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    QUANTUM CRYPTOGRAPHIC COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND CONTROL METHOD THEREOF
    13.
    发明申请
    QUANTUM CRYPTOGRAPHIC COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND CONTROL METHOD THEREOF 有权

    公开(公告)号：US20250030541A1

    公开(公告)日：2025-01-23

    申请号：US18716551

    申请日：2021-12-16

    Applicant: NEC Corporation

    Inventor： Hiroshi IMAI

    IPC: H04L9/08 ,  H04L9/12

    Abstract: A quantum cryptographic communication system includes a transmitter (Alice) and a receiver (Bob) which are optically connected through an optical transmission line. The transmitter transmits signal light having a quantum state and reference light having no quantum state to the receiver through the optical transmission line. The receiver includes an optical amplifier that amplifies the reference light; a homodyne detector that generates a signal output based on amplified reference light and the received signal light; a level detector that detects a signal output level from the signal output; and an optical amplifier controller that controls a gain of the optical amplifier based on at least the signal output level.

    ABNORMALITY DETERMINATION DEVICE, ABNORMALITY DETERMINATION METHOD, AND PROGRAM STORAGE MEDIUM
    14.
    发明申请
    ABNORMALITY DETERMINATION DEVICE, ABNORMALITY DETERMINATION METHOD, AND PROGRAM STORAGE MEDIUM 有权

    公开(公告)号：US20230003664A1

    公开(公告)日：2023-01-05

    申请号：US17780631

    申请日：2019-12-04

    Applicant: NEC Corporation

    Inventor： Hiroshi IMAI

    IPC: G01N21/89 ,  G01N21/88 ,  G06T7/00 ,  G06T7/20 ,  G06V10/24 ,  G06V10/74

    Abstract: The coordinate system fixing unit uses the displacement of an object under measurement between photographed images in chronological order to generate fixed-coordinate chronological images. The displacement calculation unit uses the fixed-coordinate chronological images to calculate a two-dimensional spatial distribution of the displacement of the surface of the object under measurement. The displacement difference calculation unit calculates a two-dimensional displacement difference distribution by removing an error component from the two-dimensional spatial distribution. The depth movement amount calculation unit calculates a depth movement amount from the two-dimensional displacement difference distribution. The displacement separation unit calculates in-plane displacement from the two-dimensional displacement difference distribution. The determination unit uses the in-plane displacement and/or the depth movement amount to determine whether there is an abnormality in the object under measurement.

    INFORMATION PROVISION SYSTEM, INFORMATION PROVISION METHOD, AND STORAGE MEDIUM
    15.
    发明申请
    INFORMATION PROVISION SYSTEM, INFORMATION PROVISION METHOD, AND STORAGE MEDIUM 有权

    公开(公告)号：US20210409396A1

    公开(公告)日：2021-12-30

    申请号：US17294795

    申请日：2018-11-21

    Applicant: NEC Corporation

    Inventor： Chisato FUNAYAMA ,  Masato TSUKADA ,  Keiichi CHONO ,  Yuka OGINO ,  Hiroshi IMAI ,  Shoji YACHIDA ,  Takashi SHIBATA

    IPC: H04L29/06

    Abstract: Provided are a system, a method, and the like which contribute to more reliably and smoothly providing information relating to an authentication result to a person who has been subjected to authentication. An information provision system according to an embodiment of the present invention comprises: an authentication unit which authenticates an authentication subject, who is to be subjected to authentication, using a captured image of the authentication subject; a determination unit which, in accordance with information about the authentication subject or the conditions of the authentication subject, determines the transmission destination to which information relating to the authentication result is to be transmitted in order to notify the authentication subject of the authentication result; and a transmission unit which transmits the information to the determined transmission destination.

