A High-contrast Imaging Algorithm: Optimized Image Rotation and Subtraction
作者： Xi Zhang , Jiangpei Dou , Deqing Ren , Deqing Ren , Rui Chen
DOI: 10.1088/0004-637X/802/1/12
关键词:
摘要: Image Rotation and Subtraction (IRS) is a high-contrast imaging technique which can be used to suppress the speckles noise facilitate direct detection of exoplanets. IRS different from Angular Differential Imaging (ADI), in it will subtract copy image with 180 degrees rotated around its PSF center, rather than subtraction median all images. Since planet itself other side PSF, does not suffer self-subtraction. In this paper, we have introduced an optimization algorithm (OIRS), provide extra contrast gain at small angular separations. The performance OIRS has been demonstrated ADI data. We then made comparison signal ratio (S/N) achieved by algorithms locally optimized combination images (LOCI) OIRS. Finally found that deliver better S/N for
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128.84.21.199参考文章(18)
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