CN108363057A - Synthetic aperture radar detection method, device and storage medium - Google Patents
Synthetic aperture radar detection method, device and storage medium Download PDFInfo
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- CN108363057A CN108363057A CN201810129243.3A CN201810129243A CN108363057A CN 108363057 A CN108363057 A CN 108363057A CN 201810129243 A CN201810129243 A CN 201810129243A CN 108363057 A CN108363057 A CN 108363057A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
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Abstract
This disclosure relates to a kind of synthetic aperture radar detection method, device and storage medium, the method includes：Determine that search coverage, the search coverage include at least the region where target to be observed；It determines that synthetic aperture radar scans the scanning times N of the search coverage, and determines that the observation angle scanned every time in n times scanning, N are the positive integer more than 1；When the synthetic aperture radar passes through the search coverage, the search coverage is scanned according to the scanning times and the observation angle scanned every time, obtains target image.Scheme in the disclosure can carry out omnibearing observation to search coverage, improve the detecting ability of synthetic aperture radar.
Description
Technical field
This disclosure relates to Radar Technology field, and in particular, to a kind of synthetic aperture radar detection method, device and storage
Medium.
Background technology
Synthetic aperture radar (Synthetic Aperture Radar, SAR) is used as a kind of active Aeronautics and Astronautics remote sensing hand
Section, has the characteristics that high resolution, day and night non-stop run, covering domain are wide.So it is in environmental protection, target monitoring, army
Thing, which is reconnoitred equal fields and suffered from, to be widely applied, and has become the most important of high-resolution earth observation and global resources management at present
One of means.
In the related technology, SAR system is directed to different application field demands, has developed a variety of different operating modes：
Such as strip-type, scan-type, bunching type, these operating modes are all to carry out single pass imaging to one piece of region.But i.e.
Just synthetic aperture radar is not influenced compared to optical radar by alternation of day and night, light intensity, can also penetrate cloud layer, or even wear
Saturating part overlaid object, but for the complex target of the larger complicated shelter of thickness, volume or multi-scattering centers, SAR systems
System still comprehensively can not be observed and be recognized.
Invention content
To solve technical problem present in the relevant technologies, a kind of synthetic aperture radar detection method of disclosure offer, dress
It sets and storage medium.
According to the first aspect of the embodiments of the present disclosure, a kind of synthetic aperture radar detection method is provided, the method includes：
Determine that search coverage, the search coverage include at least the region where target to be observed；
It determines that synthetic aperture radar scans the scanning times N of the search coverage, and determines and scanned every time in n times scanning
Observation angle, N is positive integer more than 1；
When the synthetic aperture radar passes through the search coverage, according to the scanning times and each scanning
Observation angle the search coverage is scanned, obtain target image.
Optionally, the observation angle includes side view angle and angle of squint, the observation scanned every time in the determining n times scanning
Angle, including：
According to the relative position of the target to be observed and the running track of the synthetic aperture radar, the synthesis is determined
The beam center of aperture radar is irradiated to the side view angle of the target to be observed, wherein the side scanned every time in the n times scanning
Visual angle is identical；
According to the characterisitic parameter of the target to be observed, the angle of squint scanned every time in the n times scanning is determined.
Optionally, the characterisitic parameter according to the target to be observed, determine scanned every time in n times scanning it is oblique
Visual angle, including：
According to the characterisitic parameter of the target to be observed, the angle of squint variation range of the synthetic aperture radar is determined；
The angle of squint variation range is divided into N equal portions, determines the angle of squint scanned every time.
Optionally, it is described according to the scanning times and the observation angle scanned every time to the search coverage into
Row scanning obtains target image, including：
Obtain N width scan image corresponding with n times scanning；
The N width scan image is subjected to image co-registration, obtains the target image.
Optionally, after the acquisition target image, the method further includes：
Image procossing is carried out to the target image；
Target identification is carried out to the target image after image procossing, to detect the target to be observed.
