Generation of orthoimages and perspective views with automatic visibility checking and texture blending

dc.contributor.author	Καρράς, Γιώργος	el
dc.contributor.author	Γραμματικόπουλος, Λάζαρος	el
dc.contributor.author	Καλησπεράκης, Ηλίας	el
dc.contributor.author	Πέτσα, Έλλη	el
dc.date.accessioned	2015-01-29T08:55:19Z
dc.date.available	2015-01-29T08:55:19Z
dc.date.issued	2015-01-29
dc.identifier.uri	http://hdl.handle.net/11400/5015
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	Orthorectification software
dc.subject	Surface occlusions
dc.subject	Λογισμικό ορθοαναγωγής
dc.subject	Αποφράξεις επιφάνειας
dc.title	Generation of orthoimages and perspective views with automatic visibility checking and texture blending	en
heal.type	journalArticle
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/sh2006001819
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	2007-04-04
heal.bibliographicCitation	Karras, G., Grammatikopoulos, L., Kalisperakis, I. and Petsa, E. (2007). Generation of orthoimages and perspective views with automatic visibility checking and texture blending. Photogrammetric Engineering and Remote Sensing, 73(4), 04/04/2007 pp. 403-411. Available from: http://portal.survey.ntua.gr/main/labs/photo/staff/gkarras/Karras_PERS_2007.pdf.	en
heal.abstract	Conventional orthorectification software cannot handle surface occlusions and image visibility. The approach presented here synthesizes related work in photogrammetry and computer graphics/vision to automatically produce orthographic and perspective views based on fully 3D surface data (supplied by laser scanning). Surface occlusions in the direction of projection are detected to create the depth map of the new image. This information allows identifying, by visibility checking through back-projection of surface triangles, all source images which are entitled to contribute color to each pixel of the novel image. Weighted texture blending allows regulating the local radiometric contribution of each source image involved, while outlying color values are automatically discarded with a basic statistical test. Experimental results from a close-range project indicate that this fusion of laser scanning with multi-view photogrammetry could indeed combine geometric accuracy with high visual quality and speed. A discussion of intended improvements of the algorithm is also included.	en
heal.journalName	Photogrammetric Engineering and Remote Sensing.	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true