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13 December 2020 Super-resolution imaging via aperture modulation
Biao Xu, Zhiqiang Wang, Jinping He
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Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114511U (2020) https://doi.org/10.1117/12.2561416
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
Abstract
High-resolution telescopic imaging is very important in astronomy. Super-resolution technology which breaks the diffraction limit of the imaging system can enhance the spatial resolution with compact setup and low cost. In this work, a novel super-resolution telescopic imaging method based on aperture modulation is proposed, and two different algorithms based on intensity extrapolation and image reconstruction for the recovery of super-resolution image are demonstrated respectively. With the help of aperture modulation, redundant information which contains high frequency components beyond the cut-off frequency of the imaging system is coded into the image sequence, and then they are extracted and used to reconstruct the super-resolution image by subsequent signal processing. Experimental results showed that the resolution was enhanced by 2.1 times for extended targets, and 3 times for point sources. Better performance is possible with the improvement of algorithm.
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Biao Xu, Zhiqiang Wang, and Jinping He "Super-resolution imaging via aperture modulation", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114511U (13 December 2020); https://doi.org/10.1117/12.2561416
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KEYWORDS
Super resolution
Modulation
Reconstruction algorithms
Image restoration
Imaging systems
Resolution enhancement technologies
Detection and tracking algorithms
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