Information processing device, information processing method, and information processing program

Abstract

To improve the accuracy of time-series interference analysis with an SAR image by utilizing meta information in parameter setting related to filter processing in time-series interference analysis with an SAR image and a technique for selecting an SAR image on the basis of meta information.SOLUTION: An information processing device 100 implementing time-series interference analysis comprises a candidate selection unit 140 and a processing parameter setting unit 130. The candidate selection unit 140 selects one or more image pairs used in time-series interference analysis from a plurality of image pairs generated on the basis of a time-series radar image on the basis of meta information indicative of a state influencing the accuracy of time-series interference analysis. The processing parameter setting unit 130 sets processing parameters used in filter processing for each radar image included in each of the selected image pairs on the basis of meta information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an information processing device, an information processing method, and an information processing program. [Background technology]

[0002] In SAR, a flying object irradiates microwaves onto the ground while moving, receives the echoes reflected from the ground, and generates SAR images by signal processing the received echoes. Radar images obtained by SAR have amplitude and phase in each pixel. SAR is a synthetic radar. It is an abbreviation for Aperture Radar. In SAR, by artificially synthesizing an aperture, it is possible to obtain radar images equivalent to those obtained using an antenna with a large aperture.

[0003] In recent years, time-series interferometry analysis has been conducted using multiple radar images obtained by SAR at different observation times. By conducting time-series interferometry analysis, minute relative displacements of the earth's surface can be measured. As a specific example, by conducting time-series interferometry analysis using data sets observed on different observation dates using satellite SAR, it is possible to measure ground subsidence caused by construction work or slope deformation caused by landslides.

[0004] In the multiple radar images used in the time-series interference analysis, the conditions at the time of observation of the SAR satellite data are different for each radar image. Therefore, the variation in phase difference or coherence is different for each image pair of radar images used in the time-series interference analysis. Specific examples of conditions at the time of observation of the SAR satellite data include differences in weather, ionospheric conditions, and land cover conditions. Generally, the results of time-series interference analysis depend on the quality of the interference analysis results input into the process. Therefore, if there is a large variation in phase difference or coherence, the quality of the results of time-series interference analysis also decreases. Therefore, it was necessary to visually check the interference analysis results and manually remove those with large variations in phase or coherence. With such visual checks, the judgment criteria depended on the operator, which posed an issue of unstable quality. Another issue was that it was difficult to automate the system when expanding the scope of application of time-series interference analysis. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-205146 A Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Document 1 discloses a technique for selecting radar images based on meta-information such as rainfall in time-series interference analysis using SAR images. However, according to the technology disclosed in Patent Document 1, even usable radar images are excluded depending on the parameter adjustment of the time-series interference analysis, so there is a problem that a sufficient amount of data cannot be secured depending on the conditions indicated by the meta-information corresponding to the radar images used in the time-series interference analysis. The present disclosure aims to improve the accuracy of time-series interference analysis using SAR images by utilizing meta-information in setting parameters related to filter processing in time-series interference analysis using SAR images and in technology for selecting SAR images based on meta-information. [Means for solving the problem]

[0007] The information processing device according to the present disclosure includes: An information processing device for performing time series interference analysis, a candidate selection unit that selects one or more image pairs as elements of a selected image pair group consisting of candidates for image pairs to be used in the time series interference analysis, based on meta information that is information indicating a situation at the time when each radar image of the time series radar image was captured, the meta information being information indicating a situation that may affect the accuracy of the time series interference analysis, from a plurality of image pairs generated based on a time series radar image consisting of a plurality of radar images captured at different times from each other; a processing parameter setting unit that sets processing parameters to be used in a filter process for each radar image included in each image pair included in the selected image pair group based on the meta information; Equipped with. Effect of the Invention

