Zha Linbin, Meng Wenwen, Shi Dongfeng, Huang Jian, Yuan Kee, Yang Wei, Chen Yafeng, Wang Yingjian
Opt Lett. 2022 Feb 15;47(4):870-873. doi: 10.1364/OL.451037.
Target tracking has found important applications in particle tracking, vehicle navigation, aircraft monitoring, etc. However, employing single-pixel imaging techniques to track a fast-moving object with a high frame rate is still a challenge, due to the limitation of the modulation frequency of the spatial light modulator and the number of required patterns. Here we report a complementary single-pixel object tracking approach which requires only two geometric moment patterns to modulate the reflected light from a moving object in one frame. Using the complementary nature of a digital micromirror device (DMD), two identical single-pixel detectors are used to measure four intensities which can be used to acquire the values of zero-order and first-order geometric moments to track the centroid of a fast-moving object. We experimentally demonstrate that the proposed method successfully tracks a fast-moving object with a frame rate of up to 11.1 kHz in the first two experiments. In the third experiment, we compare previous works and find that the method can also accurately track a fast-moving object with a changing size and moving speed of 41.8 kilopixel/s on the image plane. The root mean squared errors in the transverse and axial directions are 0.3636 and 0.3640 pixels, respectively. The proposed method could be suitable for ultrafast target tracking.
目标跟踪在粒子跟踪、车辆导航、飞机监测等领域有着重要应用。然而，由于空间光调制器的调制频率限制和所需图案数量的限制，采用单像素成像技术以高帧率跟踪快速移动的物体仍然是一项挑战。在此，我们报告一种互补单像素目标跟踪方法，该方法在一帧中仅需两个几何矩图案来调制来自移动物体的反射光。利用数字微镜器件（DMD）的互补特性，使用两个相同的单像素探测器来测量四个强度，这些强度可用于获取零阶和一阶几何矩的值，以跟踪快速移动物体的质心。在前两个实验中，我们通过实验证明所提出的方法成功地以高达11.1 kHz的帧率跟踪快速移动的物体。在第三个实验中，我们比较了先前的工作，发现该方法还能在图像平面上准确跟踪尺寸变化且移动速度为41.8千像素/秒的快速移动物体。横向和轴向的均方根误差分别为0.3636和0.3640像素。所提出的方法可能适用于超快速目标跟踪。
