Light-Efficient Holographic Illumination for Continuous-Wave Time-of-Flight Imaging

Light-Efficient Holographic Illumination for Continuous-Wave Time-of-Flight Imaging
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用于连续波飞行时间成像的高光效全息照明

DOI:
10.1145/3610548.3618152
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发表时间:
2023
期刊:
ACM
影响因子:
--
通讯作者:
O'Toole, Matthew
O'Toole, Matthew
中科院分区:
--
文献类型:
--
作者:
Chan, Dorian;O'Toole, Matthew

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近年来,飞行时间(TOF)相机在整个商用设备中得到了广泛采用。然而,这些设备从根本上受到其动态范围的限制,难以应对附近较亮物体的饱和度和较远较暗物体的噪声深度。在这项工作中,我们探索克服这些限制的背景下,连续波飞行时间(CWTOF)设备,通过使用全息光源能够重新分配光根据任意图案。特别是,我们建议使用这样的系统来将光从场景的曝光过度区域移动到曝光不足区域,使得整个场景曝光良好。这种方法可以容易地与用于TOF的现有照明方案集成。我们的概念验证原型是由现成的光学元件构建的,并在许多实验室场景中进行了演示。
Time-of-flight (TOF) cameras have seen widespread adoption in recent years across the entire spectrum of commodity devices. However, these devices are fundamentally limited by their dynamic range, struggling with saturation from nearby, brighter objects and noisy depth from farther, darker objects. In this work, we explore overcoming these limitations in the context of continuous-wave time-of-flight (CWTOF) devices, by using a holographic light source capable of redistributing light according to arbitrary patterns. In particular, we propose using such a system to move light from overexposed to underexposed regions of a scene, such that the entire scene is well exposed. Such a methodology can be easily integrated with existing illumination schemes for TOF. Our proof-of-concept prototype is constructed from off-the-shelf optical components, and demonstrated on a number of lab scenes.
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