[0008] The information processing device according to the present disclosure performs a time series interference analysis. Here, the time series interference analysis may be a time series interference analysis using SAR images. Also, in the present disclosure, the candidate selection unit selects one or more image pairs based on meta information. The processing parameter setting unit sets processing parameters used in the filter processing based on the meta information. By performing the filter processing using the set processing parameters, the amount of usable radar images increases. Therefore, according to the present disclosure, in the time series interference analysis using SAR images and the technology for selecting SAR images based on meta information, the accuracy of the time series interference analysis using SAR images can be improved by utilizing meta information in setting parameters related to the filter processing. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing an example of the configuration of an information processing device 100 according to a first embodiment. [Diagram 2] 1 is a diagram showing an example of a hardware configuration of an information processing device 100 according to a first embodiment. [Diagram 3] 4 is a flowchart showing the operation of the information processing device 100 according to the first embodiment. [Figure 4]4 is a diagram for explaining the processing of a processing parameter setting unit 130 and a candidate selecting unit 140 according to the first embodiment. [Diagram 5] FIG. 13 is a diagram showing an example of a hardware configuration of an information processing device 100 according to a modification of the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In the description of the embodiments and the drawings, the same elements and corresponding elements are given the same reference numerals. Descriptions of elements given the same reference numerals are omitted or simplified as appropriate. Arrows in the drawings primarily indicate data flow or processing flow. In addition, "part" may be read as "circuit," "step," "procedure," "processing," or "circuitry" as appropriate.

[0011] Embodiment 1 Hereinafter, the present embodiment will be described in detail with reference to the drawings.

[0012] ***Configuration Description*** Fig. 1 shows an example of the configuration of an information processing device 100 according to this embodiment. As shown in Fig. 1, the information processing device 100 includes an image pair generation unit 110, a meta information analysis unit 120, a processing parameter setting unit 130, a candidate selection unit 140, and a time-series interference analysis unit 150. The information processing device 100 is a device that performs time-series interference analysis, and in order to improve the accuracy of the time-series interference analysis using Synthetic Aperture Radar (SAR) images, removes pairs with reduced accuracy by utilizing meta-information. The information processing device 100 automatically sets processing parameters corresponding to the radar image and removes the scene based on meta-information in addition to image information of the time-series radar image.

[0013] The image pair generator 110 receives a radar image DIN1 from an external source, and generates a plurality of image pairs using the received radar image DIN1. An image pair is made up of two radar images. The radar images are typically SAR images. The image pair generator 110 may generate image pairs in any manner. The radar image DIN1 is data representing a time-series radar image. A time-series radar image is made up of a plurality of radar images taken at different times. The radar image DIN1 may be made up of radar images observed at a plurality of time periods.

[0014] The meta information analysis unit 120 receives meta information DIN2 from an external source and analyzes the received meta information DIN2. The meta information DIN2 is information related to each radar image, other than the information of each radar image itself, and is information indicating the situation at the time when each radar image was captured, and is information indicating the situation that may affect the accuracy of the time series interference analysis. As a specific example, the meta information DIN2 is information indicating at least one of the weather conditions on the observation date, the ionospheric conditions on the observation date, the date and time when each radar image was captured, and the position of the satellite that captured each radar image at the time when each radar image was captured. The observation date is the date when the radar image was captured.

[0015] The processing parameter setting unit 130 sets processing parameters based on the meta information analyzed by the meta information analysis unit 120. Setting of processing parameters also means adjustment of processing parameters. The processing parameters are parameters used in filter processing of each radar image included in each image pair included in the selected image pair group. The processing parameter setting unit 130 may change the processing parameters of the image pair based on the meta information. The meta information is information indicating the situation at the time when each radar image of the time series radar image was captured, and is information indicating the situation that may affect the accuracy of the time series interference analysis. The processing parameter setting unit 130 may set processing parameters corresponding to each radar image included in the target image pair based on the distance between the positions of the satellites that captured each radar image included in the target image pair at the time when each radar image included in the target image pair was captured. The target image pair is each image pair included in the selected image pair group. The processing parameter setting unit 130 may determine whether or not to set processing parameters corresponding to the target image based on meta information corresponding to the target image and an exclusion threshold corresponding to the target image. The target image is either one of the image pairs included in the selected image pair group and each radar image included in each image pair included in the selected image pair group. The exclusion threshold corresponding to the target image is a threshold corresponding to the meta information corresponding to the target image, and is a threshold used to exclude the target image from the target of the time-series interference analysis. When the target image is an image pair, the processing parameter setting unit 130 performs a judgment on each image included in the image pair. Note that the exclusion threshold may be determined in any manner. The processing parameter setting unit 130 may set processing parameters based on the image pairs generated by the image pair generation unit 110. That is, the processing parameter setting unit 130 may set processing parameters corresponding to each radar image included in each image pair based on each image pair included in the selected image pair group.

