CN-116466347-B - Near-field synthetic aperture radar data analysis and imaging processing method and device

CN116466347BCN 116466347 BCN116466347 BCN 116466347BCN-116466347-B

Abstract

The application discloses a near-field synthetic aperture radar data analysis and imaging processing method and device, which comprise the steps of obtaining radar data, importing imaging frame speed data, generating a speed curve graph based on the imaging frame speed data, imaging part of imaging frame speed data in the imaging frame speed data to generate part of data images, detecting errors of the quality of the part of data images generated by the imaging frame speed data based on the speed curve graph, controlling to correct and fit the current frame speed data when the errors exist, generating and storing a single-frame synthetic aperture radar image based on the corrected speed data, and carrying out continuous synthetic aperture radar imaging based on fitted speed parameters to synthesize a high-frame-rate video stream. According to the SAR imaging system, the original SAR data is processed and analyzed, the radar imaging configuration is modified in real time, the debugging steps of the influence of different parameters on the imaging quality are simplified, and systematic, real-time and visual SAR imaging is realized.

Inventors

ZHAO BO
CAI MENGXIA
HUANG LEI
CHEN JI
LIANG CHENGMEI
MAO JUNFA

Assignees

深圳大学

Dates

Publication Date: 20260512
Application Date: 20230426

Claims (8)

1. A near field synthetic aperture radar data analysis and imaging processing method, the method comprising: acquiring radar data for imaging; Processing and analyzing the acquired radar data, importing imaging frame speed data corresponding to the radar data, generating a speed curve graph based on the imported imaging frame speed data corresponding to the radar data, and imaging part of imaging frame speed data in the imaging frame speed data to generate part of data images; performing error detection on the partial data image quality generated from the imaging frame rate data based on the velocity profile; the step of error detecting the partial data image quality generated from the imaging frame rate data based on the velocity profile includes: acquiring a partial data image generated by imaging based on the partial imaging frame rate data: Controlling the partial data image, comparing and displaying the position of the corresponding frame image of the speed curve graph with the corresponding frame optical image, and judging whether an error exists or not; When the position of the corresponding frame image of the speed curve graph is compared with the corresponding frame optical picture and displayed with deviation, judging that the quality of the partial data image generated by the current imaging frame rate data has errors; when the image quality of partial data generated by the current imaging frame rate data has errors, controlling to correct and fit the current frame rate data, generating and saving a single-frame synthetic aperture radar image based on the corrected speed data, and saving corrected and fitted speed parameters in real time; and when the image quality of partial data generated by the current imaging frame rate data has errors, controlling to correct the current frame rate data, generating and storing a single-frame synthetic aperture radar chart based on the corrected rate data, and storing corrected and fitted rate parameters in real time, wherein the steps of controlling the correction of the current frame rate data comprise the following steps: When the image quality of partial data generated by the current imaging frame rate data has errors, controlling the current frame rate data to be corrected and fitted; interpolation is carried out on the error part, a Interp interpolation function or a spline interpolation function is utilized to fit a speed curve, and corrected and fitted speed parameters are stored in real time; Generating a single-frame synthetic aperture radar image based on the correction speed data and storing the single-frame synthetic aperture radar image; And carrying out continuous synthetic aperture radar imaging based on the fitted speed parameters, and synthesizing a high-frame-rate video stream.
2. The near field synthetic aperture radar data analysis and imaging processing method of claim 1, wherein the step of acquiring radar data for imaging comprises: acquiring radar data for imaging; The method comprises the steps of reading initial parameters of radar imaging, including sampling rate, frequency modulation, repetition frequency, sampling point number, carrier frequency, oblique viewing angle, distance range, beam width, accumulation point number, stepping point number, enhancement coefficient, color space and radar placement position.
3. The near field synthetic aperture radar data analysis and imaging processing method of claim 1, wherein the steps of processing and analyzing the acquired radar data, importing imaging frame rate data corresponding to the radar data, generating a velocity profile based on the imported imaging frame rate data corresponding to the radar data, and imaging a portion of the imaging frame rate data to generate a portion of the data image include: Processing and analyzing the acquired radar data, and loading imaging frame rate data in initial parameters of the radar data; generating a velocity profile based on the imported imaging frame rate data corresponding to the radar data; partial imaging frame rate data is extracted from the imaging frame rate data, and the partial imaging frame rate data is imaged to generate a partial data image.
4. A near field synthetic aperture radar data analysis and imaging processing method as claimed in claim 3 wherein the step of generating a velocity profile based on imported imaging frame rate data corresponding to the radar data comprises: Based on the imported imaging frame rate data corresponding to the radar data, fitting a velocity curve as sample data points, and generating a velocity curve.
5. The near field synthetic aperture radar data analysis and imaging processing method of claim 1, wherein the step of performing continuous synthetic aperture radar imaging based on the fitted speed parameter and synthesizing a high frame rate video stream comprises: Based on the fitted speed parameters, a BP algorithm or a 2D-FFT algorithm is adopted to realize continuous synthetic aperture radar imaging, and then the images are synthesized into a high-frame-rate video stream and output.
6. A near field synthetic aperture radar data analysis and imaging processing apparatus for implementing the near field synthetic aperture radar data analysis and imaging processing method according to any one of claims 1 to 5, the apparatus comprising: an acquisition module for acquiring radar data for imaging; The system comprises an importing and generating module, a processing and analyzing module and a processing and analyzing module, wherein the importing and generating module is used for processing and analyzing the acquired radar data and importing imaging frame speed data corresponding to the radar data; generating a speed curve graph based on the imported imaging frame rate data corresponding to the radar data, and imaging part of imaging frame rate data in the imaging frame rate data to generate part of data images; An error detection module for performing error detection on the partial data image quality generated from the imaging frame rate data based on the velocity profile; the correction and fitting module is used for controlling the correction and fitting of the current frame speed data when errors exist in the image quality of partial data generated by the current imaging frame speed data, generating and saving a single-frame synthetic aperture radar image based on the correction speed data, and saving the corrected and fitted speed parameters in real time; and the imaging control module is used for carrying out continuous synthetic aperture radar imaging based on the fitted speed parameters and synthesizing a high-frame-rate video stream.
7. An intelligent terminal comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-5.
8. A non-transitory computer readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of any one of claims 1-5.