Optionally, the method further includes：
When being scanned to the region to be scanned other than the search coverage, the synthetic aperture radar is controlled to described
Region to be scanned carries out single pass imaging.
According to the second aspect of the embodiment of the present disclosure, a kind of synthetic aperture radar detection device is provided, described device includes：
Area determination module, for determining that search coverage, the search coverage include at least the area where target to be observed
Domain；
Processing module, for determining that synthetic aperture radar scans the scanning times N of the search coverage, and determining n times
The observation angle scanned every time in scanning, N are the positive integer more than 1；
Image collection module, the synthetic aperture radar pass through the search coverage when, according to the scanning times with
And the observation angle scanned every time is scanned the search coverage, obtains target image.
Optionally, the observation angle includes side view angle and angle of squint, the processing module, including：
Side view angle determination sub-module, for according to the target to be observed and the running track of the synthetic aperture radar
Relative position determines that the beam center of the synthetic aperture radar is irradiated to the side view angle of the target to be observed, wherein described
The side view angle scanned every time in n times scanning is identical；
Angle of squint determination sub-module determines every in the n times scanning for the characterisitic parameter according to the target to be observed
The angle of squint of secondary scanning.
Optionally, the angle of squint determination sub-module, including：
First determination sub-module determines the synthetic aperture radar for the characterisitic parameter according to the target to be observed
Angle of squint variation range；
Second determination sub-module, for the angle of squint variation range to be divided into N equal portions, determine it is described scan every time it is oblique
Visual angle.
Optionally, described image acquisition module, including：
First acquisition submodule, for obtaining N width scan image corresponding with n times scanning；
Second acquisition submodule obtains the target image for the N width scan image to be carried out image co-registration.
Optionally, described device further includes：
Image processing module, for carrying out image procossing to the target image；
Identification module, it is described to be observed to detect for carrying out target identification to the target image after image procossing
Target.
Optionally, described device further includes：
Control module, for when being scanned to the region to be scanned other than the search coverage, controlling the synthesis
Aperture radar carries out single pass imaging to the region to be scanned.
According to the third aspect of the embodiment of the present disclosure, a kind of computer readable storage medium is provided, is stored thereon with calculating
Machine program instruction realizes the synthetic aperture radar detection side that disclosure first aspect provides when the program instruction is executed by processor
Step in method.
According to the fourth aspect of the embodiment of the present disclosure, a kind of synthetic aperture radar detection device is provided, described device includes：
The computer readable storage medium that the disclosure third aspect provides；And
One or more processors, for executing the program in the computer readable storage medium.
In the disclosure, synthetic aperture radar takes multiple scan the search coverage when by above search coverage,
And the observation angle scanned every time is different, in this way, the target image for obtaining search coverage is scanned by multiple multi-angle, it can be right
Search coverage carries out omnibearing observation, improves the detecting ability of synthetic aperture radar.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is a kind of flow chart of synthetic aperture radar detection method shown in one exemplary embodiment of the disclosure.
Fig. 2 is for the signal of the target to be observed comprising multiple scattering centers shown in one exemplary embodiment of the disclosure
Figure.
Fig. 3 is the search coverage schematic diagram shown in one exemplary embodiment of the disclosure.
Fig. 4 is the parameter schematic diagram of the satellite-borne synthetic aperture radar shown in one exemplary embodiment of the disclosure.
Fig. 5 is the angle of squint schematic diagram shown in one exemplary embodiment of the disclosure.
Fig. 6 is the flow chart of the synthetic aperture radar detection method shown in one exemplary embodiment of the disclosure.
Fig. 7 is a kind of schematic diagram of synthetic aperture radar detection device shown in one exemplary embodiment of the disclosure.
Specific implementation mode
The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
As shown in Figure 1, for a kind of flow of synthetic aperture radar detection method shown in one exemplary embodiment of the disclosure
Figure, this approach includes the following steps.
