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- W4319452016 abstract "Recovering sharper images from blurred observations, referred to as deconvolution, is an ill-posed problem where classical approaches often produce unsatisfactory results. In ground-based astronomy, combining multiple exposures to achieve images with higher signal-to-noise ratios is complicated by the variation of point-spread functions across exposures due to atmospheric effects. We develop an unsupervised multi-frame method for denoising, deblurring, and coadding images inspired by deep generative priors. We use a carefully chosen convolutional neural network architecture that combines information from multiple observations, regularizes the joint likelihood over these observations, and allows us to impose desired constraints, such as non-negativity of pixel values in the sharp, restored image. With an eye towards the Rubin Observatory, we analyze 4K by 4K Hyper Suprime-Cam exposures and obtain preliminary results which yield promising restored images and extracted source lists." @default.
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- W4319452016 date "2023-02-03" @default.
- W4319452016 modified "2023-09-27" @default.
- W4319452016 title "Learning the Night Sky with Deep Generative Priors" @default.
- W4319452016 doi "https://doi.org/10.48550/arxiv.2302.02030" @default.
- W4319452016 hasPublicationYear "2023" @default.
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