[0016] The candidate selection unit 140 selects candidates for image pairs to be used in time-series interference analysis from among the multiple image pairs generated by the image pair generation unit 110, based on the meta-information analyzed by the meta-information analysis unit 120. That is, the candidate selection unit 140 selects one or more image pairs from the multiple image pairs as elements of a selected image pair group, based on the meta-information. The selected image pair group consists of candidates for image pairs to be used in time-series interference analysis. The candidate selection unit 140 is also called a time-series interference analysis candidate selection unit. The multiple image pairs are generated based on time-series radar images. The image pairs excluded by the candidate selection unit 140 are image pairs that will lead to a decrease in the accuracy of the time-series interference analysis.

[0017] The time-series interference analysis unit 150 executes a time-series interference analysis using the image pairs selected by the candidate selection unit 140, and outputs a displacement amount analysis result DOUT based on the execution result. The displacement amount analysis result DOUT is data indicating the execution result of the time-series interference analysis.

[0018] 2 shows an example of a hardware configuration of the information processing device 100 according to this embodiment. The information processing device 100 is made up of a computer. The information processing device 100 may be made up of multiple computers.

[0019] As shown in the figure, the information processing device 100 is a computer including hardware such as a processor 11, a memory 12, an auxiliary storage device 13, an input / output IF (Interface) 14, and a communication device 15. These pieces of hardware are appropriately connected via signal lines 19.

[0020] The processor 11 is an integrated circuit (IC) that performs arithmetic processing and controls the hardware of the computer. Specific examples of the processor 11 include a central processing unit (CPU), a digital signal processor (DSP), and a graphics processing unit (GPU). The information processing device 100 may include a plurality of processors that replace the processor 11. The plurality of processors share the role of the processor 11.

[0021] The memory 12 is typically a volatile storage device, and a specific example is a RAM (Random Access Memory). The memory 12 is also called a primary storage device or a main memory. Data stored in the memory 12 is saved in the auxiliary storage device 13 as necessary.

[0022] The auxiliary storage device 13 is typically a non-volatile storage device, and specific examples thereof include a ROM (Read Only Memory), an HDD (Hard Disk Drive), or a flash memory. Data stored in the auxiliary storage device 13 is loaded into the memory 12 as necessary. The memory 12 and the auxiliary storage device 13 may be integrated into one unit.

[0023] The input / output IF 14 is a port to which an input device and an output device are connected. A specific example of the input / output IF 14 is a Universal Serial Bus (USB) terminal. Specific examples of the input device are a keyboard and a mouse. A specific example of the output device is a display.

[0024] The communication device 15 is a receiver and a transmitter, and is, for example, a communication chip or a network interface card (NIC).

[0025] Each unit of the information processing device 100 may use the input / output IF 14 and the communication device 15 as appropriate when communicating with other devices.

[0026] The auxiliary storage device 13 stores an information processing program. The information processing program is a program that causes a computer to realize the functions of each unit of the information processing device 100. The information processing program is loaded into the memory 12 and executed by the processor 11. The functions of each unit of the information processing device 100 are realized by software.

[0027] Data used when executing the information processing program and data obtained by executing the information processing program are appropriately stored in the storage device. Each part of the information processing device 100 appropriately uses the storage device. As a specific example, the storage device is composed of at least one of the memory 12, the auxiliary storage device 13, a register in the processor 11, and a cache memory in the processor 11. Note that the terms "data" and "information" may have the same meaning. The storage device may be independent of the computer. The functions of the memory 12 and the auxiliary storage device 13 may be realized by other storage devices.

[0028] The information processing program may be recorded in a computer-readable non-volatile recording medium. Specific examples of the non-volatile recording medium include an optical disk and a flash memory. The information processing program may be provided as a program product.

[0029] ***Explanation of Operation*** The operation procedure of the information processing device 100 corresponds to an information processing method, and the program that realizes the operation of the information processing device 100 corresponds to an information processing program.

[0030] 3 is a flowchart showing an example of the operation of the information processing device 100. The operation of the information processing device 100 will be described with reference to FIG.

[0031] (Step S101) The image pair generator 110 receives a radar image DIN1 from an external source, and generates an image pair using the received radar image DIN1.

[0032] (Step S102) The meta information analysis unit 120 receives meta information DIN2 from an external source and analyzes the received meta information DIN2.

