公开(公告)号：US20160285562A1

公开(公告)日：2016-09-29

申请号：US15033955

申请日：2014-10-23

Applicant: NEC CORPORATION

Inventor： Daisaku OGASAHARA ,  Junichi ABE

IPC: H04B10/61 ,  H04L27/26 ,  H04B10/079

CPC classification number: H04B10/6164 ,  H04B10/0795 ,  H04B10/6165 ,  H04L27/265

Abstract: When a frequency deviation compensation amount is compensated for by use of frequency shift, a phase offset occurs between adjacent input blocks included in a plurality of input blocks as divided, with the result that an error occurs in a reconstructed bit sequence. A frequency deviation compensation system of the invention is characterized by comprising: a frequency deviation compensation means for compensating for a frequency deviation occurring in a signal by use of frequency shift; and a phase offset compensation means for compensating for a phase offset occurring, in the signal, due to the frequency shift.

Abstract translation: 当通过使用频率补偿频率偏移补偿量时，在分割的多个输入块中包括的相邻输入块之间发生相位偏移，结果是在重构的比特序列中出现错误。 本发明的频偏补偿系统的特征在于包括：频偏补偿装置，用于通过使用频移补偿信号中发生的频偏; 以及相位偏移补偿装置，用于补偿在信号中由于频率偏移而发生的相位偏移。

公开(公告)号：US20250091623A1

公开(公告)日：2025-03-20

申请号：US18820903

申请日：2024-08-30

Applicant: NEC Corporation

Inventor： Shingo YAMANOUCHI ,  Toshiyuki NOMURA ,  Junichi ABE ,  Hidemi NOGUCHI ,  Yoshimasa ONO ,  Tatsuya FUJIMOTO

IPC: B61L15/00 ,  B61L23/04 ,  G06V10/82 ,  G06V20/56

Abstract: An obstacle monitoring system includes: a sensing means; a first obstacle detection means; and a control means for selectively executing a plurality of control modes including a first control mode in which a moving speed of a moving body is a first moving speed and a sensing field of view of the sensing means is a first field of view, and a second control mode in which a moving speed of the moving body is a second moving speed and a sensing field of view of the sensing means is a second field of view. When the first obstacle detection means detects the obstacle while the control means is executing the first control mode, the control means executes the second control mode in such a way as to capture the obstacle within the second field of view.

公开(公告)号：US20250069263A1

公开(公告)日：2025-02-27

申请号：US18796607

申请日：2024-08-07

Applicant: NEC Corporation

Inventor： Tatsuya FUJIMOTO ,  Junichi ABE ,  Hidemi NOGUCHI

IPC: G06T7/73 ,  G06V10/46

Abstract: An object detection system includes: a point cloud missing region extraction means for extracting a point cloud missing region being a region where a point cloud is missing in a three-dimensional point cloud; and an object estimation means for estimating presence of an object, based on the point cloud missing region.

公开(公告)号：US20250045985A1

公开(公告)日：2025-02-06

申请号：US18926634

申请日：2024-10-25

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Shigeru NAKAMURA ,  Atsufumi SHIBAYAMA ,  Junichi ABE

IPC: G06T11/00 ,  G06F21/32 ,  G06T15/04 ,  G06T15/08 ,  G06V40/12 ,  G06V40/13

Abstract: Provided is a processing apparatus capable of obtaining a 2D image from 3D tomographic images, extracting an image for accurate authentication, and extracting an image at a high speed. A processing apparatus includes: means for calculating, from three-dimensional luminance data indicating an authentication target, depth dependence of striped pattern sharpness in a plurality of regions on a plane perpendicular to a depth direction of the target; means for calculating a depth at which the striped pattern sharpness is the greatest in the depth dependence of striped pattern sharpness; rough adjustment means for correcting the calculated depth on the basis of depths of other regions positioned respectively around the plurality of regions; fine adjustment means for selecting a depth closest to the corrected depth and at which the striped pattern sharpness is at an extreme; and means for extracting an image with a luminance on the basis of the selected depth.

公开(公告)号：US20230333250A1

公开(公告)日：2023-10-19

申请号：US18025808

申请日：2020-09-16

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Junichi ABE ,  Hidemi NOGUCHI ,  Akira TSUJI ,  Jiro ABE

IPC: G01S17/66

CPC classification number: G01S17/66

Abstract: A monitoring system according to the present disclosure includes: a straight line calculation unit configured to calculate a straight line connecting three-dimensional coordinates of a light source and three-dimensional coordinates of a three-dimensional measuring device configured to measure a target to be measured; an invalid region determination unit configured to define a three-dimension invalid region in which point cloud data acquired by the three-dimensional measuring device is invalid based on the straight line; and a point cloud data processing unit configured to monitor the target to be measured based on the acquired point cloud data and the three-dimension invalid region.

