  We present ZeroRF, a novel per-scene optimization method addressing the
challenge of sparse view 360{\deg} reconstruction in neural field
representations. Current breakthroughs like Neural Radiance Fields (NeRF) have
demonstrated high-fidelity image synthesis but struggle with sparse input
views. Existing methods, such as Generalizable NeRFs and per-scene optimization
approaches, face limitations in data dependency, computational cost, and
generalization across diverse scenarios. To overcome these challenges, we
propose ZeroRF, whose key idea is to integrate a tailored Deep Image Prior into
a factorized NeRF representation. Unlike traditional methods, ZeroRF
parametrizes feature grids with a neural network generator, enabling efficient
sparse view 360{\deg} reconstruction without any pretraining or additional
regularization. Extensive experiments showcase ZeroRF's versatility and
superiority in terms of both quality and speed, achieving state-of-the-art
results on benchmark datasets. ZeroRF's significance extends to applications in
3D content generation and editing. Project page:
https://sarahweiii.github.io/zerorf/
