每秒投影两百万条光平面，实现千帧3D扫描
Structured light with a million light planes per second
- 用声光扫描器每秒投200万条光平面
- 达成1000帧/秒的3D扫描速度，超此前系统4倍
- 自适应光照策略突破事件相机理论极限
我们提出一种结构光系统，可实现每秒1000帧的全帧3D扫描，速度是此前最快系统的四倍。核心创新在于使用定制声光光扫描装置，每秒可投射两百万条光平面。该装置与事件相机结合，克服了以往基于事件相机的结构光系统因照明控制速率受限而无法提速的关键瓶颈——照明调控速率不足。与之前系统不同，本系统充分利用事件相机的全帧带宽，将速度瓶颈从照明侧转移至成像侧。为缓解这一新瓶颈并进一步提升扫描速度，我们引入自适应扫描策略，利用事件相机的异步特性，仅对感兴趣区域进行选择性照明，从而实现有效扫描速度较相机理论极限高出一个数量级。
原文摘要 · Abstract (English)
We introduce a structured light system that enables full-frame 3D scanning at speeds of $1000\text{ fps}$, four times faster than the previous fastest systems. Our key innovation is the use of a custom acousto-optic light scanning device capable of projecting two million light planes per second. Coupling this device with an event camera allows our system to overcome the key bottleneck preventing previous structured light systems based on event cameras from achieving higher scanning speeds -- the limited rate of illumination steering. Unlike these previous systems, ours uses the event camera's full-frame bandwidth, shifting the speed bottleneck from the illumination side to the imaging side. To mitigate this new bottleneck and further increase scanning speed, we introduce adaptive scanning strategies that leverage the event camera's asynchronous operation by selectively illuminating regions of interest, thereby achieving effective scanning speeds an order of magnitude beyond the camera's theoretical limit.
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