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J. Imaging 2019, 5(3), 39; https://doi.org/10.3390/jimaging5030039

Image Registration with Particles, Examplified with the Complex Plasma Laboratory PK-4 on Board the International Space Station

Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Münchener Str. 20, 82234 Weßling, Germany
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Received: 28 January 2019 / Revised: 26 February 2019 / Accepted: 6 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Image Processing in Soft Condensed Matter)
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Abstract

Often, in complex plasmas and beyond, images of particles are recorded with a side-by-side camera setup. These images ideally need to be joined to create a large combined image. This is, for instance, the case in the PK-4 Laboratory on board the International Space Station (the next generation of complex plasma laboratories in space). It enables observations of microparticles embedded in an elongated low temperature DC plasma tube. The microparticles acquire charges from the surrounding plasma and interact strongly with each other. A sheet of laser light illuminates the microparticles, and two cameras record the motion of the microparticles inside this laser sheet. The fields of view of these cameras slightly overlap. In this article, we present two methods to combine the associated image pairs into one image, namely the SimpleElastix toolkit based on comparing the mutual information and a method based on detecting the particle positions. We found that the method based on particle positions performs slightly better than that based on the mutual information, and conclude with recommendations for other researchers wanting to solve a related problem. View Full-Text
Keywords: image registration; image fusion; complex plasmas; dusty plasmas; particle tracing image registration; image fusion; complex plasmas; dusty plasmas; particle tracing
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Schwabe, M.; Rubin-Zuzic, M.; Räth, C.; Pustylnik, M. Image Registration with Particles, Examplified with the Complex Plasma Laboratory PK-4 on Board the International Space Station. J. Imaging 2019, 5, 39.

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