Description

Near-field synthetic aperture radar data analysis and imaging processing method and device Technical Field The invention relates to the technical field of computer information processing, in particular to a near-field synthetic aperture radar data analysis and imaging processing method and device, an intelligent terminal and a storage medium. Background SAR (Synthetic Aperture Radar), namely a synthetic aperture radar, is an active earth observation system, can be installed on platforms such as an airplane, a satellite, an automobile and the like, can observe the earth all the time and all the weather, and has certain earth surface penetrating capacity. Due to the advantages of high resolution of Synthetic Aperture Radar (SAR), no decrease with distance, and the like, the method is widely applied to the fields of military, civil use, and the like. The satellite-borne platform has the limitations of wide detection coverage area, relatively fixed satellite orbit and incapability of randomly changing the observation area, the requirement of the airborne platform on landing places is high, and the flexibility of the vehicle-mounted platform and the unmanned airborne platform is high, the platform is small and the maneuvering performance is good, so that the satellite-borne platform has very strong practical significance for the research of near-field Synthetic Aperture Radar (SAR) imaging. The traditional method is to process and analyze original SAR data by adopting different imaging algorithms aiming at near field SAR (synthetic aperture radar) imaging, and according to the quality of imaging, the operations such as filtering, correcting and fitting are carried out on estimated speed data to obtain a high-precision SAR image. In the prior art, because a near field SAR (synthetic aperture radar) imaging platform has various imaging algorithms, parameters need to be directly modified from codes each time, the rationality of correction data is judged according to imaging quality, the operability of SAR imaging is low, the longer the data are analyzed and processed, the longer the time is analyzed and processed, in addition, the different placement positions of radars on automobiles or unmanned aerial vehicles and the like, the longer the imaging time is, and the imaging efficiency is low. Accordingly, there is a need for improvement and development in the art. Disclosure of Invention Aiming at the defects in the prior art, the application provides a near-field synthetic aperture radar data analysis and imaging processing method, a near-field synthetic aperture radar data analysis and imaging processing device, an intelligent terminal and a storage medium. The technical scheme adopted by the invention for solving the problems is as follows: a near field synthetic aperture radar data analysis and imaging processing method, wherein the method comprises: acquiring radar data for imaging; Processing and analyzing the acquired radar data, importing imaging frame speed data corresponding to the radar data, generating a speed curve graph based on the imported imaging frame speed data corresponding to the radar data, and imaging part of imaging frame speed data in the imaging frame speed data to generate part of data images; performing error detection on the partial data image quality generated from the imaging frame rate data based on the velocity profile; when the image quality of partial data generated by the current imaging frame rate data has errors, controlling to correct and fit the current frame rate data, generating and saving a single-frame synthetic aperture radar image based on the corrected speed data, and saving corrected and fitted speed parameters in real time; And carrying out continuous synthetic aperture radar imaging based on the fitted speed parameters, and synthesizing a high-frame-rate video stream. The near-field synthetic aperture radar data analysis and imaging processing method, wherein the step of acquiring radar data for imaging comprises the following steps: acquiring radar data for imaging; The method comprises the steps of reading initial parameters of radar imaging, including sampling rate, frequency modulation, repetition frequency, sampling point number, carrier frequency, oblique viewing angle, distance range, beam width, accumulation point number, stepping point number, enhancement coefficient, color space and radar placement position. The near-field synthetic aperture radar data analysis and imaging processing method comprises the steps of processing and analyzing acquired radar data, importing imaging frame speed data corresponding to the radar data, generating a speed curve graph based on the imported imaging frame speed data corresponding to the radar data, and imaging part of imaging frame speed data to generate part of data images, wherein the steps comprise: Processing and analyzing the acquired radar data, and loading imaging frame rate data in initial parameters of the radar