A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry
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...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-11-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/8/11/593 |
| _version_ | 1827643557973852160 |
|---|---|
| author | Yunqi Sun Jianfeng Zhou |
| author_facet | Yunqi Sun Jianfeng Zhou |
| author_sort | Yunqi Sun |
| collection | DOAJ |
| description | 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>6</mn></msup></semantics></math></inline-formula> 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. |
| first_indexed | 2024-03-09T17:56:54Z |
| format | Article |
| id | doaj.art-2a57578a8bed43ae9627ca6dd8bed3fe |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T17:56:54Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-2a57578a8bed43ae9627ca6dd8bed3fe2023-11-24T10:16:03ZengMDPI AGUniverse2218-19972022-11-0181159310.3390/universe8110593A Correction Algorithm of the Sampling Effect and Its Application in High-Precision AstrometryYunqi Sun0Jianfeng Zhou1Department of Physics, Tsinghua University, Beijing 100084, ChinaXingfan Information Technology Co., Ningbo 315500, ChinaThe 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>6</mn></msup></semantics></math></inline-formula> 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.https://www.mdpi.com/2218-1997/8/11/593image acquisition modelintegral samplerimage recoveryhigh-precision astrometryintra-pixel quantum efficiency |
| spellingShingle | Yunqi Sun Jianfeng Zhou A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry Universe image acquisition model integral sampler image recovery high-precision astrometry intra-pixel quantum efficiency |
| title | A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry |
| title_full | A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry |
| title_fullStr | A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry |
| title_full_unstemmed | A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry |
| title_short | A Correction Algorithm of the Sampling Effect and Its Application in High-Precision Astrometry |
| title_sort | correction algorithm of the sampling effect and its application in high precision astrometry |
| topic | image acquisition model integral sampler image recovery high-precision astrometry intra-pixel quantum efficiency |
| url | https://www.mdpi.com/2218-1997/8/11/593 |
| work_keys_str_mv | AT yunqisun acorrectionalgorithmofthesamplingeffectanditsapplicationinhighprecisionastrometry AT jianfengzhou acorrectionalgorithmofthesamplingeffectanditsapplicationinhighprecisionastrometry AT yunqisun correctionalgorithmofthesamplingeffectanditsapplicationinhighprecisionastrometry AT jianfengzhou correctionalgorithmofthesamplingeffectanditsapplicationinhighprecisionastrometry |