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arXiv 2302.05804astro-ph.IM
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用于快速、可扩展且高保真多帧天文图像反卷积的灵活期望最大化框架

A flexible Expectation-Maximization framework for fast, scalable and high-fidelity multi-frame astronomical image deconvolution

Yashil Sukurdeep, Fausto Navarro, Tamas Budavari

AI总结:

提出一种计算高效的灵活 EM 框架,结合 Tensorflow 与 GPU 加速实现多帧天文图像反卷积和超分辨率,并在 HSC 数据上获得高保真重建。

摘要:

我们提出了一种计算高效的期望最大化框架,用于多帧图像反卷积和超分辨率。我们的方法非常适合处理来自现代天文巡天的大规模成像数据。我们的 Tensorflow 实现具有灵活性,受益于先进的算法解决方案,并允许用户无缝利用图形处理器(GPU)加速,从而使其能够用于现代天文软件流水线。我们方法的测试平台是一组 4K×4K 的 Hyper Suprime-Cam 曝光图像,这些图像在质量上最接近即将建成的 Rubin 天文台的成像数据。初步结果极具前景:我们的方法生成了夜空的高保真非参数重建,从中我们恢复出前所未有的细节,例如星系旋臂的形状,同时还成功将恒星完美反卷积为本质上的单个像素。

英文摘要:

We present a computationally efficient expectation-maximization framework for multi-frame image deconvolution and super-resolution. Our method is well adapted for processing large scale imaging data from modern astronomical surveys. Our Tensorflow implementation is flexible, benefits from advanced algorithmic solutions, and allows users to seamlessly leverage Graphical Processing Unit (GPU) acceleration, thus making it viable for use in modern astronomical software pipelines. The testbed for our method is a set of $4$K by $4$K Hyper Suprime-Cam exposures, which are closest in terms of quality to imaging data from the upcoming Rubin Observatory. The preliminary results are extremely promising: our method produces a high-fidelity non-parametric reconstruction of the night sky, from which we recover unprecedented details such as the shape of the spiral arms of galaxies, while also managing to deconvolve stars perfectly into essentially single pixels.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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