The light transport captures a scene's visual complexity. Acquiring light transport for dynamic scenes is difficult, since any change in viewpoint, materials, illumination or geometry also varies the transport. One strategy to capture dynamic light transport is to use a fast “flying-dot” projector; i.e., where an impulse light-probe is quickly scanned across the scene. We have built a novel fast flying-dot projector prototype using a high speed camera and a scanning MEMS (Micro-electro-mechanical system) mirror. Our contributions are calibration strategies that enable dynamic light transport acquisition at near video rates with such a system. We develop new methods for overcoming the effects of MEMS mirror resonance. We utilize new algorithms for denoising impulse scanning at high frame rates and compare the trade-offs in visual quality between frame rate and illumination power. Finally, we show the utility of our calibrated setup by demonstrating graphics applications such as video relighting, direct/global separation, and dual videography for dynamic scenes such as fog, water, and glass. Please see our accompanying video for dynamic scene results.

中文翻译：

---

用于动态光传输采集的快速飞点投影仪的设计与校准

光传输捕捉场景的视觉复杂性。获取动态场景的光传输很困难，因为视点、材料、照明或几何形状的任何变化也会改变传输。捕捉动态光传输的一种策略是使用快速“飞点”投影仪；即，在场景中快速扫描脉冲光探头。我们使用高速相机和扫描 MEMS（微机电系统）反射镜构建了一种新型快速飞点投影仪原型。我们的贡献是校准策略，可以使用此类系统以接近视频速率进行动态光传输采集。我们开发了克服 MEMS 反射镜共振影响的新方法。我们利用新算法在高帧率下对脉冲扫描进行去噪，并比较帧率和照明功率之间视觉质量的权衡。最后，我们通过演示图形应用程序（例如视频重新照明、直接/全局分离以及针对雾、水和玻璃等动态场景的双摄像）来展示我们校准设置的实用性。请参阅我们随附的视频了解动态场景结果。