Method and system for automatic extraction of target information in single-photon imaging under strong noise environment

Abstract

The invention belongs to the technical field of laser radar, and in particular relates to a method and system for automatically extracting target information of single-photon imaging in a strong noise environment. Overcome the problem of limited practicality of the existing single-photon imaging technology based on high-speed electronic gating due to unknown target distribution information, relying on manual design and adjustment parameters, mainly including collecting original 3D echo data, determining the initial parameters of the algorithm, estimating Algorithm initial gating threshold m and the corresponding algorithm gating range, calculating the current residual value and gating range correction value, and updating the algorithm gating threshold and gating range; this method does not need to preset the gating time interval, ensuring that the echo signal Large dynamic range; and algorithm-level gating is used to extract the target signal, which greatly improves the signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a method and system for automatically extracting target information of single-photon imaging in a strong noise environment. Background technique [0002] Single-photon imaging technology, as one of the mainstream development directions of lidar technology at present, has many advantages over traditional methods in terms of detection sensitivity, photon utilization rate, imaging accuracy and other indicators, so it is widely used in remote imaging, underwater imaging and other extreme Imaging environment under conditions. [0003] Since the echo energy of this technology is generally at the single-photon level, it is often susceptible to interference from various noises such as solar radiation, detector thermal noise, and backscattering. Therefore, it is often necessary to greatly increase the integration time of imaging to improve the echo signal. Signal-to-noise...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the existing single-photon imaging technology based on high-speed electronic gating is limited in practicability due to unknown target distribution information and relying on manual design and adjustment parameters, the present invention provides a target for single-photon imaging in a strong noise environment Information automatic extraction method and system

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