4D-Editor: Interactive Object-level Editing in Dynamic Neural Radiance Fields via 4D Semantic Segmentation

This paper targets interactive object-level editing(e.g., deletion, recoloring, transformation, composition) in dynamic scenes. Recently, some methods aiming for flexible editing static scenes represented by neural radiance field (NeRF) have shown impressive synthesis quality, while similar capabilities in time-variant dynamic scenes remain limited. To solve this problem, we propose 4D-Editor, an interactive semantic-driven editing framework, allowing editing multiple objects in dynamic NeRF based on user strokes on a single frame. Our dynamic scene representation is built upon hybrid semantic feature fields so that the spatial-temporal consistency can be maintained after editing. In addition, we design recursive selection refinement that significantly boosts segmentation accuracy in a dynamic NeRF to aid the editing process. Moreover, we develop multi-view reprojection inpainting to fill holes caused by incomplete scene capture after editing. Extensive experiments and editing examples on real-world demonstrate that 4D-Editor achieves photo-realistic dynamic NeRF editing. Project page: https://patrickddj.github.io/4D-Editor