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Fixed value noise determining method and fixed value noise removing method for area array laser detector

A technology of laser detector and determination method, which is applied to instruments, measuring devices, and re-radiation of electromagnetic waves, etc., can solve the problems that fixed-value noise cannot be effectively eliminated, and the accuracy of target recognition is not high, and achieves low test cost and target detection accuracy. High, complete effect of surface information

Active Publication Date: 2020-04-03
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a fixed-value noise determination method and removal method of an area array laser detector, which is used to solve the problem that the target recognition accuracy is not high because the fixed-value noise cannot be effectively eliminated in the distance recovery of the existing area array laser detector. technical problem

Method used

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  • Fixed value noise determining method and fixed value noise removing method for area array laser detector
  • Fixed value noise determining method and fixed value noise removing method for area array laser detector
  • Fixed value noise determining method and fixed value noise removing method for area array laser detector

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Embodiment 1

[0038] A fixed-value noise determination method 100 for an area array laser detector, such as figure 1 shown, including:

[0039] S110. Collect multiple frames of images of the target through the area array laser;

[0040] S120. Count the histograms of the above multi-frame images;

[0041] S130. Based on the above histogram, determine the distance value corresponding to the fixed-value noise through adjacent distance value difference calculation and threshold judgment, and complete the determination of the fixed-value noise of the area array laser.

[0042] A histogram is a graph of the relationship between each distance value and its corresponding count total.

[0043] Through histogram statistics, the fixed-value noise distance value in the laser image is highlighted, and the fixed-value noise distance position is more prominent. In addition, by making a difference and comparing the counts corresponding to the adjacent distance values ​​in the statistical histogram, the ...

Embodiment 2

[0059] A method for removing fixed-value noise in distance restoration of an area array laser detector, comprising:

[0060] A method for determining the fixed-value noise of an area laser detector as described in Embodiment 1 is used to determine the distance value corresponding to the fixed-value noise of the area array laser detector; The corresponding distance value is not counted, and the removal of fixed value noise is completed.

[0061] In order to better illustrate the present invention, the following fixed-value noise removal is performed based on the fixed-value noise distance value obtained in the example in Embodiment 1:

[0062] For the obtained data of the fixed-value noise distance value, the data at the distance value will not be counted in subsequent cumulative detections. Imaging the data after removing the fixed-value noise, the obtained 400-frame cumulative distance image and intensity image are as follows: Figure 8 , Figure 9 Shown; the statistical r...

Embodiment 3

[0064] A storage medium, in which instructions are stored, and when the computer reads the instructions, the computer is made to execute the method for determining the fixed-value noise of an area array laser detector as described in the first embodiment above and / or A method for removing fixed-value noise in distance restoration of an area array laser detector as described in Embodiment 2 above.

[0065] The relevant technical solutions are the same as those in Embodiment 1 and Embodiment 2, and will not be repeated here.

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Abstract

The invention belongs to the field of imaging automatic target recognition, and particularly discloses a fixed value noise determination method and a fixed value noise removal method for an area arraylaser detector, which comprises the following steps: acquiring multiple frames of images of a target through an area array laser; counting histograms of the multiple frames of images; and determininga distance value corresponding to the fixed-value noise through adjacent distance value difference calculation and threshold judgment based on a statistical histogram, and not counting data at the distance value in subsequent accumulated detection according to the fixed-value noise distance value, thereby obtaining a laser distance image and an intensity image of which the fixed-value noise is removed. According to the invention, through histogram statistics, a fixed value noise distance value in a laser image is highlighted; counts corresponding to adjacent distance values in a statistical histogram are subtracted and compared, the position of fixed value noise is located, the method can be effectively used for removing the fixed value noise and recovering part of target distance information at the fixed value noise, surface information is more complete, and therefore the imaging effect of the Gm-APD laser detector can be effectively improved.

Description

technical field [0001] The invention belongs to the field of imaging automatic target recognition, and more specifically relates to a method for determining and removing fixed-value noise of an area array laser detector. Background technique [0002] Geiger-mode Single Avalanche PhotoDiode (GmSAPD or GmAPD) lidar is a new system of three-dimensional detection lidar. Lidar based on Geiger-mode avalanche photodiodes uses laser single pulses to directly obtain distance information without linear accumulation or spatial scanning. Geiger APD lidar can provide three-dimensional imaging of target scenes over 3 kilometers with a small laser emission power, providing a new way for precision-guided weapons to detect targets and resist interference. [0003] Geiger APD lidar has high sensitivity and is easily affected by noise. Noise suppression on laser detection data is a necessary link to obtain effective information. When the laser works in the Geiger mode, as long as it receives...

Claims

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Application Information

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IPC IPC(8): G01S17/894G01S17/10G01S7/481G01S7/4863G01S7/487
CPCG01S17/89G01S17/10G01S7/4817G01S7/4863G01S7/487
Inventor 桑红石李立张天序涂直健刘羽丰姜鹏付宏明孙剑锋
Owner HUAZHONG UNIV OF SCI & TECH
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