公开(公告)号：US20230136554A1

公开(公告)日：2023-05-04

申请号：US17912950

申请日：2020-03-31

Applicant: NEC Corporation

Inventor： Akira TSUJI ,  Junichi ABE ,  Taisuke TANABE

IPC: G01N21/88 ,  G06T7/13 ,  G06V10/60 ,  G06V10/764

Abstract: A detection device (20) according to the present disclosure includes an acquisition unit (11) that acquires point cloud data indicating a distance to an object and luminance information obtained from reflected light of a beam emitted when the point cloud data is measured, an edge detection unit (12) that performs edge detection based on the luminance information, a classification unit (21) that classifies, based on distribution of points contained in a crack candidate being a set of points detected as an edge, a plurality of the crack candidates into one of groups, and a label assignment unit (23) that accepts input of a label regarding the group from a user having visually recognized a shape of the crack candidate belonging to the group.

公开(公告)号：US20220416903A1

公开(公告)日：2022-12-29

申请号：US17899786

申请日：2022-08-31

Applicant: NEC Corporation

Inventor： Junichi ABE ,  Tatsuya Nakamura

IPC: H04B10/516 ,  H04L27/38 ,  H04L27/36 ,  H04B10/25

Abstract: If a configuration is employed in which modulation schemes used for an optical communication system can be switched depending on transmission conditions, the power consumption increases and the control becomes complex; therefore, an optical transmitter according to an exemplary aspect of the present invention includes an encoding means for encoding digital signals to be transmitted under a predetermined transmission condition over an optical carrier wave by using one of a plurality of encoding methods; an encoding control means for selecting a predetermined encoding method corresponding to the predetermined transmission condition from among the plurality of encoding methods and causing the encoding means to operate in accordance with the predetermined encoding method; a mapping means for mapping output bit signals output from the encoding means to modulation symbols; and an optical modulation means for modulating the optical carrier wave based on symbol signals output from the mapping means.

公开(公告)号：US20220277498A1

公开(公告)日：2022-09-01

申请号：US17630228

申请日：2019-08-01

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Shigeru NAKAMURA ,  Atsufumi SHIBAYAMA ,  Junichi ABE

IPC: G06T11/00 ,  G06T15/04 ,  G06T15/08 ,  G06V40/12 ,  G06V40/13

Abstract: Provided is a processing apparatus capable of obtaining a 2D image from 3D tomographic images, extracting an image for accurate authentication, and extracting an image at a high speed. A processing apparatus includes:
means for calculating, from three-dimensional luminance data indicating an authentication target, depth dependence of striped pattern sharpness in a plurality of regions on a plane perpendicular to a depth direction of the target; means for calculating a depth at which the striped pattern sharpness is the greatest in the depth dependence of striped pattern sharpness; rough adjustment means for correcting the calculated depth on the basis of depths of other regions positioned respectively around the plurality of regions; fine adjustment means for selecting a depth closest to the corrected depth and at which the striped pattern sharpness is at an extreme; and means for extracting an image with a luminance on the basis of the selected depth.

公开(公告)号：US20220276181A1

公开(公告)日：2022-09-01

申请号：US17635523

申请日：2019-08-26

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Akira TSUJI ,  Junichi ABE

IPC: G01N21/95 ,  G01S17/89

Abstract: The present disclosure is directed to providing a surface anomaly detecting device, a system, a method, and a non-transitory computer-readable medium that can identify an anomalous portion on a surface of a complex structure. A surface anomaly detecting device according to the present disclosure includes: dividing means configured to divide a structure into a plurality of clusters based on position information of a plurality of points on a surface of the structure; coupling means configured to create a cluster group by coupling together two or more of the clusters; determining means configured to determine a reflection luminance normal value of the cluster group based on a distribution of reflection luminance values at a plurality of points on a surface of the cluster group; and identifying means configured to identify an anomalous portion on the surface of the cluster group.

公开(公告)号：US20220156914A1

公开(公告)日：2022-05-19

申请号：US17599757

申请日：2020-03-17

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Akira TSUJI ,  Hidemi NOGUCHI ,  Junichi ABE

IPC: G06T7/00 ,  G06V10/764 ,  G06T7/70 ,  G01B11/30 ,  G01S17/89

Abstract: There is provided a surface abnormality detection device, and a system, capable of detecting an abnormal portion having a displacement below the distance measurement accuracy when detecting the abnormal portion on the surface of a structure. A surface abnormality detection device includes a classification means for classifying an object under measurement into one or more clusters having the same structure, based on position information at a plurality of points on a surface of the object under measurement; a determination means for determining a reflection brightness normal value of the cluster based on a distribution of reflection brightness values at a plurality of points on a surface of the cluster; and an identification means for identifying an abnormal portion on the surface of the cluster based on a difference between the reflection brightness normal value and the reflection brightness value at each of the plurality of points.