In step s 11, determine that search coverage, the search coverage include at least the region where target to be observed；
In step s 12, it determines that synthetic aperture radar scans the scanning times N of the search coverage, and determines that n times are swept
The observation angle scanned every time in retouching, N are the positive integer more than 1；
In step s 13, when the synthetic aperture radar passes through the search coverage, according to the scanning times and
The observation angle scanned every time is scanned the search coverage, obtains target image.
It should be understood that synthetic aperture radar can be airborne synthetic aperture radar, or satellite-borne synthetic aperture thunder
It reaches, in order to be better understood from the synthetic aperture radar detection method of disclosure offer, here by taking satellite-borne synthetic aperture radar as an example
To illustrate.
In the disclosure, target to be observed can have building block or complicated or blindage, such as higher building
Room, massif, seismic ruins etc..Target to be observed can also be the target with multiple scattering centers, as shown in Fig. 2, being this public affairs
Open the schematic diagram of the target to be observed comprising multiple scattering centers shown in an exemplary embodiment.The search coverage is at least
Including the region including the target to be observed.In one embodiment, search coverage is target region to be observed.
In another embodiment, search coverage be include target region to be observed, and be less than or equal at a distance from target to be observed
The regional extent of one pre-determined distance.
The determination of the search coverage can be that user chooses according to actual needs.For example, synthetic aperture radar
A width scan image is obtained first, which can be collected under the arbitrary operating mode of synthetic aperture radar
(such as：Strip-type operating mode, scan-type operating mode, bunching type pattern etc.), user determines on the scan image to be needed
By the search coverage of multi-angle observation.Referring to FIG. 3, for the search coverage schematic diagram shown in one exemplary embodiment of the disclosure.
In figure 3, target B is blocked by target A, can be the target to be observed by target B, and border circular areas where target B can be with
It is confirmed as search coverage.
In the disclosure, the scanning times N to the search coverage can be preset, for example, default scan number is 10
It is secondary.Scanning times N can also be automatically selected according to the range of search coverage, for example, when the range of search coverage is larger, scanning
Times N is also larger, and when the range of search coverage is smaller, scanning times N can suitably reduce.Certainly, scanning times N can be with root
It is determined according to other modes, the disclosure does not limit.It should be understood that in order to ensure the work effect of synthetic aperture radar
Rate can be defined scanning times, such as 5 ＜ N ＜ 15.
For synthetic aperture radar when carrying out n times scanning to search coverage, scanning every time has corresponding observation angle, n times
The observation angle of scanning can be set according to actual needs, and the observation angle of n times scanning may be the same or different.
In one embodiment, the observation angle of n times scanning is all different, and in each scanning, synthetic aperture radar is all to the spy
Wave beam of field emission is surveyed, and collects an echo, work n times in this way, can clap at angle from different directions
Take the photograph the image of search coverage.
After the observation angle that scanning times N is determined and scans every time, control satellite-borne synthetic aperture radar is to detection
Region is scanned, and the multi-faceted information of target to be observed can be obtained in the target image by obtaining target image.
In the disclosure, satellite-borne synthetic aperture radar can carry out search coverage when once by above search coverage
Repeatedly can intermittent, different observation angles scanning, obtain the multi-faceted information of search coverage, and synthesis hole in the related technology
Diameter radar can only realize that the single pass imaging to search coverage, scanning result are also one when once passing through search coverage
The imaging results of side.Therefore, the scheme in the disclosure, which can be realized, carries out search coverage comprehensive observation, improves synthesis
The detecting ability of aperture radar.
Optionally, the observation angle includes side view angle and angle of squint, the observation scanned every time in the determining n times scanning
Angle, including：
According to the relative position of the target to be observed and the running track of the synthetic aperture radar, the synthesis is determined
The beam center of aperture radar is irradiated to the side view angle of the target to be observed, wherein the side scanned every time in the n times scanning
Visual angle is identical；
According to the characterisitic parameter of the target to be observed, the angle of squint scanned every time in the n times scanning is determined.
