MrNeRF (@janusch_patas)
2025-12-11 | โค๏ธ 52 | ๐ 3
MoRel: Long-Range Flicker-Free 4D Motion Modeling via Anchor Relay-based Bidirectional Blending with Hierarchical Densification
TL;DR: MoRel is a 4D Gaussian Splatting framework that achieves temporally coherent, flicker-free long-range motion scene reconstruction under bounded memory via anchor relay-based bidirectional blending. It further employs feature-variance-guided hierarchical densification to allocate representation capacity where needed, improving reconstruction quality without sacrificing efficiency.
Contributions:
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MoRel introduces the Anchor Relayโbased Bidirectional Blending (ARBB) mechanism. This learns bidirectional deformations between Key-frame Anchors (KfA) and blends them through learnable temporal opacity control, effectively suppressing temporal discontinuities.
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The Feature-variance-guided Hierarchical Densification (FHD) refines anchor representations based on local frequency characteristics, preventing redundant anchor-point generation while preserving high-frequency detail.
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MoRel maintains bounded GPU memory by dividing long sequences into anchor-based chunks with on-demand loading of only the necessary KfA and deformation field.
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The periodic placement of KfA provides natural temporal access points, enabling efficient random temporal access without loading the entire model.
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MoRel requires no external cues during training and uses a simple rendering pipeline, avoiding unnecessary system complexity.
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