 138 (June - August 2012)  

Public [article]  inPhotogrammetric record > vol 27 n° 138 (June - August 2012) . - pp 210 - 226 Titre : Parameterising internal camera geometry with focusing distance Type de document : Article/Communication Auteurs : E. Sanz-Ablanedo, Auteur ; Jim H. Chandler, Auteur ; R. Wackrow, Auteur Année de publication : 2012 Article en page(s) : pp 210 - 226 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] étalonnage de chambre métrique [Termes IGN] étalonnage géométrique [Termes IGN] longueur focale [Termes IGN] orientation interne [Termes IGN] photogrammétrie terrestre Résumé : (Auteur) A study on the variation of internal camera geometry (principal distance, principal point position and lens distortion parameters) with different focus distances has been conducted. Results demonstrate that variations of parameters are continuous and predictable, allowing a new way to describe internal camera geometry. The classical constant parameters, c, x p , y p , K 1 , K 2 , P 1 and P 2 , are replaced by continuous functions, c(y), x p (y), y p(y), K 1 (y), K 2 (y), P 1 (y) andP 2 (y), where y is a variable describing the focus position. Incorporation of y as a metadata tag (for example, Exif header) of a photograph jointly with a parameterised definition of camera geometry would allow full use of the autofocus camera function; enabling maximum effective depth of field, better match of the plane of focus with the object’s position and higher reliability. Additionally, conducted tests suggest the parameterised definition of internal geometry could help to locate and correct linear dependences between adjusted parameters, potentially improving the precision and accuracy of calibration. Numéro de notice : A2012-307 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00677.x Date de publication en ligne : 20/06/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00677.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31753 [article]

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