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Keywords = intra-pixel quantum efficiency

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14 pages, 1334 KB  
Article
A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry
by Yunqi Sun and Jianfeng Zhou
Universe 2022, 8(11), 593; https://doi.org/10.3390/universe8110593 - 11 Nov 2022
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Abstract
The sampling effect of the imaging acquisition device is an integration of the input signal within the pixel, resulting in an additional error in the pixel value. Additionally, a sampler with asymmetric intra-pixel quantum efficiency leads to position errors in high-precision astrometry. This [...] Read more.
The sampling effect of the imaging acquisition device is an integration of the input signal within the pixel, resulting in an additional error in the pixel value. Additionally, a sampler with asymmetric intra-pixel quantum efficiency leads to position errors in high-precision astrometry. This paper proposes a model for the integral sampling process. An algorithm that solves the sampling effect, as well as the position error with high accuracy, is also provided. This algorithm provides an accuracy increase of 106 for Gaussian images with a uniform integral sampler. The accuracy limit of the Gaussian image comes from the truncation error. Also, this algorithm provides about 4 times accuracy improvement by eliminating the systematic error caused by the integral sampler with asymmetric intra-pixel quantum efficiency. Full article
(This article belongs to the Section Space Science)
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