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Aircraft based real time bundle adjustment and digital surface model generation

d'Angelo, Pablo and Kurz, Franz (2019) Aircraft based real time bundle adjustment and digital surface model generation. ISPRS Geospatial Week 2019, 10.-14. June 2019, Enschede, Niederlande. DOI: 10.5194/isprs-archives-XLII-2-W13-1643-2019

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Official URL: https://www.gsw2019.org/


This paper introduces a system for real-time generation of digital surface models (DSM) based on an optical multi-camera system flown on board of a manned airplane or helicopter. The system consists of high end consumer cameras, GNSS/IMU system, and on-board computers for real-time data processing. Usually, generation of digital surface models from aerial imagery is done in an off-line process, leading to delayed availability of height data. The proposed system processed data in real time and downlinks the generated DSM on board of the aircraft to a ground station. This paper evaluates the GNSS/IMU on-line solution quality and its impact on the dense stereo matching. The proposed real time sliding window based bundle adjustment significantly improves the DSM quality, allowing generation of detailed digital surface models with a resolution of 2*GSD. Experiments using two flight patterns are conducted over the city of Landsberg and the resulting DSMs are evaluated against a LiDAR generated reference point cloud. The online bundle adjustment is shown to minimize the effect of systematic GNSS/IMU offsets while adding only a limited delay.

Item URL in elib:https://elib.dlr.de/127049/
Document Type:Conference or Workshop Item (Speech)
Title:Aircraft based real time bundle adjustment and digital surface model generation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
d'Angelo, Pablopablo.angelo (at) dlr.dehttps://orcid.org/0000-0001-8541-3856
Kurz, Franzfranz.kurz (at) dlr.dehttps://orcid.org/0000-0003-1718-0004
Refereed publication:No
Open Access:Yes
In ISI Web of Science:No
DOI :10.5194/isprs-archives-XLII-2-W13-1643-2019
Page Range:pp. 1643-1647
Keywords:image orientation, real-time, dense matching, airborne camera, digital elevation model
Event Title:ISPRS Geospatial Week 2019
Event Location:Enschede, Niederlande
Event Type:international Conference
Event Dates:10.-14. June 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - D.MoVe
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Kurz, Dr.-Ing. Franz
Deposited On:03 Apr 2019 11:20
Last Modified:06 Dec 2019 08:54

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