Modeling distortion of super-wideangle lenses for architectural and archaeological applications

dc.contributor.author	Καρράς, Γιώργος	el
dc.contributor.author	Μουντράκης, Γεώργιος	el
dc.contributor.author	Πατιάς, Πέτρος	el
dc.contributor.author	Πέτσα, Έλλη	el
dc.date.accessioned	2015-01-28T21:03:27Z
dc.date.available	2015-01-28T21:03:27Z
dc.date.issued	2015-01-28
dc.identifier.uri	http://hdl.handle.net/11400/4983
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.subject	Lens Distortion
dc.subject	Super-Wide-Angle Lenses
dc.subject	Photogrammetry in architecture
dc.subject	Resampling
dc.subject	Φακός παραμόρφωσης
dc.subject	Ευρυγώνιος φακός
dc.subject	Φωτογραμμετρία στην αρχιτεκτονική
dc.title	Modeling distortion of super-wideangle lenses for architectural and archaeological applications	en
heal.type	conferenceItem
heal.classification	Technology
heal.classification	Photogrammetry
heal.classification	Τεχνολογία
heal.classification	Φωτογραμμετρία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://skos.um.es/unescothes/C02980
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Φωτογραμμετρία
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh86003407
heal.keywordURI	http://zbw.eu/stw/descriptor/19568-0
heal.language	en
heal.access	free
heal.recordProvider	Τ.Ε.Ι. Αθήνας, Σχολή Τεχνολογικών Εφαρμογών, Τμήμα Μηχανικών Πληροφορικής και Μηχανικών Τοπογραφίας & Γεωπληροφορικής	el
heal.publicationDate	1998
heal.bibliographicCitation	Karras G., Mountrakis G., Patias P. and Petsa E. (1998). Modeling distortion of super-wideangle lenses for architectural and archaeological applications. International Archives of Photogrammetry & Remote Sensing, 32(5), pp. 570-573. Available from: http://portal.survey.ntua.gr/main/labs/photo/staff/gkarras/Karras_isprs_Com5_1998.pdf	en
heal.abstract	Mapping of architectural and archaeological objects often encounters limitations in imaging distances (interiors, narrow streets, excavations), usually tackled via large numbers of images or special camera platforms This, however, seriously contradicts the benefits of simple, low-cost photogrammetric procedures. In these cases, furthermore, the use of digital cameras with the currently limited area of sensitive sensors may also be impracticable. In this context, the employment of super-wide-angle lenses (e. g. of 14, 17 or 18 mm focal lengths for 35 mm cameras) appears as a possible remedy; these, however, suffer from heavy distortions. This paper presents a first study of two different 17 mm lenses commonly available in the market (RMC Tokina and SP Tamron on Nikon cameras). In order to assess their photogrammetric po-tential, the efficiency of the conventional model for radial symmetric lens distortion has been tested. Partial calibration was performed using photography of straight lines easily found in urban environments. Overall precisions of line fitting, initially 4.2 and 6.3 pixels, rose after correcting distortion to 1.3 and 1.5 pixels, respectively; thus, the main cause of de-viations seems to have been removed. Repeatability of calibration, on the other hand, is also regarded as satisfactory (presence of decentering distortion was difficult to establish). Digital image transformation, also performed here, results in resampled imagery essentially freed from lens distortion and suitable for common digital photogrammetric software.	en
heal.fullTextAvailability	true
heal.conferenceName	International Archives of Photogrammetry & Remote Sensing.	en
heal.conferenceItemType	full paper