激光雷达
跟踪(教育)
计算机科学
计算机视觉
人工智能
光学
噪音(视频)
图像分辨率
物理
心理学
教育学
图像(数学)
作者
Chi Zhang,Guangneng Dong,Haifeng Qu,Zhao Zhi-yuan,Fengchao Peng,LAN yi jun,GAO Ning-bo,SI Guang-fu
出处
期刊:AOPC 2021: Optical Sensing and Imaging Technology
日期:2021-12-21
摘要
A single photon array imaging lidar(SPAIL) based on the Geiger model has the characteristics of small size, high-sensitivity detection, high-resolution, non-scanning imaging and can realize the characteristics of undistorted three dimensional image of dynamic/static targets. However, In the case of high resolution, the instantaneous imaging field of view is small. To achieve high-precision recognition and tracking of targets in a large dynamic range, a high-precision servo and tracking system is required to completes the closed-loop tracking control of the target. A SPAIL platform incorporating a 64×64 array of Geiger-mode APD is constructed for validation and demonstration. The SPAIL is composed of three modules: scanning unit, optical transmitting and receiving unit, detection and processing unit. The scanning system uses a 26-bit high-precision encoder as the position loop detection element. The transmitting laser has a working wavelength of 1064.1nm, a working frequency of 10khz, a pulse width of 2ns.Subsequently, The optical receiving aperture of the laser is 60mm, and the line width of the narrowband filter is 0.1nm that filter out background noise interference. Multi-frame image correlation and dynamic threshold adjustment are used to complete target recognition, and the target tracking algorithm of Mean shift is used to extract the target. Under good weather conditions, during the dynamic scanning process of lidar, the target distinguished the 6km tower is completed respectively. SPAIL completed the real-time tracking and measurement of the 300m flying UAV (Unmanned Air Vehicle). In the future, the fusion of laser array image and visible light/infrared image information will be researched.
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