Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4991
Title: An open-source educational software for basic photogrammetric tasks
Authors: Καλησπεράκης, Ηλίας
Γραμματικόπουλος, Λάζαρος
Πέτσα, Έλλη
Καρράς, Γιώργος
Item type: Conference publication
Conference Item Type: Full Paper
Keywords: Matlab;Monoscopic measurements;Camera calibration;Κάμερας βαθμονόμησης
Subjects: Technology
Photogrammetry
Τεχνολογία
Φωτογραμμετρία
Issue Date: 28-Jan-2015
9-Nov-2006
Date of availability: 28-Jan-2015
Abstract: The current implementation of an educational package for basic photogrammetric operations is out- lined. The context of this open-source software (MPT), developed in Matlab, is primarily the intro-ductory course of Photogrammetry. Thus, the scope here is not to show students ‘how to do it’ but rather to clarify ‘what is actually being done’ in every step. In this sense, the stress lies mainly on basic photogrammetric adjustments. Students can work with one or two images at a time and per-form monoscopic measurements of image points, lines or polylines. Exterior orientation is handled in a variety of ways: space resection with or without camera calibration (with or without estimation of radial lens distortion); linear and non-linear DLT approach (again with or without lens distortion); relative orientation and absolute orientation. Detailed results are presented, including standard error of the adjustment, residuals, covariance matrix of estimated parameters, correlations. Individual ob-servations may be optionally excluded to study their effect on the adjustment. For fully oriented ste-reo pairs, 3D reconstruction is then possible. The 3D plot may be observed in the program’s 3Dviewer and exported in DXF format. Besides, 2D projective transformation is also possible, allowing rectification of vector data or resampling of digital images. Other features (e.g. image enhancement tools or self-calibrating bundle adjustment) are already implemented and will soon be incorporated.
Language: English
Citation: Kalisperakis, I., Grammatikopoulos, L., Petsa, E. and Karras, G. (2006). An open-source educational software for basic photogrammetric tasks. Proceedings of the FIGISPRS-ICA International Symposium on “Modern Technologies, Education & Professional Practice in Geodesy & Related Fields”, Sofia, 09-10/11/2006 , pp. 581-586. Available from: http://portal.survey.ntua.gr/main/labs/photo/staff/gkarras/Karras_Sofia_06.pdf
Conference: FIGISPRS-ICA International Symposium on Modern Technologies, Education & Professional Practice in Geodesy & Related Fields
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/4991
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