Building wall imaging method and device using coupling mode dictionary learning

A technique of dictionary learning and coupling mode, which is applied in the field of building wall imaging using coupling mode dictionary learning, can solve problems such as position offset, dictionary and imaging scene mismatch, wall image defocus, etc., to reduce the amount of data Effect

Active Publication Date: 2018-11-27
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] The object of the present invention is to provide a building wall imaging method, device and computer-readable storage medium using coupling mode dictionary learning, aiming at solving complex situations in building layout imaging, due to unknown quantity, position, wall parameters and measurement noise lead to the mismatch between the dictionary and the imaging scene, resulting in the problem of defocusing and position shifting of the wall image

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  • Building wall imaging method and device using coupling mode dictionary learning
  • Building wall imaging method and device using coupling mode dictionary learning
  • Building wall imaging method and device using coupling mode dictionary learning

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Embodiment 1

[0026] see figure 1 , the building wall imaging method using the coupling mode dictionary learning provided by Embodiment 1 of the present invention includes the following steps: It should be noted that if there are substantially the same results, the building wall imaging method using the coupling mode dictionary learning of the present invention The imaging method does not figure 1 The flow sequence shown is limited.

[0027] S101. Receive the echo signal of the wall of the target building collected by the antenna pulse system radar system.

[0028] In Embodiment 1 of the present invention, the echo signal of the wall of the target building is collected in the following manner:

[0029] The antenna pulse system radar system uses a co-located antenna to scan the imaging area of ​​the target building wall in a synthetic aperture manner, such as figure 2 As shown, the antenna adopts a narrow pulse signal whose transmitted signal is expressed as s(t), s(t)=exp(-2π 2 f 2 (t...

Embodiment 2

[0072] see Figure 5 The building wall imaging device using coupling mode dictionary learning provided by Embodiment 2 of the present invention includes:

[0073] The receiving module 11 is used to receive the echo signal of the target building wall collected by the antenna pulse system radar system;

[0074] The compressed sampling module 12 is used to compress and sample the echo signal of the wall of the target building through the random measurement matrix to obtain the observed value vector;

[0075] Construction module 13, for designing the imaging dictionary according to the free space propagation characteristics, and constructing the compressed sensing model based on the observation value vector and the imaging dictionary;

[0076] The reconstruction module 14 is used to reconstruct the sparse signal vector of the image behind the wall through the coupled mode Bayesian dictionary learning algorithm according to the compressed sensing model, so as to obtain ...

Embodiment 3

[0079] Embodiment 3 of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the dictionary learning using coupling mode as provided in Embodiment 1 of the present invention. The steps of the building wall imaging method.

[0080] In the present invention, since the sparse signal vector of the image behind the wall is reconstructed through the coupled mode Bayesian dictionary learning algorithm, there is no need to pre-set prior information such as noise variance and sparsity, and the structural sparsity of the coupled mode is integrated into Among them, compared with the existing methods, the reconstruction performance of the extended object reflection coefficient of the wall in SOI is improved as a whole, and it can better solve the unknown quantity, position, wall parameters and measurement noise that cause the mismatch betw...

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Abstract

The invention provides a building wall imaging method and device using coupling mode dictionary learning suitable for the field of building wall imaging. The method comprises that an echo signal, collected by a radar system of an antenna pulse system, of a target building wall is received; a random measurement matrix is used to compress and sample the echo signal of the target building wall to obtain an observation value vector; an imaging dictionary is designed according to propagation characteristic of the free space, and a compressed sensing model is established on the basis of the observation value vector and imaging dictionary; and according to the compressed sensing model, a sparse signal vector of a behind-wall image is reconstructed via a coupling mode Bayesian dictionary learningalgorithm, and an image of the building wall is obtained. Compared with a present method, a reconstruction performance of a wall extended target reflection coefficient in SOI is improved wholly, the problems including defocusing and position offset of the wall image due to the facts that the quantity, position and wall parameters are unknown and a measurement noise causes mismatching between the dictionary and the imaging scene can be solved effectively, and the data number needed by imaging is reduced effectively.

Description

technical field [0001] The invention belongs to the field of building wall imaging, in particular to a building wall imaging method and device using coupling mode dictionary learning. Background technique [0002] The building layout imaging radar penetrates into the building by emitting electromagnetic waves, and then realizes the detection and imaging of the distribution information such as the position and orientation of the building wall. Value. The traditional through-the-wall radar imaging algorithm is mainly based on the backward projection imaging method. Although this method is simple and efficient, its imaging quality requires intensive spatial sampling and time sampling as well as a huge storage data space to be guaranteed. [0003] In general, the synthetic aperture array or real array used to detect the structural layout of buildings is parallel to the front wall, so the imaging of all walls parallel to the front wall must become the main body of the region of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89G01S7/41
CPCG01S7/41G01S13/89
Inventor 晋良念冯飞谢辉玉纪元法孙希延刘庆华谢跃雷蒋俊正欧阳缮
Owner GUILIN UNIV OF ELECTRONIC TECH
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