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Integrated UAV-Based Real-Time Mapping for Security Applications

Hein, Daniel and Kraft, Thomas and Brauchle, Jörg and Berger, Ralf (2019) Integrated UAV-Based Real-Time Mapping for Security Applications. ISPRS International Journal of Geo-Information, 8 (5), pp. 1-16. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/ijgi8050219 ISBN ISSN 2220-9964 ISSN 2220-9964

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Official URL: https://www.mdpi.com/2220-9964/8/5/219/htm

Abstract

Security applications such as management of natural disasters and man-made incidents crucially depend on the rapid availability of a situation picture of the affected area. UAV-based remote sensing systems may constitute an essential tool for capturing aerial imagery in such scenarios. While several commercial UAV solutions already provide acquisition of high quality photos or real-time video transmission via radio link, generating instant high-resolution aerial maps is still an open challenge. For this purpose, the article presents a real-time processing tool chain, enabling generation of interactive aerial maps during flight. Key element of this tool chain is the combination of the Terrain Aware Image Clipping (TAC) algorithm and 12-bit JPEG compression. As a result, the data size of a common scenery can be reduced to approximately 0.4% of the original size, while preserving full geometric and radiometric resolution. Particular attention was paid to minimize computational costs to reduce hardware requirements. The full workflow was demonstrated using the DLR Modular Airborne Camera System (MACS) operated on a conventional aircraft. In combination with a commercial radio link, the latency between image acquisition and visualization in the ground station was about 2 s. In addition, the integration of a miniaturized version of the camera system into a small fixed-wing UAV is presented. It is shown that the described workflow is efficient enough to instantly generate image maps even on small UAV hardware. Using a radio link, these maps can be broadcasted to on-site operation centers and are immediately available to the end-users.

Item URL in elib:https://elib.dlr.de/127382/
Document Type:Article
Title:Integrated UAV-Based Real-Time Mapping for Security Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hein, Danieldaniel.hein (at) dlr.dehttps://orcid.org/0000-0001-9186-4178
Kraft, Thomasthomas.kraft (at) dlr.dehttps://orcid.org/0000-0003-3270-5606
Brauchle, JörgJoerg.Brauchle (at) dlr.dehttps://orcid.org/0000-0002-3556-7643
Berger, Ralfralf.berger (at) dlr.dehttps://orcid.org/0000-0002-1314-5554
Date:8 May 2019
Journal or Publication Title:ISPRS International Journal of Geo-Information
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:8
DOI :10.3390/ijgi8050219
Page Range:pp. 1-16
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Innovative Sensing - From Sensors to Methods and Applications
ISSN:2220-9964
ISBN:ISSN 2220-9964
Status:Published
Keywords:UAV camera system; rapid mapping; aerial imaging; real-time situation picture; disaster management; image mosaicing; direct georeferencing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Security Research and Applications
Deposited By: Hein, Daniel
Deposited On:09 May 2019 08:10
Last Modified:21 Sep 2019 05:05

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