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arXiv 2311.09652cs.CVcs.GR
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面向混合反射场景的基于事件的运动鲁棒精确形状估计

Event-based Motion-Robust Accurate Shape Estimation for Mixed Reflectance Scenes

Department of Electrical Engineering, Rice University(电气工程系,里士大学);Wyant College of Optical Sciences, University of Arizona(光学科学学院,亚利桑那大学);Department of Electrical and Computer Engineering, Northwestern University(电气与计算机工程系,北western大学);Department of Computer Science, Northwestern University(计算机科学系,北western大学)

Aniket Dashpute, Jiazhang Wang, James Taylor, Oliver Cossairt, Ashok Veeraraghavan, Florian Willomitzer

AI总结:

本研究提出一种基于事件的新型结构光系统,结合对极约束、三角测量与偏折术,实现了混合反射场景的14Hz运动鲁棒高精度三维重建(深度误差<600μm),并支持漫反射场景250Hz超快测量。

摘要:

基于事件的结构光系统近期已成为传统帧式三角测量系统在漫反射表面三维测量领域的热门替代方案。其核心优势包括事件相机带来的快速采集速度和高动态范围,但代价是数据质量较低。截至目前,无论是低精度的基于事件的三维成像系统,还是高精度的帧式三维成像系统,均针对特定表面类型(如漫反射或镜面反射)定制,无法应用于更广泛的物体表面类别(即“混合反射场景”)。\n本研究提出了一种新型基于事件的结构光系统,可实现混合反射场景的高精度快速三维成像。针对采集到的事件,我们采用对极约束,该约束本质上可将测得的反射分解为漫反射、两次反弹镜面反射及其他多次反弹反射。场景中的漫反射表面通过三角测量法重建。随后,已重建的漫反射场景部分被用作“显示屏”,通过偏折术对镜面场景部分进行评估。这一全新流程仅需一台扫描激光器和一台事件相机,即可将整个场景用作虚拟屏幕。\n最终系统实现了混合反射场景的快速且运动鲁棒的重建(帧率14Hz),深度误差小于600μm。此外,我们还推出了一种“超快”采集模式(帧率250Hz),用于漫反射场景的三维测量。

英文摘要:

Event-based structured light systems have recently been introduced as an exciting alternative to conventional frame-based triangulation systems for the 3D measurements of diffuse surfaces. Important benefits include the fast capture speed and the high dynamic range provided by the event camera - albeit at the cost of lower data quality. So far, both low-accuracy event-based and high-accuracy frame-based 3D imaging systems are tailored to a specific surface type, such as diffuse or specular, and can not be used for a broader class of object surfaces ("mixed reflectance scenes"). In this work, we present a novel event-based structured light system that enables fast 3D imaging of mixed reflectance scenes with high accuracy. On the captured events, we use epipolar constraints that intrinsically enable decomposing the measured reflections into diffuse, two-bounce specular, and other multi-bounce reflections. The diffuse surfaces in the scene are reconstructed using triangulation. Then, the reconstructed diffuse scene parts are leveraged as a "display" to evaluate the specular scene parts via deflectometry. This novel procedure allows us to use the entire scene as a virtual screen, using only a scanning laser and an event camera. The resulting system achieves fast and motion-robust (14Hz) reconstructions of mixed reflectance scenes with < 600 $μm$ depth error. Moreover, we introduce an "ultrafast" capture mode (250Hz) for the 3D measurement of diffuse scenes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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