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Strong scattering bright target interference elimination method in millimeter wave human body imaging

A technology for human imaging and interference elimination, applied in the field of measurement and testing, can solve problems such as interference with the screening effect of dangerous goods, and achieve the effects of improving traffic efficiency, uniform image texture, and high accuracy.

Pending Publication Date: 2022-05-13
BEIJING RES INST OF TELEMETRY +3
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural structures such as human bones and skin often form dihedral or trihedral angles, which can easily cause strong bright spots or lines in the two-dimensional millimeter-wave visual image of the human body, which seriously interferes with the screening effect of dangerous goods carried by the human body

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  • Strong scattering bright target interference elimination method in millimeter wave human body imaging
  • Strong scattering bright target interference elimination method in millimeter wave human body imaging
  • Strong scattering bright target interference elimination method in millimeter wave human body imaging

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Embodiment 1

[0034] Such as figure 1 As shown, a strong scattering bright target interference elimination method in millimeter-wave human body imaging includes the following steps:

[0035] S1. Three-dimensional image reconstruction processing: use the millimeter-wave three-dimensional imaging equipment to obtain the echo data of the human target, and use the three-dimensional holographic imaging algorithm to process the echo data of the human target to obtain the three-dimensional imaging result S ijk , where 1≤i≤N y , 1≤j≤N x , 1≤k≤N z , N y is the number of imaging points in the y direction of the 3D imaging result, N x is the number of imaging points in the x direction of the 3D imaging result, N z is the number of imaging points in the z-direction from the three-dimensional imaging result, the y-direction is the vertical direction, and the x-direction is the horizontal direction;

[0036] The echo data of the human target is the front echo data and / or the back echo data of the h...

Embodiment 2

[0052] Such as figure 1 As shown, a strong scattering bright target interference elimination method in millimeter-wave human body imaging includes the following steps:

[0053] 1. 3D image reconstruction processing

[0054] Use the millimeter-wave 3D imaging equipment to obtain the echo data of the front (back) of the human target, use the 3D holographic imaging algorithm to process the original echo data, take the amplitude of the processing result, and obtain the 3D imaging result S of the front (back) of the human target ijk , where 1≤i≤N y , 1≤j≤N x , 1≤k≤N z , N y is the number of imaging points in the vertical y direction of the 3D imaging result, N x is the number of imaging points in the horizontal x direction of the 3D imaging result, N z is the number of imaging points in the distance direction z of the 3D imaging result.

[0055] 2. Three-dimensional image filtering

[0056] (1) Use the median filter method to filter out the salt and pepper noise in the 3D i...

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Abstract

The invention provides a strong scattering bright target interference elimination method in millimeter wave human body imaging, which comprises the steps of three-dimensional image reconstruction processing, three-dimensional image filtering, human body contour extraction and two-dimensional visual image generation, and utilizes the characteristic that the imaging result of a dihedral angle or a trihedral angle formed by natural structures such as human skeleton and skin is not on the surface of the human body contour. And removing strong bright spots and strong bright lines by extracting human body surface contour data. According to the method, strong bright spots and strong bright lines in the two-dimensional millimeter wave visual image of the human body can be greatly reduced, so that the image texture is uniform, the uniformity characteristic of the skin surface of the human body is reflected more truly, and the strong bright spots and the strong bright lines are prevented from influencing judgment of suspicious articles; therefore, the accuracy of judging the suspicious articles on the human skin surface through human eyes or artificial intelligence by a worker is higher, the time waste caused by uncertain or misjudgment of the suspicious articles by the worker is reduced, and the passing efficiency of security inspection equipment is improved.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a method for eliminating the interference of strong scattering bright targets in millimeter-wave human body imaging. Background technique [0002] In recent years, there are more and more types of items causing hazards, and the traditional means of human security inspection can no longer meet the current security needs. Traditional hand-held metal detectors and metal detection doors can only detect metal contraband carried by the human body, and are powerless against non-metallic prohibited items such as plastic bombs and ceramic knives; although X-ray security inspection equipment can penetrate clothing and image all prohibited items, but There is a certain threat to people's health, and it is not the best means of human security inspection. At present, the millimeter-wave 3D imaging technology can realize the imaging of the human body through clothing, which is...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/20032G06T2207/30196G06T2207/10012G06T5/70
Inventor 张焱郭东文刘强孙兆阳
Owner BEIJING RES INST OF TELEMETRY