As shown in figure 4, for the parameter schematic diagram of the satellite-borne synthetic aperture radar shown in one exemplary embodiment of the disclosure.Please
With reference to figure 4, the running track direction of satellite-borne synthetic aperture radar is orientation, and side view angle is that antenna look angle is projected in distance to flat
The angle in face, angle of squint are the angle that antenna look angle is projected in oblique distance plane.In this embodiment, observation angle includes side view angle
And angle of squint, for each scanning, side view angle is all identical, and angle of squint can be different.
It should be understood that the characterisitic parameter of target to be observed can be the ginsengs such as height, shape, the orientation of target to be observed
Number.In one embodiment, target to be observed is a massif, which is blocked by another massif, according to massif to be observed and conjunction
At the position relationship of aperture radar running track, side view angle is determined, which can ensure beam scanning to massif location
Domain.In addition, according to characterisitic parameters such as the height of massif to be observed, the faces that is blocked, the angle of squint scanned every time is adjusted, in a reality
It applies in example, at least ensures that the wave beam of synthetic aperture radar can scan primary occlusion face region.
Certainly, the side view angle scanned every time can also be adjusted according to actual needs, and the side view angle of n times scanning can also
Difference, the disclosure are not specifically limited.
Optionally, the characterisitic parameter according to the target to be observed, determine scanned every time in n times scanning it is oblique
Visual angle, including：According to the characterisitic parameter of the target to be observed, the angle of squint variation range of the synthetic aperture radar is determined；
The angle of squint variation range is divided into N equal portions, determines the angle of squint scanned every time.
It should be understood that when the side view angle all same that n times scan, according to the running track of synthetic aperture radar and side
Visual angle can determine an oblique distance plane, referring to FIG. 4, the angle of squint of synthetic aperture radar launching beam can be in oblique distance plane
On be adjusted.In one embodiment, when satellite-borne synthetic aperture radar is moved along running track, satellite-borne synthetic aperture radar
Position it is different, the angle of squint that can scan search coverage is also different, therefore, can be determined to scan in oblique distance plane
To the angle of squint variation range of search coverage.
In the disclosure, the angle of squint scanned every time can determine in several ways, as shown in figure 5, being the disclosure one
Angle of squint schematic diagram shown in exemplary embodiment, in this embodiment, it is first determined scanning times N, scanning times can be
It is pre-set, can also be the size according to search coverage range come selected.Angle of squint variation range is subjected to N etc.
Point, determine the angle of squint scanned every time.With angle of squint variation range for -30 °~60 °, for N is 9, by angle of squint variation range
Carrying out 9 deciles, then angle of squint is adjusted 10 ° by scanning every time, then when the initial angle of squint of synthetic aperture radar is -30 °, the
The angle of squint of single pass is adjusted to -20 °, and the angle of squint of second of scanning is adjusted to -10 °, the angle of squint tune of third time scanning
Whole is 0 °, and so on.In another embodiment, the angle of squint scanned every time can also be that can scan appointing for search coverage
One angle.
Optionally, it is described according to the scanning times and the observation angle scanned every time to the search coverage into
Row scanning obtains target image, including：Obtain N width scan image corresponding with n times scanning；The N width scan image is carried out
Image co-registration obtains the target image.
In the disclosure, satellite-borne synthetic aperture radar often carries out single pass, a width scan image is generated, in order to one
The multi-faceted information of search coverage and the information of surrounding objects are obtained in width image, it is reasonable to carry out N width scan images
Effective fusion, obtains the target image.In one embodiment, for corresponding target to be observed in different scanning image
The information such as scattering properties, the integration of multi-angle image can be carried out.The method of image co-registration can be set according to actual needs
It is fixed, such as weighted mean method, Wavelet Transform etc., the disclosure does not limit.
Optionally, after the acquisition target image, the method further includes：The target image is carried out at image
Reason；Target identification is carried out to the target image after image procossing, to detect the target to be observed.