[0033] (Step S103) The processing parameter setting section 130 sets processing parameters based on the meta information analyzed by the meta information analysis section 120 . The processing parameter setting unit 130 adjusts the strength or number of applications of various filter processes, etc., based on information indicating the weather conditions at the time when each radar image was captured, the ionospheric conditions at the time when each radar image was captured, and the satellite position distance corresponding to each image pair, as a specific example. Specific examples of the various filter processes are processes using speckle noise reduction technology or processes using a phase emphasis filter. The satellite position distance corresponding to the target image pair is the distance between the positions of the satellites that captured each radar image at the time when each radar image included in the target image pair was captured. The number of satellites that captured each radar image included in the target image pair may be one or two. As a specific example, when meta information corresponding to a certain image pair satisfies a condition that is considered to increase noise components in a radar image, the processing parameter setting unit 130 sets the strength of the filter processing corresponding to the certain image pair to a high value, or adjusts the number of times that the filter processing corresponding to the certain image pair is applied to be increased. At this time, the processing parameter setting unit 130 may adjust each parameter value according to the degree to which the noise components are considered to increase.

[0034] (Step S104) The candidate selection unit 140 selects candidates for image pairs to be used in the time-series interference analysis from among the image pairs generated by the image pair generation unit 110. A specific example of the operation of the candidate selection unit 140 will be described below.

[0035] (Example 1) The candidate selection unit 140 excludes radar images in which the amount of rainfall at the time of capture was equal to or greater than a certain level, based on the weather conditions indicated by the corresponding meta information. As a specific example, the weather conditions indicate the amount of rainfall that is uniquely determined for each radar image. The candidate selection unit 140 excludes image pairs including each excluded radar image from the targets of the time-series interference analysis.

[0036] (Example 2) The candidate selection unit 140 analyzes the state of the ionosphere based on the meta-information, and excludes radar images captured in scenes corresponding to ionosphere conditions that are considered to cause significant phase interference to the radar.

[0037] (Example 3) When each image pair is set as a target image pair, the candidate selection unit 140 analyzes the satellite position distance corresponding to the target image pair based on the meta information included in each radar image included in the target image pair, and excludes the target image pair if the satellite position distance corresponding to the target image pair is longer than a certain level, or if the satellite position distance corresponding to the target image pair is shorter than a certain level. Here, if the satellite position distance corresponding to the target image pair is long, the coherence of the target image pair decreases, so the target image pair is excluded. Also, if the satellite position distance corresponding to the target image pair is short, the phase variation between the noises corresponding to the target image pair decreases, so the noise coherence increases and the coherence of the target image pair decreases relatively. Therefore, the target image pair is excluded.

[0038] The candidate selector 140 uses meta information corresponding to a single radar image in examples 1 and 2, and uses meta information corresponding to an image pair in example 3. In addition, the exclusion threshold used by the candidate selection unit 140 may be a threshold determined in consideration of the observation angle of the satellite, etc., and may be an acceptable SA (Signal Error). A threshold is used to select image pairs consisting of image data having a ratio of ambiguity to noise.

[0039] FIG. 4 is a diagram for explaining the processing of the processing parameter setting unit 130 and the candidate selection unit 140. As shown in FIG. In the table shown in FIG. 4, the "Interference" column indicates the interference in the time series interference analysis. In the table shown in FIG. 4, the "Measures" column indicates measures taken for the radar image. Specifically, if a value corresponding to a certain piece of meta information is within a range corresponding to "good interference," processing based on default settings is performed on the radar image corresponding to the certain piece of meta information. "As is" means that the default settings are not changed. If a value corresponding to a certain piece of meta information is within a range corresponding to "poor interference," the radar image corresponding to the certain piece of meta information is excluded from the target of the time-series interference analysis, or the processing parameters corresponding to the radar image corresponding to the certain piece of meta information are adjusted according to the value. Note that if a value corresponding to a certain piece of meta information does not satisfy the exclusion threshold but is close to the exclusion threshold, the radar image corresponding to the certain piece of meta information is corrected by filter processing using the processing parameters adjusted based on the certain piece of meta information. This makes it possible to increase the number of radar images used in the time-series interference analysis. A specific example of processing based on meta information will be described below. Note that the specific range of each value range may be determined in any way. When the amount of rainfall in the shooting range of the target image at the shooting time corresponding to the target image is large, the coherence deteriorates, and when the amount of rainfall is small, the coherence is good. Therefore, when the amount of rainfall in the shooting range of the target image at the shooting time corresponding to the target image is equal to or greater than a certain value, the target image is excluded from the target of the time-series coherence analysis, and when the amount of rainfall is large but less than a certain value, the processing parameters corresponding to the target image are adjusted. The target image is a radar image. When the ionosphere is disturbed in the shooting range of the target image at the shooting time corresponding to the target image, the coherence is degraded, and when the ionosphere is not disturbed, the coherence is good. Therefore, when the degree of disturbance of the ionosphere in the shooting range of the target image at the shooting time corresponding to the target image is equal to or greater than a certain value, the target image is excluded from the target of the time-series interference analysis, and when the ionosphere is disturbed but the degree of disturbance of the ionosphere is less than a certain value, the processing parameters corresponding to the target image are adjusted. When the distance between the satellite positions corresponding to the target image pair is too small or too large, the coherence deteriorates, and when the distance between the satellite positions is average, the coherence is good. Therefore, when the distance between the satellite positions corresponding to the target image pair is equal to or smaller than a certain value or equal to or larger than a certain value, the target image pair is excluded from the target of the time-series interference analysis. In addition, when the distance between the satellite positions is small but larger than a certain value, or when the distance between the satellite positions is large but smaller than a certain value, the processing parameters corresponding to each radar image included in the target image pair are adjusted.

