Burst denoising is now more relevant than ever, as computational photography
helps overcome sensitivity issues inherent in mobile phones and small cameras.
A major challenge in burst-denoising is in coping with pixel misalignment,
which was so far handled with rather simplistic assumptions of simple motion,
or the ability to align in pre-processing. Such assumptions are not realistic
in the presence of large motion and high levels of noise. We show that Neural
Radiance Fields (NeRFs), originally suggested for physics-based novel-view
rendering, can serve as a powerful framework for burst denoising. NeRFs have an
inherent capability of handling noise as they integrate information from
multiple images, but they are limited in doing so, mainly since they build on
pixel-wise operations which are suitable to ideal imaging conditions. Our
approach, termed NAN, leverages inter-view and spatial information in NeRFs to
better deal with noise. It achieves state-of-the-art results in burst denoising
and is especially successful in coping with large movement and occlusions,
under very high levels of noise. With the rapid advances in accelerating NeRFs,
it could provide a powerful platform for denoising in challenging environments.

该研究使用神经辐射场方法处理像素错位和噪声问题来提升拍摄设备的图像质量和降噪能力。