Target information automatic extraction method and system for single photon imaging in strong noise environment

Abstract

The invention belongs to the technical field of laser radars, and particularly relates to a target information automatic extraction method and system for single photon imaging in a strong noise environment. The problem that an existing single-photon imaging technology based on high-speed electronic gating is limited in practicability due to the fact that target distribution information is unknown and the existing single-photon imaging technology depends on manual design and parameter adjustment is solved. The method mainly comprises the steps of collecting original three-dimensional echo data, determining algorithm initial parameters, estimating an algorithm initial gating threshold value m and a corresponding algorithm gating range, calculating a current residual value and a gating range correction value, and updating the algorithm gating threshold value and the gating range. According to the method, a gating time interval does not need to be preset, and a large dynamic range of echo signals is ensured; and the extraction of a target signal is realized by adopting algorithm-level gating, so that the signal-to-noise ratio of the signal is greatly improved.

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

Images