A Super-resolution Reflective Terahertz 3D Object Reconstruction Imaging Method

A technology of three-dimensional target and imaging method, which is applied in the direction of using re-radiation, electromagnetic wave re-radiation, instruments, etc., can solve problems such as radial resolution limitation, and achieve the effect of low cost, high efficiency and wide range of use

Active Publication Date: 2021-10-15
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a super-resolution reflective terahertz three-dimensional target reconstruction imaging method, which introduces the generalized matrix beam method to numerically calculate the actual scattering point information, improves its imaging resolution, and solves the problem of terahertz Radial Resolution Limited by Bandwidth in 3D Object Reconstruction

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  • A Super-resolution Reflective Terahertz 3D Object Reconstruction Imaging Method
  • A Super-resolution Reflective Terahertz 3D Object Reconstruction Imaging Method
  • A Super-resolution Reflective Terahertz 3D Object Reconstruction Imaging Method

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Embodiment 1

[0067] Example 1. Super-resolution terahertz target reconstruction method based on generalized matrix beam method

[0068] The generalized matrix beam method has a higher resolution than the direct application of the inverse Fourier transform method to obtain the pole information. The present invention innovatively applies the idea of ​​the method to terahertz three-dimensional imaging, breaks through the limitation of bandwidth in the system, and obtains the reconstruction result of super-resolution imaging. The original frequency-domain sampling frequency point signal is expressed in the form of scattered point complex exponential, that is, Then construct the matrix bundle, and use the matrix analysis method to find z i , and then according to Find the corresponding reflection coefficient A i , time delay τ i , use enhancement and threshold processing in image processing to remove the influence of noise, and finally reconstruct the target.

[0069] figure 2 It is th...

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Abstract

The invention relates to a super-resolution reflective electromagnetic wave three-dimensional target reconstruction imaging method, which performs normalization processing on the three-dimensional original complex number matrix; performs focusing processing on the normalized three-dimensional original complex number matrix; applies a generalized matrix beam to the focused data method, calculate and search radial scattering points coordinate by coordinate, and then calculate the radial position coordinates and corresponding reflection coefficients of the scattering points; after image threshold processing, use the reflection coefficient as the color information of the pixel points, combine the target in 3D reconstructed in space. The invention introduces the use of generalized matrix beam method to search for the scattering points representing the target, which can break through the limitation of physical conditions, realize the super-resolution reconstruction of the target, apply the traditional detection system, do not need modules such as physical focusing, and have low cost and high efficiency and a wide range of applications .

Description

technical field [0001] The invention relates to the field of reflective three-dimensional target imaging, in particular to a super-resolution reflective terahertz three-dimensional target reconstruction imaging method. Background technique [0002] Terahertz generally refers to electromagnetic waves with a frequency of 0.1-10THz. Due to its unique characteristics, it has attracted widespread attention in recent years. In nature, the vibrations of many biological macromolecules are in this frequency band, which provides an effective means for the detection of biological characteristics; terahertz photon energy is low, it will not cause damage to the detection object, and can achieve non-destructive testing; Electrical materials and non-polar substances have penetrating capabilities and can be used as a means of concealed object detection. [0003] Terahertz imaging is an important part of the above-mentioned applications. Generally, there are two ways to improve the resoluti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/89G01S7/48
CPCG01S7/4802G01S17/89
Inventor 祁峰雷静
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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