It should be understood that for the target image after fusion more once shoots the image of formation, have that noise is big, splicing is wrong
The defects of position, it is therefore desirable to some post-processings, such as filtering, splicing correction etc. be carried out to target image, obtained by image
Treated target image, next, can to treated, target image carries out image interpretation and target identification, visited
Survey the information in region.
Optionally, the method further includes：When being scanned to the region to be scanned other than the search coverage, control
The synthetic aperture radar carries out single pass imaging to the region to be scanned.
In the disclosure, if all areas are required for taking multiple scan, satellite-borne synthetic aperture radar can be substantially reduced
Working efficiency therefore for guaranteed efficiency, the scanning of multi-angle can be used to search coverage, other regions are still used
Existing operating mode (such as strip-type operating mode, scan-type operating mode, bunching type pattern) carries out single pass imaging.
In order to be better understood from the synthetic aperture radar detection method of disclosure offer, as shown in fig. 6, showing for the disclosure one
Example property implements the flow chart of the synthetic aperture radar detection method exemplified, includes the following steps：
Step S61, determines search coverage；
Step S62 designs the operating mode of synthetic aperture radar；
Step S63, control synthetic aperture radar scan the search coverage under the operating mode, obtain several scannings
Image；
Step S64 carries out multi-angle image fusion to several described scan images, obtains blending image；
Step S65 carries out post-processing to the blending image, obtains treated blending image；
Step S66 carries out target identification to treated the blending image.
In this embodiment, the operating mode for designing synthetic aperture includes the scanning times for designing scanning probe region, with
And the side view angle scanned every time and angle of squint.
In the disclosure, when needing to take multiple scan search coverage, it is only necessary to adjust satellite-borne synthetic aperture radar day
The angle of squint of line launching beam, therefore new function need not be developed again, this is that current nearly all SAR satellites can be real
Existing, without emitting new satellite thus, there is very strong versatility.In addition, be blocked target or scattering properties complexity
Target be in actual observation it is very common, therefore the disclosure provide synthetic aperture radar detection method have it is very strong
Practicability.
As shown in fig. 7, for a kind of signal of synthetic aperture radar detection device shown in one exemplary embodiment of the disclosure
Figure, described device include：
Area determination module 71, for determining that search coverage, the search coverage include at least where target to be observed
Region；
Processing module 72, for determining that synthetic aperture radar scans the scanning times N of the search coverage, and determining N
The observation angle scanned every time in secondary scanning, N are the positive integer more than 1；
Image collection module 73, when the synthetic aperture radar passes through the search coverage, according to the scanning times
And the observation angle scanned every time is scanned the search coverage, obtains target image.
Optionally, the observation angle includes side view angle and angle of squint, processing module 72, including：
Side view angle determination sub-module, for according to the target to be observed and the running track of the synthetic aperture radar
Relative position determines that the beam center of the synthetic aperture radar is irradiated to the side view angle of the target to be observed, wherein described
The side view angle scanned every time in n times scanning is identical；
Angle of squint determination sub-module determines every in the n times scanning for the characterisitic parameter according to the target to be observed
The angle of squint of secondary scanning.
Optionally, the angle of squint determination sub-module, including：
First determination sub-module determines the synthetic aperture radar for the characterisitic parameter according to the target to be observed
Angle of squint variation range；
Second determination sub-module, for the angle of squint variation range to be divided into N equal portions, determine it is described scan every time it is oblique
Visual angle.
Optionally, image collection module 73, including：
First acquisition submodule, for obtaining N width scan image corresponding with n times scanning；
Second acquisition submodule obtains the target image for the N width scan image to be carried out image co-registration.
Optionally, described device further includes：
Image processing module, for carrying out image procossing to the target image；
Identification module, it is described to be observed to detect for carrying out target identification to the target image after image procossing
Target.
Optionally, described device further includes：
Control module, for when being scanned to the region to be scanned other than the search coverage, controlling the synthesis
Aperture radar carries out single pass imaging to the region to be scanned.
