SYNTHETIC APERTURE RADAR SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

    公开(公告)号:US20220221577A1

    公开(公告)日:2022-07-14

    申请号:US17613210

    申请日:2019-05-29

    Abstract: The signal processing device includes an interference processing unit which generates an interferogram from a plurality of SAR images, a coherence calculation unit which calculates coherence of the SAR images, a singular point processing unit which performs an operation for resolving singular points in the interferogram, a phase unwrapping unit which executes a phase unwrapping process using operation result of the singular point processing unit, and an SBAS analysis unit which performs displacement analysis by SBAS, using processing result of the phase unwrapping unit.

    IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, AND IMAGE PROCESSING SYSTEM

    公开(公告)号:US20210181336A1

    公开(公告)日:2021-06-17

    申请号:US16759887

    申请日:2018-10-04

    Abstract: Persistent scatterers on images and a target object are readily associated with each other. There is provided an image processing apparatus including a persistent scatterer specifier, a phase acquirer, and a clustering unit. The persistent scatterer specifier of the image processing apparatus specifies persistent scatterers at which reflection is stable in a plurality of images. The phase acquirer of the image processing apparatus acquires phases of the specified persistent scatterers. The clustering unit of the image processing apparatus clusters the persistent scatterers based on the positions of the persistent scatterers and the phases.

    SYNTHETIC APERTURE RADAR SIGNAL PROCESSING DEVICE AND METHOD

    公开(公告)号:US20210072376A1

    公开(公告)日:2021-03-11

    申请号:US16771450

    申请日:2018-10-10

    Abstract: A synthetic aperture radar signal processing device 10 includes a persistent scatterer extraction unit 11 which extracts, from time-series observation data related to an observation target observed from a plurality of observation directions by a radar, a plurality of persistent scatterers in respective observation directions; a persistent scatterer grouping unit 12 which groups the plurality of persistent scatterers in each of the observation directions; a group selection unit 13 which selects, in each of the observation directions, a persistent scatterer group that includes the persistent scatterers included in an analysis target from among groups generated by grouping; and a displacement speed processing unit 14 which synthesize displacement speeds of the selected persistent scatterer groups.

    IMAGE ANALYZING DEVICE AND IMAGE ANALYZING METHOD

    公开(公告)号:US20230133736A1

    公开(公告)日:2023-05-04

    申请号:US17912165

    申请日:2020-03-24

    Abstract: The image analyzing device includes an inter-image phase difference calculation unit 12 calculating a phase difference image of a pair of images, an inter-pixel phase difference calculation unit 13 calculating a phase difference between close pixels in the phase difference image, an evaluation function generation unit 14 generating an evaluation function that includes at least the phase difference between pixels, an optimization unit 15 optimizing the evaluation function for each pair of pixels or each pair of close pixels, a random number generation unit 21 generating a random number, a threshold setting unit 22 setting a threshold based on a result of evaluation of the random number using the evaluation function, and a merging unit 17 obtaining merged data of an entire image by merging values of variables when the optimization unit 15 performs optimization except for variables for which evaluation value using the evaluation function is below the threshold.

    SAR IMAGE ANALYSIS SYSTEM, IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM

    公开(公告)号:US20200348411A1

    公开(公告)日:2020-11-05

    申请号:US16767805

    申请日:2017-12-01

    Abstract: This invention is directed to an image processing apparatus that generates an evaluation index of a persistent scatterer likelihood without any influence of a large phase change with respect to a target whose displacement is nonlinear, a target whose elevation is high, or a target whose displacement is large. The image processing apparatus includes a phase array accumulator that accumulates phase arrays of respective pixels over a plurality of images, a clustering unit that classifies the respective pixels into a plurality of clusters based on the phase arrays, and a phase correlation calculator that calculates a correlation between a phase change in each of the plurality of clusters and the phase array at the respective pixels.

    METHOD FOR REMOVING INTER-RADAR INTERFERENCE, SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND SIGNAL PROCESSING PROGRAM

    公开(公告)号:US20190353768A1

    公开(公告)日:2019-11-21

    申请号:US16472940

    申请日:2016-12-26

    Abstract: The present invention is a signal processing device that efficiently removes multiple types of interference waves mixed in with a received signal. This signal processing device is provided with: a first extraction unit that performs deconvolution with respect to a cross-correlation of a reference signal and a received signal and to an autocorrelation of the reference signal, and extracts a channel response to the reference signal; a second extraction unit that extracts a main channel response corresponding to the reference signal from the channel response; and a removal unit that restores a signal by performing convolution with respect to the reference signal and the main channel response, and removes the restored signal from the received signal.

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