Representation of rolling shutter within EWA splatting

Determine how to represent time-dependent rolling shutter camera effects within the EWA splatting formulation used to project 3D Gaussian particles onto the image plane in 3D Gaussian Splatting, so that the rasterization approach can accommodate rolling shutter.

Background

3D Gaussian Splatting relies on EWA splatting, which approximates non-linear camera projections via Jacobian-based linearization. This leads to approximation errors under distortion and requires a single projection function.

Rolling shutter introduces time-dependent camera motion during exposure, making the projection function vary across scanlines. The authors explicitly note that within the EWA splatting framework it is unclear how to represent such time-dependent effects; their proposed Unscented Transform formulation sidesteps this by projecting sigma points with varying extrinsics.

References

Moreover, it is unclear how to even represent time-dependent effect such as rolling-shutter within the EWA splatting formulation.

— 3DGUT: Enabling Distorted Cameras and Secondary Rays in Gaussian Splatting  (2412.12507 - Wu et al., 2024) in Section 1 (Introduction)

GeoWeaver incurs additional matching and adaptation cost over feed-forward inference, and currently assumes static scenes and fixed per-camera focal calibration. Extending it to dynamic scenes, rolling shutter, zoom, and real-time operation remains future work.

— GeoWeaver: Accurate Long-Sequence 3D Reconstruction via Hierarchical Geometric Assembly  (2608.17389 - Jiang et al., 18 Aug 2026) in Section 6, Conclusions and Limitations