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Improved super-resolution for images by using flows

Improved super-resolution for images by using flows


Normalizing Flow as a Flexible Fidelity Objective for Photo-Realistic Super-resolution

arXiv paper abstract https://arxiv.org/abs/2111.03649



Super-resolution is an ill-posed problem, where a ground-truth high-resolution image represents only one possibility in the space of plausible solutions.


... dominant paradigm is to employ pixel-wise losses, such as L_1, which drive the prediction towards a blurry average.


... address this issue by revisiting the L_1 loss and show that it corresponds to a one-layer conditional flow.


... explore general flows as a fidelity-based alternative to the L_1 objective.


... demonstrate that the flexibility of deeper flows leads to better visual quality and consistency when combined with adversarial losses.


... approach is shown to outperform state-of-the-art methods for photo-realistic super-resolution. ...



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