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Experiments with Metadata-derived Initial Values and Linesearch Bundle Adjustment in Architectural Photogrammetry
Umeå University, Faculty of Science and Technology, Department of Computing Science.ORCID iD: 0000-0002-7657-6917
INSA Strasbourg, France. (ICube Laboratory UMR 7357, Photogrammetry and Geomatics Group)
2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

According to the Waldhäusl and Ogleby (1994) "3x3 rules", a well-designed close-range architetural photogrammetric project should include a sketch of the project site with the approximate position and viewing direction of each image. This orientation metadata is important to determine which part of the object each image covers. In principle, the metadata could be used as initial values for the camera external orientation (EO) parameters. However, this has rarely been used, partly due to convergence problem for the bundle adjustment procedure.

In this paper we present a photogrammetric reconstruction pipeline based on classical methods and investigate if and how the linesearch bundle algorithms of Börlin et al. (2004) and/or metadata can be used to aid the reconstruction process in architectural photogrammetry when the classical methods fail. The primary initial values for the bundle are calculated by the five-point algorithm by Nistér (Stewénius et al., 2006). Should the bundle fail, initial values derived from metadata are calculated and used for a second bundle attempt.

The pipeline was evaluated on an image set of the INSA building in Strasbourg. The data set includes mixed convex and non-convex subnetworks and a combination of manual and automatic measurements.

The results show that, in general, the classical bundle algorithm with five-point initial values worked well. However, in cases where it did fail, linesearch bundle and/or metadata initial values did help. The presented approach is interesting for solving EO problems when the automatic orientation processes fail as well as to simplify keeping a link between the metadata containing the plan of how the project should have become and the actual reconstructed network as it turned out to be.

Place, publisher, year, edition, pages
Copernicus Publications , 2013. Vol. II-5/W1, 43-48 p.
Series
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 2194-9050 ; Volume II-5/W1
Keyword [en]
Bundle adjustment, Convergence, Initial values, Metadata, Architectural photogrammetry
National Category
Computer Vision and Robotics (Autonomous Systems) Computational Mathematics
Research subject
Computer and Information Science
Identifiers
URN: urn:nbn:se:umu:diva-79845DOI: 10.5194/isprsannals-II-5-W1-43-2013OAI: oai:DiVA.org:umu-79845DiVA: diva2:645219
Conference
XXIV International CIPA Symposium, Strasbourg, 2-6 September, 2013
Available from: 2013-09-03 Created: 2013-09-03 Last updated: 2014-06-11Bibliographically approved

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