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This paper targets interactive object-level editing (e.g., deletion,recoloring, transformation, composition) in dynamic scenes. Recently, somemethods aiming for flexible editing static scenes represented by neuralradiance field (NeRF) have shown impressive synthesis quality, while similarcapabilities in time-variant dynamic scenes remain limited. To solve thisproblem, we propose 4D-Editor, an interactive semantic-driven editingframework, allowing editing multiple objects in a dynamic NeRF with userstrokes on a single frame. We propose an extension to the original dynamic NeRFby incorporating a hybrid semantic feature distillation to maintainspatial-temporal consistency after editing. In addition, we design RecursiveSelection Refinement that significantly boosts object segmentation accuracywithin a dynamic NeRF to aid the editing process. Moreover, we developMulti-view Reprojection Inpainting to fill holes caused by incomplete scenecapture after editing. Extensive experiments and editing examples on real-worlddemonstrate that 4D-Editor achieves photo-realistic editing on dynamic NeRFs.Project page: https://patrickddj.github.io/4D-Editor

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