Orientation of oblique airborne image sets - Experiences from the ISPRS/Eurosdr benchmark on multi-platform photogrammetry

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dc.identifier.uri http://dx.doi.org/10.15488/702
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/726
dc.contributor.author Gerke, M.
dc.contributor.author Nex, F.
dc.contributor.author Remondino, F.
dc.contributor.author Jacobsen, Karsten
dc.contributor.author Kremer, J.
dc.contributor.author Karel, W.
dc.contributor.author Huf, H.
dc.contributor.author Ostrowski, W.
dc.date.accessioned 2016-11-21T08:37:58Z
dc.date.available 2016-11-21T08:37:58Z
dc.date.issued 2016
dc.identifier.citation Gerke, M.; Nex, F.; Remondino, F.; Jacobsen, K.; Kremer, J. et al.: Orientation of oblique airborne image sets - Experiences from the ISPRS/Eurosdr benchmark on multi-platform photogrammetry. In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives 41 (2016), S. 185-191. DOI: http://dx.doi.org/10.5194/isprsarchives-XLI-B1-185-2016
dc.description.abstract During the last decade the use of airborne multi camera systems increased significantly. The development in digital camera technology allows mounting several mid- or small-format cameras efficiently onto one platform and thus enables image capture under different angles. Those oblique images turn out to be interesting for a number of applications since lateral parts of elevated objects, like buildings or trees, are visible. However, occlusion or illumination differences might challenge image processing. From an image orientation point of view those multi-camera systems bring the advantage of a better ray intersection geometry compared to nadir-only image blocks. On the other hand, varying scale, occlusion and atmospheric influences which are difficult to model impose problems to the image matching and bundle adjustment tasks. In order to understand current limitations of image orientation approaches and the influence of different parameters such as image overlap or GCP distribution, a commonly available dataset was released. The originally captured data comprises of a state-of-the-art image block with very high overlap, but in the first stage of the so-called ISPRS/EUROSDR benchmark on multi-platform photogrammetry only a reduced set of images was released. In this paper some first results obtained with this dataset are presented. They refer to different aspects like tie point matching across the viewing directions, influence of the oblique images onto the bundle adjustment, the role of image overlap and GCP distribution. As far as the tie point matching is concerned we observed that matching of overlapping images pointing to the same cardinal direction, or between nadir and oblique views in general is quite successful. Due to the quite different perspective between images of different viewing directions the standard tie point matching, for instance based on interest points does not work well. How to address occlusion and ambiguities due to different views onto objects is clearly a non-solved research problem so far. In our experiments we also confirm that the obtainable height accuracy is better when all images are used in bundle block adjustment. This was also shown in other research before and is confirmed here. Not surprisingly, the large overlap of 80/80% provides much better object space accuracy – random errors seem to be about 2-3fold smaller compared to the 60/60% overlap. A comparison of different software approaches shows that newly emerged commercial packages, initially intended to work with small frame image blocks, do perform very well. eng
dc.language.iso eng
dc.publisher Göttingen : Copernicus GmbH
dc.relation.ispartof 23rd International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Congress, ISPRS 2016, 12–19 July 2016, Prague, Czech Republic
dc.relation.ispartofseries International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives 41 (2016)
dc.rights CC BY 3.0
dc.rights.uri http://creativecommons.org/licenses/by/3.0/
dc.subject Bundle adjustment eng
dc.subject Oblique eng
dc.subject Orientation eng
dc.subject Tie point matching eng
dc.subject Crystal orientation eng
dc.subject Image processing eng
dc.subject Photogrammetry eng
dc.subject Random errors eng
dc.subject Remote sensing eng
dc.subject Bundle adjustments eng
dc.subject Bundle block adjustments eng
dc.subject Commercial packages eng
dc.subject Current limitation eng
dc.subject Multicamera systems eng
dc.subject Oblique eng
dc.subject Overlapping images eng
dc.subject Tie points eng
dc.subject Image matching eng
dc.subject.ddc 500 | Naturwissenschaften ger
dc.subject.ddc 520 | Astronomie, Kartographie ger
dc.title Orientation of oblique airborne image sets - Experiences from the ISPRS/Eurosdr benchmark on multi-platform photogrammetry
dc.type article
dc.type conferenceObject
dc.type Text
dc.relation.issn 1682-1750
dc.relation.doi http://dx.doi.org/10.5194/isprsarchives-XLI-B1-185-2016
dc.bibliographicCitation.volume 41
dc.bibliographicCitation.firstPage 185
dc.bibliographicCitation.lastPage 191
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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