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
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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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