公开(公告)号：US20240249433A1

公开(公告)日：2024-07-25

申请号：US18289913

申请日：2021-05-17

Applicant: NEC Corporation

Inventor： Jiro ABE ,  Yoshimasa Ono

IPC: G06T7/73 ,  G01S17/86 ,  G01S17/89

CPC classification number: G06T7/74 ,  G01S17/86 ,  G01S17/89 ,  G06T2207/10028 ,  G06T2207/30244

Abstract: An imaging condition determination system according to the present disclosure includes: a reference data holding unit (101) configured to hold reference data representing a position of an object; an indication object holding unit (102) configured to hold an indication object representing a position of a target object on the reference data; an imaging condition determination unit (103) configured to determine an imaging condition of LiDAR for imaging the target object based on the reference data and the indication object; and an imaging condition output unit (104) configured to output the imaging condition.

公开(公告)号：US20210287356A1

公开(公告)日：2021-09-16

申请号：US17193136

申请日：2021-03-05

Applicant: NEC Corporation

Inventor： Shigeo Suzuki ,  Taisuke Tanabe ,  Hiroshi Matsumoto ,  Takanori Shigeta ,  Junichi Abe ,  Akira Tsuji ,  Yoshimasa Ono ,  Jiro Abe

IPC: G06T7/00 ,  G01S17/42 ,  G01S17/86

Abstract: An abnormal part display apparatus, an abnormal part display system, an abnormal part displaying method, and an abnormal part displaying program capable of improving visibility of an abnormal part in an object are provided. An abnormal part display apparatus 11 according to the present disclosure includes an acquisition unit 111 configured to acquire point group data of an object obtained by measuring the object by using a laser ranging apparatus 12, and a photograph image of the object obtained by photographing the object by using a photographing apparatus 13, a display unit 112 configured to display the point group data and the photograph image on a predetermined screen, and a control unit 113 configured to control the point group data and the photograph image to be displayed in the display unit 112.

公开(公告)号：US10862593B2

公开(公告)日：2020-12-08

申请号：US16088328

申请日：2017-03-17

Applicant: NEC Corporation

Inventor： Kohei Hosokawa ,  Toshiharu Ito ,  Seigo Takahashi ,  Manabu Arikawa ,  Takashi Ishikawa ,  Yoshimasa Ono

IPC: H04B10/69 ,  H04J14/04 ,  H04B17/336 ,  H04B10/11

Abstract: The objective of the present invention is to reduce the size of a receiving device circuit in an optical space communication system while maintaining communication stability. A data receiving device which decodes one item of data from a plurality of input signals includes: two or more digital signal processing means for subjecting the plurality of input signals to signal processing; a first recording means for temporarily recording the plurality of input signals; a SN ratio estimating means for estimating S/N ratios of each of the plurality of input signals and determining the number of the plurality of input signals to be combined, and the signals to be combined; and a scheduling means for carrying out overall control on the basis of the results from the SN ratio estimating means.

公开(公告)号：US10735093B2

公开(公告)日：2020-08-04

申请号：US16466702

申请日：2017-12-11

Applicant: NEC Corporation

Inventor： Yoshimasa Ono ,  Toshiharu Ito

IPC: H04B10/079 ,  H04B10/118

Abstract: An optical space communication device includes first and second optical antennas that transmit first and second transmission light and receive first and second reception light, first and second delay circuits that provide a delay to transmission data included in the first and second transmission light, third and fourth delay circuits that provide a delay to reception data included in the first and second reception light, and a receiver that sets a delay of at least one of the first delay circuit and the second delay circuit and sets a delay of at least one of the third delay circuit and the fourth delay circuit, based on delays between the first and third delay circuits and the first optical antenna, delays between the second and fourth delay circuits and a fourth optical antenna, and delays between a communication destination and the third and fourth delay circuits.

公开(公告)号：US10454577B2

公开(公告)日：2019-10-22

申请号：US15751369

申请日：2016-08-17

Applicant: NEC CORPORATION

Inventor： Seigo Takahashi ,  Toshiharu Ito ,  Kohei Hosokawa ,  Manabu Arikawa ,  Yoshimasa Ono ,  Takashi Ishikawa

IPC: H04B10/118 ,  H04B10/112 ,  H04B10/116 ,  H04B10/50 ,  H04B10/61

Abstract: It is difficult in a free space optical transmitter to transmit a beacon beam stably at low cost, and that it is impossible to maintain stable tracking; therefore, a free space optical transmitter according to an exemplary aspect of the present invention includes a laser beam transmitting means for transmitting a plurality of laser beams capable of interfering with each other and differing in one of an optical frequency and a time variation in a phase difference; and a wavefront control beam transmitting means for transmitting, to a free space, a plurality of wavefront control beams obtained by making each of the plurality of laser beams have a different wavefront.

