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11.发明授权公开(公告)号：US11933885B2
公开(公告)日：2024-03-19
申请号：US16972155
申请日：2018-06-06
Applicant: NEC Corporation
Inventor： Kazumine Ogura , Masayuki Ariyoshi , Yuzo Senda , Osamu Hoshuyama , Taichi Tanaka , Daisuke Ikefuji , Shingo Yamanouchi
CPC classification number: G01S13/9064 , G01S7/04 , G01S13/32 , G01S13/867
Abstract: A radar signal imaging device 30 includes: a transmission unit 31 which transmits a radar signal toward an object to be imaged that is a non-rigid body; a position estimation unit 32 which estimates the position of the object; an oscillation degree estimation unit 33 which estimates an oscillation degree which is a degree of change within a predetermined period in the relative positions of feature points constituting the object; and a synthetic aperture processing unit 34 which performs synthetic aperture processing on the radar signal reflected by the object on the basis of the estimated position of the object and the estimated oscillation degree.
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Patent Agency Ranking
公开(公告)号：US11662459B2
公开(公告)日：2023-05-30
申请号：US16625154
申请日：2017-06-23
Applicant: NEC Corporation
Inventor： Daisuke Ikefuji , Osamu Hoshuyama
IPC: G01S13/90
CPC classification number: G01S13/9019 , G01S13/90
Abstract: A synthetic-aperture-radar-signal processing device includes a range bin selection unit which selects, from an observed image, range bins including a signal from an isolated reflection point, a phase evaluation unit which evaluates phases in an azimuth direction in the range bins, a window function multiplication unit which designs a window function on the basis of results of the evaluation by the phase evaluation unit and multiply the range bins by the window function, and a phase error correction unit which corrects the observed image by estimating a phase error from the range bins multiplied by the window function.
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公开(公告)号：US12085666B2
公开(公告)日：2024-09-10
申请号：US17622300
申请日：2019-06-28
Applicant: NEC Corporation
Inventor： Tatsuya Sumiya , Masayuki Ariyoshi , Kazurnine Ogura , Taichi Tanaka , Daisuke Ikefuji
Abstract: The radar device 10 includes radar signal transmission and receiving means 11 for obtaining radar signals, based on reflected waves received by a plurality of receiving antennas, movement estimation means 12 for estimating a movement of an object that may appear in a radar image, movement discretization means 13 for discretizing the estimated movement, signal dividing means 14 for dividing the radar signals into a plurality of groups, Fourier transform processing means 15 for applying Fourier transform to the radar signals of each of the groups, phase-compensation and synthesis processing means 16 for synthesizing results of the Fourier transform after performing phase compensation corresponding to the movement of the object on the results of the Fourier transform, and imaging processing means 17 for generating the radar image from the synthesized result of the Fourier transform.
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公开(公告)号：US11841422B2
公开(公告)日：2023-12-12
申请号：US17613210
申请日：2019-05-29
Applicant: NEC Corporation
Inventor： Daisuke Ikefuji , Taichi Tanaka , Osamu Hoshuyama
IPC: G01S13/90
CPC classification number: G01S13/9023 , G01S13/904 , G01S13/9011
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.
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公开(公告)号：US11841421B2
公开(公告)日：2023-12-12
申请号：US17053211
申请日：2018-05-08
Applicant: NEC Corporation
Inventor： Taichi Tanaka , Daisuke Ikefuji , Osamu Hoshuyama
CPC classification number: G01S13/9005 , G01S7/046 , G01S13/9027 , G01S13/9056
Abstract: A synthetic aperture radar image analysis system 20 includes: a phase correlation determination means 21 which determines a strength of the phase correlation between a plurality of pixels in an image selected from among a plurality of images on the basis of the plurality of images that have been photographed by a synthetic aperture radar and show the same point; a shape determination means 22 which determines a degree of similarity between the shape of the distribution of the plurality of pixels and an object shape indicated by geospatial information; and an association means 23 which associates the plurality of pixels with the object on the basis of the determined strength of the phase correlation and the determined degree of similarity.
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16.发明公开公开(公告)号：US20230230380A1
公开(公告)日：2023-07-20
申请号：US18008088
申请日：2021-04-22
Applicant: NEC Corporation
Inventor： Gaku Nakano , Shoji Nishimura , Yoshitaka Higeta , Youtarou Noda , Shigeki Shinoda , Yuzo Senda , Shin Tominaga , Masumi Ishikawa , Daisuke Ikefuji , Kana Takizawa , Kenichi Ishii , Yoshiyuki Satou , Eishi Arita , Shota Yamamoto , Shinya Yamasaki , Narumitsu Notomi , Aki Nakamura
CPC classification number: G06V20/52 , G06T7/70 , G06T7/60 , G08B21/02 , G06T2207/30196 , G06T2207/30244
Abstract: An image processing apparatus includes an image processing unit and a risk information generation unit. By processing at least one image, the image processing unit identifies a caution-requiring location being a location where a proximity indicator being an indicator related to a proximity state between a plurality of persons satisfies a criterion. The risk information generation unit outputs information indicating the caution-requiring location. For example, the information is displayed on a display unit through a display control unit. For each person, the image processing unit computes a first distance being the distance to the closest person to the person. Then, for each of a plurality of locations, the image processing unit counts the number of times the first distance has a reference value or less. Then, the proximity indicator is set by using the number of times the first distance has the reference value or less.
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