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Diffraction model of a plenoptic camera for in-situ space exploration

Krutz, Ulrike und Lingenauber, Martin und Strobl, Klaus H. und Fröhlich, Florian und Buder, Maximilian (2018) Diffraction model of a plenoptic camera for in-situ space exploration. In: Diffraction model of a plenoptic camera for in-situ space exploration, 10677. Proc. SPIE. SPIE Photonics Europe, 22.-26. April 2018, Straßburg, Frankreich. doi: 10.1117/12.2306743.

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Offizielle URL: http://dx.doi.org/10.1117/12.2306743

Kurzfassung

This paper provides a detailed system theoretical model of a plenoptic camera with the aim to provide in-depth understanding of the plenoptic data recording concept and its effects. Plenoptic cameras, also known as light field cameras, were firstly thought of in the beginning of the 20th century and became recently possible thanks to rapid development of processing hardware and the increase of camera sensor resolution. Despite being a new type of sensor, they are operated in the same way as conventional cameras, but offer several advantages. A plenoptic camera consists of a main lens and a lenslet array (microlens array) right in front of the detector. The microlens array causes not only the recording of the incident location of a light ray on the sensor, as it is done by a conventional camera, but also the incident direction. Such a record can be represented by a 4-D data set known as the light field. In fact, by inserting a microlens array any conventional camera can be transformed into a plenoptic camera. The plenoptic recording concept and the 4-D light field provide multiple advantages over conventional cameras. For example, a single recorded light field allows first, to reconstruct novel views with small changes in viewpoint, second, to create a depth map, and third, to refocus images after the data capture. Hence, the process of focusing is shifted from hardware to software. Last, but not least, plenoptic cameras allow an extended depth of field in comparison to a conventional camera and the use of a bigger camera aperture. Most of the mentioned advantages become particularly effective at close-range to an object. The German Aerospace Center performs research on plenoptic cameras for close-range imaging in space. Possible applications are for example robot vision with plenoptic cameras for robotic arm operations during on-orbit servicing missions or the use of plenoptic cameras on rovers in the course of exploration missions to other planets. Those application scenarios and the demanding conditions in space require thorough comprehension of plenoptic cameras. For this purpose, this paper shall provide a detailed model of plenoptic cameras, which allows to derive camera parameters and optimize them with particular attention to the user requirements and to generate synthetic data. The latter can be utilized to assess the evaluation algorithms, which are not mentioned in detail in this paper. The modeling of the plenoptic camera is mainly based on the theory of geometric optics expanded by elements of diffraction optics.

elib-URL des Eintrags:https://elib.dlr.de/120145/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Diffraction model of a plenoptic camera for in-situ space exploration
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Krutz, Ulrikeulrike.krutz (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Lingenauber, MartinMartin.Lingenauber (at) dlr.dehttps://orcid.org/0000-0002-9610-727XNICHT SPEZIFIZIERT
Strobl, Klaus H.klaus.strobl (at) dlr.dehttps://orcid.org/0000-0001-8123-0606NICHT SPEZIFIZIERT
Fröhlich, FlorianFlorian.Froehlich (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Buder, Maximilianmaximilian.buder (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:24 Mai 2018
Erschienen in:Diffraction model of a plenoptic camera for in-situ space exploration
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:10677
DOI:10.1117/12.2306743
Verlag:Proc. SPIE
Name der Reihe:Unconventional Optical Imaging
Status:veröffentlicht
Stichwörter:plenoptic imaging, diffraction, microlens array, PSF
Veranstaltungstitel:SPIE Photonics Europe
Veranstaltungsort:Straßburg, Frankreich
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:22.-26. April 2018
Veranstalter :SPIE
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Technik für Raumfahrtsysteme
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R SY - Technik für Raumfahrtsysteme
DLR - Teilgebiet (Projekt, Vorhaben):R - LIPA - Lichtfeldkameras für In-situ Planetologie und Astrobiologie [SY]
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Optische Sensorsysteme > Echtzeit-Datenprozessierung
Institut für Robotik und Mechatronik (ab 2013) > Perzeption und Kognition
Hinterlegt von: Krutz, Ulrike
Hinterlegt am:29 Mai 2018 10:37
Letzte Änderung:29 Mär 2023 00:37

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