Translator Disclaimer
30 July 2019 Subpixel real-time jitter detection algorithm and implementation for polarimetric and helioseismic imager
Author Affiliations +
Abstract

The polarimetric and helioseismic imager instrument for the Solar Orbiter mission from the European Space Agency requires a high stability while capturing images, specially for the polarimetric ones. For this reason, an image stabilization system has been included in the instrument. It uses global motion estimation techniques to estimate the jitter in real time with subpixel resolution. Due to instrument requirements, the algorithm has to be implemented in a Xilinx Virtex-4QV field programmable gate array. The algorithm includes a 2-D paraboloid interpolation algorithm based on 2-D bisection. We describe the algorithm implementation and the tests that have been made to verify its performance. The jitter estimation has a mean error of 125  pixel of the correlation tracking camera. The paraboloid interpolation algorithm provides also better results in terms of resources and time required for the calculation (at least a 20% improvement in both cases) than those based on direct calculation.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 2329-4124/2019/$28.00 © 2019 SPIE
David Roma, Manuel Carmona, José Bosch, Albert Casas, Atilà Herms, Manel López, Oscar Ruiz, Josep Sabater, Thomas Berkefeld, Thorsten Maue, Eiji Nakai, Wolfgang Schmidt, Dirk Soltau, Reiner Volkmer, and José María Gómez "Subpixel real-time jitter detection algorithm and implementation for polarimetric and helioseismic imager," Journal of Astronomical Telescopes, Instruments, and Systems 5(3), 039003 (30 July 2019). https://doi.org/10.1117/1.JATIS.5.3.039003
Received: 29 January 2019; Accepted: 16 July 2019; Published: 30 July 2019
JOURNAL ARTICLE
17 PAGES


SHARE
Advertisement
Advertisement
Back to Top