Zhang Huan, Liu Zonghao, Zhou Mi, Zhang Zibang, Chen Muku, Geng Zihan
Opt Lett. 2024 Jul 1;49(13):3628-3631. doi: 10.1364/OL.521176.
Real-time tracking and 3D trajectory computation of fast-moving objects is a promising technology, especially in the field of autonomous driving. However, existing image-based tracking methods face significant challenges when it comes to real-time tracking, primarily due to the limitation of storage space and computational resources. Here, we propose a novel approach that enables real-time 3D tracking of a fast-moving object without any prior motion information and at a very low computational cost. To enable 3D coordinate synthesis with a space-efficient optical setup, geometric moment patterns are projected on two non-orthogonal planes with a spatial resolution of 125 μm. Our experiment demonstrates an impressive tracking speed of 6667 frames per second (FPS) with a 20 kHz digital micromirror device (DMD), which is more than 200 times faster than the widely adopted video-based tracking methods. To the best of our knowledge, this is the highest tracking speed record in the field of single-pixel 3D trajectory tracking. This method promotes the development of real-time tracking techniques with single-pixel imaging (SPI).
快速移动物体的实时跟踪和三维轨迹计算是一项很有前景的技术，尤其是在自动驾驶领域。然而，现有的基于图像的跟踪方法在实时跟踪方面面临重大挑战，主要是由于存储空间和计算资源的限制。在此，我们提出了一种新颖的方法，能够在无需任何先验运动信息的情况下，以非常低的计算成本对快速移动物体进行实时三维跟踪。为了通过空间高效的光学装置实现三维坐标合成，几何矩图案以125μm的空间分辨率投影到两个非正交平面上。我们的实验表明，使用20kHz数字微镜器件（DMD）时，跟踪速度达到了每秒6667帧（FPS），这比广泛采用的基于视频的跟踪方法快200多倍。据我们所知，这是单像素三维轨迹跟踪领域的最高跟踪速度记录。该方法推动了单像素成像（SPI）实时跟踪技术的发展。
