公开(公告)号：US20250046097A1

公开(公告)日：2025-02-06

申请号：US18716113

申请日：2021-12-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yukihiro GOTO ,  Mitsuyasu YANAGIDA ,  Yusuke SAKURAHARA ,  Takashi EBINE

IPC: G06V20/58

Abstract: An object of the present disclosure is to enable extraction of a point cloud of a linear object such as a cable having a sparse point cloud.
The present disclosure is a device and a method in which point cloud data representing three-dimensional coordinates and a movement track at the time of measuring the point cloud data are acquired, and the number of point clouds within a certain distance DN from the point cloud on the movement track is repeatedly counted to extract a point cloud of a linear object such as a cable 92.

公开(公告)号：US20250014271A1

公开(公告)日：2025-01-09

申请号：US18711659

申请日：2021-11-25

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yusuke SAKURAHARA ,  Mitsuyasu YANAGIDA ,  Yukihiro GOTO ,  Takashi EBINE

IPC: G06T17/00

Abstract: There is provided an apparatus for creating a three-dimensional model of an object having a small diameter from point cloud data representing three-dimensional coordinates. The apparatus is configured to cluster points included in the point cloud data, obtain a curve passing through points in a cluster for at least one cluster, extract point clouds disposed on a curve coincident with the curve passing through the points, and create a three-dimensional model of the object by connecting the extracted point clouds.

公开(公告)号：US20240369355A1

公开(公告)日：2024-11-07

申请号：US18293408

申请日：2021-08-25

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Masaki NAKAMORI ,  Nazuki HONDA ,  Mitsuyasu YANAGIDA ,  Yukihiro GOTO

IPC: G01B11/30 ,  G01N21/3581 ,  G01N21/952

Abstract: An object of the present disclosure is to enable inspection of an invisible portion covered with a cover or the like with a quantitative index even with backlight. The present disclosure provides a device and a method for determining deterioration of a metal structure having an uneven structure. An image indicating unevenness of a surface of the metal structure measured using a terahertz wave is acquired. The deterioration of the metal structure is determined by analyzing the acquired image.

公开(公告)号：US20240330537A1

公开(公告)日：2024-10-03

申请号：US18576083

申请日：2021-07-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yukihiro GOTO ,  Mitsuyasu YANAGIDA ,  Nazuki HONDA

IPC: G06F30/20 ,  G06F30/10

CPC classification number: G06F30/20 ,  G06F30/10

Abstract: An object of the present disclosure is to reduce a work time for creating correct data and to enable creation of correct data even for a target that does not exist in the actual environment.
The present disclosure is a device and method in which a correction value according to relative positions of a correction data acquisition object and a point cloud measuring instrument is calculated using correction point cloud data obtained by measuring the correction data acquisition object having a known shape with the point cloud measuring instrument and installation positions of the point cloud measuring instrument and the correction data acquisition object at a time of measuring the correction point cloud data; ideal point cloud coordinates obtained when a measurement target is measured with the point cloud measuring instrument are calculated using simulation data of the measurement target; and the ideal point cloud coordinates are corrected with a correction value according to relative positions of the measurement target and the point cloud measuring instrument to generate correct point cloud data simulating the measurement target.