Single photon flux imaging with sub-pixel resolution by motion compensation
Single photon flux imaging with sub-pixel resolution by motion compensation
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DOI：
10.1117/12.2663029
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
Martin Laurenzis;E. Bacher;T. Seets;A. Ingle;A. Velten;F. Christnacher
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文献类型：
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作者：
Martin Laurenzis;E. Bacher;T. Seets;A. Ingle;A. Velten;F. Christnacher
单光子计数雪崩二极管（SPADs）是一种多功能传感器，用于主动和时间相关的测量，如测距和荧光成像。这些探测器在被动或不相关成像方面也有很大的潜力。最近，通过确定平均光子到达时间，证明了光子通量的被动成像是可能的。对于环境光照明，时间戳数据可以解释为光子撞击率的度量。各种应用已经被研究，包括高动态范围成像，单光子成像，以及捕获快速移动的物体或动态场景。然而，噪声和运动模糊的出现需要复杂的信号处理，通过运动补偿实现亚像素分辨率成像和场景重建。在本文中，我们提出了关于全局场景运动评价的新结果。在我们的方法中，运动是由一个旋转的楔棱镜有意产生的，从而在一个圆形路径上产生连续的全局运动。我们研究了不同光学对比度的场景。
Single photon counting avalanche diodes (SPADs) are versatile sensors for active and time-correlated measurements such as ranging and fluorescence imaging. These detectors also have great potential for passive or uncorrelated imaging. Recently, it was demonstrated that passive imaging of photon flux is possible by determining the mean photon arrival time. For ambient light illumination, timestamp data can be interpreted as a metric for the photon impingement rate. Various applications have been investigated including high-dynamic-range imaging, single-photon imaging, and capture of fast-moving objects or dynamic scenes. However, the appearance of noise and motion blur requires sophisticated signal processing that enables sub-pixel resolution imaging and reconstruction of the scene by motion compensation. In this paper, we present new results on the evaluation of global scene motion. In our approach, motion is intentionally generated by a rotating wedge prism, resulting in continuous global motion on a circular path. We have studied scenes with different optical contrast.