# After feedforward reconstruction becomes 1,200 times faster, is BA still necessary in dynamic 4D reconstruction?

- Source: 3D视觉工坊 · 微信公众号
- Published: 2026-10-23T16:00:00.000Z
- RoboHot: https://robohot.news/en/items/sqrc5o4ugjnt12kn7qrup7mxh
- Original: https://mp.weixin.qq.com/s?__biz=MzU1MjY4MTA1MQ==&mid=2247752486&idx=1&sn=992b2d907f291cdbcee11950f9016e0f&chksm=fa33af3481438d1fb5aa52f63bc610071ff09826407d974a977f7b72522221d27ebbbff4338b&scene=126&sessionid=1792856417#rd

## Summary

StreamSplat at ICLR 2026 achieves purely feedforward, online generation of dynamic 3DGS directly from uncalibrated video streams, at 1,200 times the speed of optimization-based methods. But MoRe at CVPR 2026 actively embeds a BA-like refinement module in its purely feedforward pipeline; removing it raises Sintel ATE from 0.147 to 0.155. BA-Track, an ICCV 2025 Oral, uses a 3D point tracker to decompose camera and object motion, adapting classic BA to dynamic scenes.