| A HIGH-CONTRAST IMAGING ALGORITHM: OPTIMIZED IMAGE ROTATION AND SUBTRACTION | |
Jiangpei Dou1,2 ; Deqing Ren1,2,3; Gang Zhao1,2; Xi Zhang1,2; Rui Chen1,2; Yongtian Zhu1,2
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| 2015-03 | |
| 发表期刊 | The Astrophysical Journal
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| 卷号 | 802期号:12页码:1-6 |
| 摘要 |
Image Rotation and Subtraction (IRS) is a high-contrast imaging technique that can be used to suppress the speckle noise and facilitate the direct detection of exoplanets. IRS is different from Angular Differential Imaging (ADI), in that it will subtract a copy of the image with 180° rotated around its point-spread function (PSF) center, rather than the subtraction of the median of all of the PSF images. Since the planet itself will be rotated to the other side of the
PSF, IRS does not suffer from planet self-subtraction. In this paper, we have introduced an optimization algorithm to IRS (OIRS), that can provide an extra contrast gain at small angular separations. The performance of OIRS has been demonstrated with ADI data. We then made a comparison of the signal-to-noise ratio (S/N) achieved by algorithms of locally optimized combinations of images and OIRS. Finally, we found that the OIRS algorithm can deliver a better S/N for small angular separations. |
| 关键词 | Adaptive Optics Planetary Systems Imaging Image Processing |
| 学科领域 | 天文技术与方法 |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.niaot.ac.cn/handle/114a32/1174 |
| 专题 | 期刊论文 |
| 作者单位 | 1.Nanjing Institute of Astronomical Optics & Technology 2.Key Laboratory of Astronomical Optics & Technology,Chinese Academy of Sciences 3.Physics & Astronomy Department, California State University Northridge |
| 推荐引用方式 GB/T 7714 | Jiangpei Dou,Deqing Ren,Gang Zhao,et al. A HIGH-CONTRAST IMAGING ALGORITHM: OPTIMIZED IMAGE ROTATION AND SUBTRACTION[J]. The Astrophysical Journal,2015,802(12):1-6. |
| APA | Jiangpei Dou,Deqing Ren,Gang Zhao,Xi Zhang,Rui Chen,&Yongtian Zhu.(2015).A HIGH-CONTRAST IMAGING ALGORITHM: OPTIMIZED IMAGE ROTATION AND SUBTRACTION.The Astrophysical Journal,802(12),1-6. |
| MLA | Jiangpei Dou,et al."A HIGH-CONTRAST IMAGING ALGORITHM: OPTIMIZED IMAGE ROTATION AND SUBTRACTION".The Astrophysical Journal 802.12(2015):1-6. |
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| A HIGH-CONTRAST IMAG（1238KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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