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Study on super-resolution three-dimensional range-gated imaging technology

机译：超分辨率三维距离门控成像技术研究

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Range-gated three dimensional imaging technology is a hotspot in recent years, because of the advantages of high spatial resolution, high range accuracy, long range, and simultaneous reflection of target reflectivity information. Based on the study of the principle of intensity-related method, this paper has carried out theoretical analysis and experimental research. The experimental system adopts the high power pulsed semiconductor laser as light source, gated ICCD as the imaging device, can realize the imaging depth and distance flexible adjustment to achieve different work mode. The imaging experiment of small imaging depth is carried out aiming at building 500m away, and 26 group images were obtained with distance step 1.5m. In this paper, the calculation method of 3D point cloud based on triangle method is analyzed, and 15m depth slice of the target 3D point cloud are obtained by using two frame images, the distance precision is better than 0.5m. The influence of signal to noise ratio, illumination uniformity and image brightness on distance accuracy are analyzed. Based on the comparison with the time-slicing method, a method for improving the linearity of point cloud is proposed.
机译：由于高空间分辨率，高距离精度，远距离和同时反射目标反射率信息的优势，距离门控三维成像技术是近年来的热点。在研究强度相关方法原理的基础上，进行了理论分析和实验研究。实验系统采用大功率脉冲半导体激光器作为光源，门控ICCD作为成像装置，可以实现成像深度和距离的灵活调节，以实现不同的工作模式。针对500m远的建筑物进行了小成像深度的成像实验，以距离步长1.5m获得了26组图像。本文分析了基于三角法的3D点云计算方法，并利用两帧图像获得了目标3D点云的15m深度切片，距离精度优于0.5m。分析了信噪比，照度均匀度和图像亮度对距离精度的影响。在与时间分割方法比较的基础上，提出了一种改进点云线性度的方法。

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