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Determining fast orientation changes of multi-spectral line cameras from the primary images

Wohlfeil, Jürgen (2012) Determining fast orientation changes of multi-spectral line cameras from the primary images. ISPRS Journal of Photogrammetry and Remote Sensing, 67, pp. 45-51. Elsevier.

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Fast orientation changes of airborne and spaceborne line cameras cannot always be avoided. In such cases it is essential to measure them with high accuracy to ensure a good quality of the resulting imagery products. Several approaches exist to support the orientation measurement by using optical information received through the main objective/telescope. In this article an approach is proposed that allows the determination of non-systematic orientation changes between every captured line. It does not require any additional camera hardware or onboard processing capabilities but the payload images and a rough estimate of the camera’s trajectory. The approach takes advantage of the typical geometry of multi-spectral line cameras with a set of linear sensor arrays for different spectral bands on the focal plane. First, homologous points are detected within the heavily distorted images of different spectral bands. With their help a connected network of geometrical correspondences can be built up. This network is used to calculate the orientation changes of the camera with the temporal and angular resolution of the camera. The approach was tested with an extensive set of aerial surveys covering a wide range of different conditions and achieved precise and reliable results.

Item URL in elib:https://elib.dlr.de/74513/
Document Type:Article
Title:Determining fast orientation changes of multi-spectral line cameras from the primary images
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wohlfeil, Jürgenjuergen.wohlfeil (at) dlr.deUNSPECIFIED
Journal or Publication Title:ISPRS Journal of Photogrammetry and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 45-51
Keywords:Line camera, exterior orientation, feature matching, optical information, sparse bundle adjustment
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Systeme (old), R - Vorhaben Optische Sensortechnologien (old)
Location: Berlin-Adlershof
Institutes and Institutions:Optical Information Systems
Deposited By: Dombrowski, Ute
Deposited On:30 Jan 2012 06:40
Last Modified:06 Sep 2019 15:28

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