Based on same design, the disclosure also provides a kind of computer readable storage medium, is stored thereon with computer program
The step in the synthetic aperture radar detection method that the disclosure provides is realized in instruction when the program instruction is executed by processor.
Based on same design, the disclosure also provides a kind of synthetic aperture radar detection device, and described device includes：The disclosure
The computer readable storage medium of offer；And one or more processors, for executing the computer readable storage medium
In program.
The preferred embodiment of the disclosure is described in detail above in association with attached drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (9)
1. a kind of synthetic aperture radar detection method, which is characterized in that the method includes：
Determine that search coverage, the search coverage include at least the region where target to be observed；
It determines that synthetic aperture radar scans the scanning times N of the search coverage, and determines the sight scanned every time in n times scanning
Measuring angle, N are the positive integer more than 1；
When the synthetic aperture radar passes through the search coverage, according to the scanning times and the sight scanned every time
Measuring angle is scanned the search coverage, obtains target image.
2. synthetic aperture radar detection method according to claim 1, which is characterized in that the observation angle includes side view
Angle and angle of squint, the observation angle scanned every time in the determining n times scanning, including：
According to the relative position of the target to be observed and the running track of the synthetic aperture radar, the synthetic aperture is determined
The beam center of radar is irradiated to the side view angle of the target to be observed, wherein the side view angle scanned every time in the n times scanning
It is identical；
According to the characterisitic parameter of the target to be observed, the angle of squint scanned every time in the n times scanning is determined.
3. synthetic aperture radar detection method according to claim 2, which is characterized in that described according to the mesh to be observed
Target characterisitic parameter determines the angle of squint scanned every time in the n times scanning, including：
According to the characterisitic parameter of the target to be observed, the angle of squint variation range of the synthetic aperture radar is determined；
The angle of squint variation range is divided into N equal portions, determines the angle of squint scanned every time.
4. synthetic aperture radar detection method according to claim 1, which is characterized in that described according to the scanning times
And the observation angle scanned every time is scanned the search coverage, obtains target image, including：
Obtain N width scan image corresponding with n times scanning；
The N width scan image is subjected to image co-registration, obtains the target image.
5. synthetic aperture radar detection method according to claim 1, which is characterized in that the acquisition target image it
Afterwards, the method further includes：
Image procossing is carried out to the target image；
Target identification is carried out to the target image after image procossing, to detect the target to be observed.
6. synthetic aperture radar detection method according to claim 1, which is characterized in that the method further includes：
When being scanned to the region to be scanned other than the search coverage, controls the synthetic aperture radar and wait sweeping to described
It retouches region and carries out single pass imaging.
7. a kind of synthetic aperture radar detection device, which is characterized in that described device includes：
Area determination module, for determining that search coverage, the search coverage include at least the region where target to be observed；
Processing module, for determining that synthetic aperture radar scans the scanning times N of the search coverage, and determining n times scanning
In the observation angle that scans every time, N is the positive integer more than 1；
Image collection module, when the synthetic aperture radar passes through the search coverage, according to the scanning times and institute
It states the observation angle scanned every time to be scanned the search coverage, obtains target image.
8. a kind of computer readable storage medium, is stored thereon with computer program instructions, which is characterized in that the program instruction quilt
The step of any one of claim 1-6 the methods are realized when processor executes.
9. a kind of synthetic aperture radar detection device, which is characterized in that described device includes：Calculating described in claim 8
Machine readable storage medium storing program for executing；And
One or more processors, for executing the program in the computer readable storage medium.
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| CN111521988A (en) * | 2019-02-01 | 2020-08-11 | 比亚迪股份有限公司 | Radar angle measurement method and device based on beam forming, radar and vehicle |
| CN111521988B (en) * | 2019-02-01 | 2023-11-14 | 比亚迪股份有限公司 | Radar angle measurement method and device based on beam forming, radar and vehicle |
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