As 3D Gaussian Splatting (3DGS) provides fast and high-quality novel view
synthesis, it is a natural extension to deform a canonical 3DGS to multiple
frames. However, previous works fail to accurately reconstruct dynamic scenes,
especially 1) static parts moving along nearby dynamic parts, and 2) some
dynamic areas are blurry. We attribute the failure to the wrong design of the
deformation field, which is built as a coordinate-based function. This approach
is problematic because 3DGS is a mixture of multiple fields centered at the
Gaussians, not just a single coordinate-based framework. To resolve this
problem, we define the deformation as a function of per-Gaussian embeddings and
temporal embeddings. Moreover, we decompose deformations as coarse and fine
deformations to model slow and fast movements, respectively. Also, we introduce
an efficient training strategy for faster convergence and higher quality.
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3D 高斯点精细喷洒（3DGS）将用于快速高质量的新视角合成，可自然延伸至多帧变形。通过将变形定义为基于每个高斯点嵌入和时间嵌入的函数，并将变形分解为粗变形和细变形以模拟缓慢和快速运动，作者解决了通过协调基于坐标的框架的错误设计所导致的准确重建动态场景的问题，并提出了一种高效训练策略以实现更快收敛和更高质量。