Does it matter which Gaussians you pick in 4D Gaussian streaming?
Anchor-driven 4D Gaussian streaming methods such as Instant Gaussian Stream (IGS) update a dynamic scene each frame from a compact set of Gaussian anchors, chosen by default with Farthest Point Sampling (FPS) at a fixed budget of $8{,}192$. Because these anchors act as control points that drive the whole scene through linear blend skinning, the rule used to choose them ought to affect reconstruction quality. We test this by holding the IGS pipeline fixed and changing only the sampler, comparing FPS, random, uniform, an opacity-scale heuristic, and a learned policy across budgets and refinement settings on N3DV and MeetingRoom. At deployment budgets the sampler has no measurable effect: a ...
| Authors | Ashim Dahal, Rabab Abdelfattah, Nick Rahimi |
|---|---|
| Primary category | cs.CV |
| Published | 18 March 2026 |
| Last updated at source | 22 June 2026 |
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