The flat-field method based on rotated images for FY-3E/X-EUVI
文献类型：期刊论文
| 作者 | G. X. Ding; K. Wu; L. P. He; B. Chen and F. Liu |
| 刊名 | Frontiers in Physics
 |
| 出版日期 | 2022 |
| 卷号 | 10页码:7 |
| ISSN号 | 2296-424X |
| DOI | 10.3389/fphy.2022.1048835 |
| 英文摘要 | An algorithm to calculate the flat-field coefficient based on the series of rotated images captured by the solar X-ray and Extreme Ultraviolet Imager (X-EUVI) onboard the Fengyun-3E satellite is proposed in this article. The method includes determination of the solar disk centers and radiuses, calculation of the rotation angles, coordinate transformation to expand the solar disk into rectangles, and derivation of the flat matrix using the KLL algorithm. The accuracy of determination of the solar disk center and radius tested by the Hough gradient method and the least-squares method is at sub-pixel, and the precision of the calculated rotation angle based on the log-polar transform is less than 0.025 & DEG;. Since the X-EUVI rotates relative to the Sun in real time, multiple rotating images can be obtained and used for flat-field calibration at any time, and the tested accuracy is estimated at 0.79-3.42%. This flat-field method will provide reference and support for solar image processing and research. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/66675]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | G. X. Ding,K. Wu,L. P. He,et al. The flat-field method based on rotated images for FY-3E/X-EUVI[J]. Frontiers in Physics,2022,10:7. |
| APA | G. X. Ding,K. Wu,L. P. He,&B. Chen and F. Liu.(2022).The flat-field method based on rotated images for FY-3E/X-EUVI.Frontiers in Physics,10,7. |
| MLA | G. X. Ding,et al."The flat-field method based on rotated images for FY-3E/X-EUVI".Frontiers in Physics 10(2022):7. |
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