[0040] (Step S105) The time-series interference analysis unit 150 executes a time-series interference analysis using the image pairs selected by the candidate selection unit 140 .

[0041] ***Explanation of the Effects of the First Embodiment*** Conventionally, parameter adjustment and image selection for improving the accuracy of time-series interference analysis have been performed based on image features of radar images. In the image feature-based method, it is necessary to visually check dozens to hundreds of image pairs, and to manually change parameters and remove scenes. Here, when the number of input time-series radar images increases, the number of image pairs to be confirmed increases exponentially, and the human cost of confirmation becomes an issue. In addition, in the conventional technology, a time-series interference analysis is performed once, the results are visually interpreted, and processing parameters are set and scenes are excluded based on the results. On the other hand, according to the present embodiment, by utilizing meta-information before executing the time-series interference analysis, it is possible to automatically exclude pairs that lead to a decrease in accuracy and to automatically set appropriate parameters. Therefore, according to the present embodiment, it is possible to achieve a reduction in time and an improvement in accuracy in the time-series interference analysis.

[0042] ***Other configurations*** <Variation 1> FIG. 5 shows an example of the hardware configuration of an information processing device 100 according to this modification. The information processing device 100 includes a processing circuit 18 in place of the processor 11 , the processor 11 and the memory 12 , the processor 11 and the auxiliary storage device 13 , or the processor 11 , the memory 12 , and the auxiliary storage device 13 . The processing circuitry 18 is hardware that realizes at least a part of each unit included in the information processing device 100. The processing circuitry 18 may be dedicated hardware, or may be a processor that executes programs stored in the memory 12 .

[0043] When processing circuitry 18 is dedicated hardware, processing circuitry 18 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The information processing device 100 may include a plurality of processing circuits that replace the processing circuit 18. The plurality of processing circuits share the role of the processing circuit 18.

[0044] In the information processing device 100, some of the functions may be realized by dedicated hardware, and the remaining functions may be realized by software or firmware.

[0045] Processing circuitry 18 is illustratively implemented in hardware, software, firmware, or a combination thereof. The processor 11, memory 12, auxiliary storage device 13, and processing circuit 18 are collectively referred to as “processing circuitry.” In other words, the functions of the functional components of the information processing device 100 are realized by the processing circuitry. The information processing device 100 according to other embodiments may have a similar configuration to this modified example.

[0046] ***Other embodiments*** Although the first embodiment has been described, it is possible to combine a plurality of parts of the present embodiment. Alternatively, it is possible to partially implement the present embodiment. In addition, the present embodiment may be modified in various ways as necessary, and may be implemented in any combination, either as a whole or in part. The above-described embodiment is essentially a preferred example, and is not intended to limit the scope of the present disclosure, its applications, and uses. The procedures described using the flowcharts and the like may be appropriately modified or may be executed in parallel.

[0047] Various aspects of the present disclosure are summarized below as appendices.

[0048] (Appendix 1) An information processing device for performing time series interference analysis, a candidate selection unit that selects one or more image pairs as elements of a selected image pair group consisting of candidates for image pairs to be used in the time series interference analysis, based on meta information that is information indicating a situation at the time when each radar image of the time series radar image was captured, the meta information being information indicating a situation that may affect the accuracy of the time series interference analysis, from a plurality of image pairs generated based on a time series radar image consisting of a plurality of radar images captured at different times from each other; a processing parameter setting unit that sets processing parameters to be used in a filter process for each radar image included in each image pair included in the selected image pair group based on the meta information; An information processing device comprising:

[0049] (Appendix 2) 2. The information processing device according to claim 1, wherein each radar image of the time-series radar image is a Synthetic Aperture Radar (SAR) image.