    STRUCTURE STATUS DETERMINATION DEVICE, STATUS DETERMINATION SYSTEM, AND STATUS DETERMINATION METHOD
    16.
    发明申请
    STRUCTURE STATUS DETERMINATION DEVICE, STATUS DETERMINATION SYSTEM, AND STATUS DETERMINATION METHOD 审中-公开

    公开(公告)号：US20180106609A1

    公开(公告)日：2018-04-19

    申请号：US15556369

    申请日：2016-03-14

    Applicant: NEC Corporation

    Inventor： Hiroshi IMAI

    IPC: G01B11/30 ,  G01N21/88 ,  G01B11/03 ,  G06T7/32

    CPC classification number: G01B11/30 ,  G01B11/03 ,  G01B11/16 ,  G01M5/0033 ,  G01M5/0041 ,  G01M5/0091 ,  G01N21/88 ,  G01N21/892 ,  G01N21/93 ,  G01N21/9515 ,  G01N2021/8887 ,  G06T7/001 ,  G06T7/32 ,  G06T2207/10016 ,  G06T2207/20021 ,  G06T2207/20212 ,  G06T2207/20228 ,  G06T2207/30132

    Abstract: The purpose of the present invention is to accurately detect, from a remote location without contact, a structure's defects such as cracking, separation, and internal cavities by distinguishing therebetween. The status determination device includes: a displacement calculation unit that, from time-series images of a structure surface before and after loading application, calculates a two-dimensional spatial distribution of a displacement of the time-series images; a depth moving amount calculation unit that calculates a moving amount of the structure surface in a normal direction due to the loading application, from the two-dimensional spatial distribution of the displacement of the time-series images; a displacement separation unit that calculates a correction amount based on the moving amount, and separates a two-dimensional spatial distribution of a displacement of the structure surface, by subtracting the correction amount from the two-dimensional spatial distribution of the displacement of the time-series images; and an abnormality determination unit that identifies a defect of the structure, based on comparison of the two-dimensional spatial distribution of the displacement of the structure surface and the moving amount, with a spatial distribution of a displacement having been prepared in advance and a threshold value for the moving amount.

    STRUCTURE STATUS DETERMINATION DEVICE, STATUS DETERMINATION SYSTEM, AND STATUS DETERMINATION METHOD
    17.
    发明申请
    STRUCTURE STATUS DETERMINATION DEVICE, STATUS DETERMINATION SYSTEM, AND STATUS DETERMINATION METHOD 审中-公开

    公开(公告)号：US20180052117A1

    公开(公告)日：2018-02-22

    申请号：US15555154

    申请日：2016-03-14

    Applicant: NEC Corporation

    Inventor： Hiroshi IMAI

    IPC: G01N21/88 ,  G01B11/30

    CPC classification number: G01N21/8851 ,  G01B11/30 ,  G01M5/0033 ,  G01M5/0075 ,  G01M5/0091 ,  G01N21/88 ,  G01N2021/8864 ,  G01N2021/8896

    Abstract: The purpose of the present invention is to accurately detect structures from a remote location without contact while distinguishing between defects such as cracking, separation, and internal cavities. This status determination device includes: a displacement calculation unit that calculates a two-dimensional spatial distribution of displacement in time-series images, said time-series images being taken before and after a load is applied to a surface of a structure; a correction amount calculation unit that calculates a correction amount from the two-dimensional spatial distribution of displacement in the time-series images, said correction amount being based on the amount of movement of the structure surface in the normal direction as induced by said loading; a displacement correction unit that subtracts the correction amount from the two-dimensional spatial distribution of displacement in the time-series images, and extracts a two-dimensional spatial distribution of displacement of the structure surface; and an abnormality determination unit for identifying defects in the structure on the basis of a comparison of the two-dimensional spatial distribution of displacement of the structure surface and a pre-prepared spatial distribution of displacement.

    ABNORMALITY DETERMINATION SYSTEM, IMAGING DEVICE AND ABNORMALITY DETERMINATION METHOD
    19.
    发明申请
    ABNORMALITY DETERMINATION SYSTEM, IMAGING DEVICE AND ABNORMALITY DETERMINATION METHOD 有权

    公开(公告)号：US20230111602A1

    公开(公告)日：2023-04-13

    申请号：US17908019

    申请日：2020-03-09

    Applicant: NEC Corporation

    Inventor： Hiroshi IMAI

    IPC: G02B17/06 ,  G06T7/00 ,  G02B5/04

    Abstract: An imaging device outputs time series images that include multiple captured images that capture over time the surface of the object to be measured. On the optical path extending from the object to be measured, through a lens equipped on the imaging device and up to the imaging surface, the optical path bending member is interposed in a part of the optical path between the object to be measured and a lens. The optical path bending member bends the light traveling from the lens to the imaging surface so as to tilt the light in a direction such that the direction of travel thereof approaches the optical axis of the lens. This abnormality determination device utilizes the in-plane displacement and out-of-plane displacement calculated from the time series images to determine abnormalities in the measured object.

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