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RANSAC-based ISAR image three-dimensional reconstruction method

A three-dimensional reconstruction and image technology, applied in the field of radar, can solve the problems of reduced dimension, high hardware cost, and high radar requirements, and achieve the effect of reducing the required time and improving the accuracy.

Pending Publication Date: 2021-10-15
XIDIAN UNIV
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Problems solved by technology

The 2D ISAR image is the projection of the 3D target on the range Doppler plane. Due to the reduction of the dimension, the 2D imaging has some unavoidable disadvantages; for example, the azimuth of the 2D ISAR image only reflects the Doppler of each scattering point. Le distribution, cannot reflect the high-dimensional information of the target, let alone obtain the attitude information of the target from the two-dimensional image
It can be seen that the above method not only has relatively high hardware cost, but also has high requirements for radar

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Embodiment Construction

[0069] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.

[0070] See figure 1 , the RANSAC-based ISAR image three-dimensional reconstruction method provided by the embodiment of the present invention is applied to a distributed radar system, and the distributed radar system includes a first radar and a second radar;

[0071] The above-mentioned RANSAC-based ISAR image three-dimensional reconstruction method includes:

[0072] S101. The first radar receives the echo signal to obtain a first ISAR image, and the second radar receives the echo signal to obtain a second ISAR image;

[0073] S102. Convert the first ISAR image into a first scatter point set and convert the second ISAR image into a second scatter point set by using a scatter center extraction algorithm;

[0074] S103. Using the random sampling consensus RANSAC algorithm to match the first scatt...

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Abstract

The invention discloses an RANSAC-based ISAR image three-dimensional reconstruction method which is applied to a distributed radar system and comprises a first radar and a second radar; the method comprises the steps that the first radar and the second radar receive echo signals respectively to obtain a first ISAR image and a second ISAR image, the first ISAR image is converted into a first scattering point set through a scattering center extraction algorithm, the second ISAR image is converted into a second scattering point set, the first scattering point set and the second scattering point set are matched through a random sampling consensus algorithm, the incident angle estimation value of the first radar and the height estimation value of each scattering point in the first scattering point set are further determined, so that the three-dimensional reconstruction image of the target is obtained, the problems of ISAR image rotation, scaling, distortion and the like are solved while the cost is reduced, and the three-dimensional reconstruction precision is improved; in addition, the method employs RANSAC to carry out scattering point set matching, and also reduces the time consumption of the three-dimensional reconstruction process.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a RANSAC-based ISAR image three-dimensional reconstruction method. Background technique [0002] Inverse Synthetic Aperture Radar (ISAR) is widely used because it can perform all-day and all-weather high-resolution imaging of non-cooperative targets. The 2D ISAR image is the projection of the 3D target on the range Doppler plane. Due to the reduction of the dimension, the 2D imaging has some unavoidable disadvantages; for example, the azimuth of the 2D ISAR image only reflects the Doppler of each scattering point. The Le distribution cannot reflect the high-dimensional information of the target, let alone obtain the attitude information of the target from the two-dimensional image. Therefore, the research on 3D reconstruction of objects has received extensive attention. [0003] In the related art, the three-dimensional reconstruction method can be realized by using a monostatic ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S13/9064G01S13/9021G01S7/41
Inventor 邢孟道严棒棒徐丹
Owner XIDIAN UNIV
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