[0050] (Appendix 3) The information processing device according to claim 1 or 2, wherein the processing parameter setting unit sets processing parameters corresponding to each radar image included in each image pair based on each image pair included in the selected image pair group.

[0051] (Appendix 4) The information processing device of any one of Appendices 1 to 3, wherein the processing parameter setting unit, when each image pair included in the selected image pair group is set as a target image pair, sets processing parameters corresponding to each radar image included in the target image pair based on the distance between the positions of the satellites that captured each radar image included in the target image pair at the time when each radar image included in the target image pair was captured.

[0052] (Appendix 5) The information processing device of any one of Appendices 1 to 4, wherein the processing parameter setting unit, when a target image is either one of the image pairs included in the selected image pair group and each radar image included in each image pair included in the selected image pair group, determines whether or not to set processing parameters corresponding to the target image based on meta information corresponding to the target image and an exclusion threshold that is a threshold corresponding to the meta information corresponding to the target image and is used to exclude the target image from the target of the time series interference analysis. [Explanation of symbols]

[0053] 11 processor, 12 memory, 13 auxiliary storage device, 14 input / output IF, 15 communication device, 18 processing circuit, 19 signal line, 100 information processing device, 110 image pair generation unit, 120 meta information analysis unit, 130 processing parameter setting unit, 140 candidate selection unit, 150 time series interference analysis unit, DIN1 radar image, DIN2 meta information, DOUT displacement amount analysis result.

Claims

1. An information processing device for performing a time series interference analysis, a candidate selection unit that selects one or more image pairs as elements of a selected image pair group consisting of candidates for image pairs to be used in the time series interference analysis based on meta information, which is information indicating a situation at the time when each radar image of the time series radar image was captured, from a plurality of image pairs generated based on a plurality of radar images captured at different times from each other, and which is information indicating a situation that may affect the accuracy of the time series interference analysis; and a processing parameter setting unit that sets processing parameters to be used in a filter process for each radar image included in each image pair included in the selected image pair group based on the meta information; An information processing device comprising:

2. The information processing apparatus according to claim 1 , wherein each radar image of the time-series radar image is a Synthetic Aperture Radar (SAR) image.

3. The information processing apparatus according to claim 1 , wherein the processing parameter setting unit sets processing parameters corresponding to each radar image included in each image pair based on each image pair included in the selected image pair group.

4. The information processing device according to claim 1 or 2, wherein the processing parameter setting unit, when each image pair included in the selected image pair group is set as a target image pair, sets processing parameters corresponding to each radar image included in the target image pair based on the distance between the positions of the satellites that captured each radar image included in the target image pair at the time when each radar image included in the target image pair was captured.

5. The information processing device according to claim 1 or 2, wherein when a target image is either one of the image pairs included in the selected image pair group and each radar image included in each image pair included in the selected image pair group, the processing parameter setting unit determines whether or not to set processing parameters corresponding to the target image based on meta information corresponding to the target image and an exclusion threshold, which is a threshold corresponding to the meta information corresponding to the target image and is used to exclude the target image from the target of the time series interference analysis.

6. An information processing method executed by an information processing device that is a computer that performs time-series interference analysis, the information processing device selects one or more image pairs as elements of a selected image pair group consisting of candidates for image pairs to be used in the time series interference analysis, based on meta information, the meta information being information indicating a situation at the time when each radar image of the time series radar image was captured, from a plurality of image pairs generated based on a plurality of radar images captured at different times, the situation indicating a situation that may affect the accuracy of the time series interference analysis; An information processing method in which the information processing device sets processing parameters used in filter processing of each radar image included in each image pair included in the selected image pair group based on the meta information.

7. An information processing program executed by an information processing device that is a computer that performs time-series interference analysis, a candidate selection process for selecting one or more image pairs as elements of a selected image pair group consisting of candidates for image pairs to be used in the time series interference analysis, based on meta information that is information indicating a situation at the time when each radar image of the time series radar image was captured, the meta information being information indicating a situation that may affect the accuracy of the time series interference analysis, from a plurality of image pairs generated based on a time series radar image consisting of a plurality of radar images captured at different times from each other; a processing parameter setting process for setting processing parameters to be used in a filter process for each radar image included in each image pair included in the selected image pair group based on the meta information; An information processing program that causes the information processing device to execute the above.

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