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arXiv 2209.07071astro-ph.IM
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Noise2Astro:基于自监督NeuralNetworks的天文图像去噪

Noise2Astro: Astronomical Image Denoising With Self-Supervised NeuralNetworks

Yunchong Zhang, Brian Nord, Amanda Pagul, Michael Lepori

摘要:

在观测天文学中,噪声会掩盖感兴趣的信号。大规模天文测量的规模和复杂性越来越大,这将产生更多的数据,增加数据处理的工作量。开发自动化工具,如卷积神经网络(CNN),用于去噪已成为一个有前途的研究领域。我们研究了基于CNN的自监督学习算法的可行性(例如,Noise 2Noise)对天文图像进行去噪。我们在模拟的噪声天文数据上试验了Noise 2Noise。我们根据恢复通量和形态的准确性来评估结果。该算法可以很好地恢复泊松噪声($98.13$ { \raisebox{0.5ex}{\tiny$^{+0.77}_{-0.90} $} $\large\%$ })和高斯噪声(当图像数据具有平滑信号轮廓时($96.45$ { \raisebox{0.5ex}{\tiny$^{+0.80}_{-0.96} $} $\large\%$ })的通量。

英文摘要:

In observational astronomy, noise obscures signals of interest. Large-scale astronomical surveys are growing in size and complexity, which will produce more data and increase the workload of data processing. Developing automated tools, such as convolutional neural networks (CNN), for denoising has become a promising area of research. We investigate the feasibility of CNN-based self-supervised learning algorithms (e.g., Noise2Noise) for denoising astronomical images. We experimented with Noise2Noise on simulated noisy astronomical data. We evaluate the results based on the accuracy of recovering flux and morphology. This algorithm can well recover the flux for Poisson noise ( $98.13${\raisebox{0.5ex}{\tiny$^{+0.77}_{-0.90} $}$\large\%$}) and for Gaussian noise when image data has a smooth signal profile ($96.45${\raisebox{0.5ex}{\tiny$^{+0.80}_{-0.96} $}$\large\%$}).

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