公开(公告)号：US12217482B2

公开(公告)日：2025-02-04

申请号：US17637132

申请日：2019-08-28

Applicant: NEC Corporation

Inventor： Yoshimasa Ono ,  Akira Tsuji ,  Junichi Abe

IPC: G06V10/762 ,  G06V10/764

Abstract: A processing apparatus (10) includes classification means (12) for classifying three-dimensional point group data acquired based on a reflected light from a structure to be inspected illuminated by light into clusters, which are units of a shape that corresponds to the structure to be inspected, based on positional information at each point of the data; and cluster association means (13) for determining whether a first cluster and a second cluster included in the classified clusters correspond to one structure to be inspected based on a positional relation between the classified clusters.

公开(公告)号：US12154258B2

公开(公告)日：2024-11-26

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 ,  G01B11/30 ,  G01C3/06 ,  G01N21/956 ,  G01S17/06 ,  G01S17/89 ,  G06T7/70 ,  G06V10/764

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.

公开(公告)号：US11417144B2

公开(公告)日：2022-08-16

申请号：US17431784

申请日：2019-02-22

Applicant: NEC Corporation

Inventor： Yoshimasa Ono ,  Shigeru Nakamura ,  Atsufumi Shibayama ,  Junichi Abe

IPC: G06V40/12 ,  G06V40/13 ,  G06T7/50 ,  G06T7/73 ,  G06T7/13

Abstract: A technique for accurately extracting a fingerprint image for accurate authentication from 3D tomographic luminance data of a finger at a high speed. A processing apparatus (11) according to the present disclosure includes means for, after performing edge detection processing on a tomographic image (101, 102, . . . 10 k, . . . , 10n) at each depth, calculating the total number of edge pixels in the tomographic image from 3D (three-dimensional) tomographic luminance data, and acquiring depth dependence of the number of edges (111, 112), and means for extracting a tomographic image having a striped pattern from the depth dependence of the number of edges and the 3D tomographic luminance data.

公开(公告)号：US10511409B2

公开(公告)日：2019-12-17

申请号：US15773035

申请日：2016-11-01

Applicant: NEC CORPORATION

Inventor： Kohei Hosokawa ,  Toshiharu Ito ,  Manabu Arikawa ,  Seigo Takahashi ,  Takashi Ishikawa ,  Yoshimasa Ono

IPC: H04L1/00 ,  H04L27/22 ,  H04B10/118 ,  H04B10/61 ,  H04L27/00

Abstract: An appropriate synthesized signal cannot be obtained by only correcting relative phase errors of a plurality of received signals; therefore, a received signal processor according to an exemplary aspect of the present invention includes a plurality of signal-to-noise ratio estimation means for estimating respective signal-to-noise ratios of a plurality of digital signal sequences in which relative phase errors of a plurality of received signal sequences having been corrected; a plurality of temporary decision means for performing symbol decisions of the plurality of digital signal sequences and outputting symbol signal sequences; symbol-map-rotation determination means for determining respective phase rotation amounts of the plurality of digital signal sequences from the plurality of symbol signal sequences and the respective signal-to-noise ratios of the plurality of digital signal sequences; and a plurality of phase rotation means for rotating phases of the plurality of digital signal sequences respectively based on the phase rotation amounts.

公开(公告)号：US12175593B2

公开(公告)日：2024-12-24

申请号：US17801325

申请日：2020-03-10

Applicant: NEC Corporation

Inventor： Yoshimasa Ono ,  Akira Tsuji ,  Shigeo Suzuki ,  Junichi Abe ,  Jiro Abe

IPC: G06T15/20

Abstract: A display device (10) according to the present disclosure includes: a detection unit (11) that detects, in a three-dimensional space including measurement point group data measured by a three-dimensional optical sensor, intermediate point group data of an intermediate region from a viewpoint for two-dimensionally displaying the measurement point group data to target point group data within the measurement point group data; a setting unit (12) that sets, based on the detected intermediate point group data, a display aspect of the measurement point group data or the target point group data in such a way that the target point group data become visually recognizable from the viewpoint; and a display unit (13) that two-dimensionally displays the measurement point group data and the target point group data according to the set display aspect.