公开(公告)号：US20250095288A1

公开(公告)日：2025-03-20

申请号：US18727330

申请日：2022-01-14

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yusuke SAKURAHARA ,  Yukihiro GOTO ,  Masaki WAKI ,  Takashi EBINE

IPC: G06T17/00 ,  G06T19/20

Abstract: An object of the present disclosure is to enable a three-dimensional model to be created even for a target object which has unevenly spaced inter-point distances and only a part of a point cloud. According to the present disclosure, there are provided an apparatus and a method in which a three-dimensional model of a target object is created from point cloud data in which each point represents three-dimensional coordinates, the three-dimensional model is superimposed on an image in which a target object of the three-dimensional model is photographed, a point cloud data to be added to a point cloud data that constitutes the three-dimensional model is selected by comparing the three-dimensional model with the target object in the image, and the three-dimensional model of the target object is created again using the point cloud data including the point cloud to be added.

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：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：US20240320865A1

公开(公告)日：2024-09-26

申请号：US18579806

申请日：2021-08-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yusuke SAKURAHARA ,  Nazuki HONDA ,  Masaaki INOUE

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: An object of the present invention is to provide a data processing device, a data processing method, and a program capable of compressing 3D point cloud data while maintaining the accuracy of restored coordinates to the extent that it can be used for a communication facility inspection technique. A data processing device according to the present invention divides measured point cloud data for each facility on the basis of a identification function, generates an image file in which each coordinate value is regarded as each color signal for each of the divided point cloud data, performs image compression processing on the image file with a compression ratio determined for each facility, and stores the image file subjected to the image compression processing and the parameters used for the image compression processing in association with each other.

公开(公告)号：US20250095287A1

公开(公告)日：2025-03-20

申请号：US18727325

申请日：2022-01-14

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yusuke SAKURAHARA ,  Yukihiro GOTO ,  Masaki WAKI ,  Takashi EBINE

IPC: G06T17/00

Abstract: An object of the present disclosure is to enable a three-dimensional model to be created even for a target object which has unevenly spaced inter-point distances and only a part of a point cloud.
According to the present disclosure, there are provided an apparatus and a method in which, a three-dimensional model of a target object is created from point cloud data in which each point represents three-dimensional coordinates, the three-dimensional model is superimposed on an image in which a target object of the three-dimensional model is photographed, a superimposed image generated by the superimposition is displayed, and when a range of the target object in the superimposed image is input, a three-dimensional model is created again using point cloud data in which a point is located in a range of the superimposed image.

公开(公告)号：US20240428536A1

公开(公告)日：2024-12-26

申请号：US18274119

申请日：2021-02-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yusuke SAKURAHARA ,  Masaaki INOUE ,  Tomoya SHIMIZU ,  Nazuki HONDA

IPC: G06T19/20

Abstract: An object of the present disclosure is to enable superimposition of point cloud data in relative coordinates acquired by a three-dimensional laser scanner on point cloud data in absolute coordinates, even when errors occur in the distance measurement by the three-dimensional laser scanner. The present disclosure is a three-dimensional point cloud coordinate conversion device configured to acquire first and second point cloud data of relative coordinates centered at first and second origins and absolute coordinates of the first and second origins, specify reference points of an object to be measured included in the first and second point cloud data respectively, specify a contact point between circles having distances from the first origin and the second origin to the reference points as their radii, by changing at least either the first distance or the second distance, specify a rotation angle for converting the first and second point cloud data into absolute coordinates on the basis of the three points, i.e., the contact point, the first or second origin, and the reference points of the object to be measured, and rotate the first and second point cloud data.

公开(公告)号：US20250104345A1

公开(公告)日：2025-03-27

申请号：US18730846

申请日：2022-01-31

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yusuke SAKURAHARA ,  Yukihiro GOTO ,  Takashi EBINE

IPC: G06T17/00 ,  G06V10/60 ,  G06V10/764

Abstract: Provided is a device and a method for extracting point clouds of structures from point clouds by clustering a point cloud in which each point represents three-dimensional coordinates, and detecting a target facility from the structures using reflection intensities of the extracted point clouds of the structures.

公开(公告)号：US20240346700A1

公开(公告)日：2024-10-17

申请号：US18292099

申请日：2021-08-06

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yusuke SAKURAHARA ,  Yukihiro GOTO ,  Nazuki HONDA

IPC: G06T9/00 ,  G06T17/00

CPC classification number: G06T9/001 ,  G06T17/00 ,  G06T2210/56

Abstract: An object of the present invention is to provide a data compression device, a data compression method, and a program capable of thinning out a point group acquired by a 3D laser scanner without affecting the creation of a 3D model. A data compression device (50) according to the present invention is a data compression device which compresses three-dimensional (3D) point group data indicating 3D coordinates of points on a surface of an outdoor structure acquired using a 3D laser scanner while moving including: a point group deleting part (at least one of 51 and 52) which thins out the 3D point group data according to an arbitrary criterion and calculates scan lines deleted through the thinning-out of the 3D point group data; and an extraction processing part (53) which creates a 3D model from the thinned 3D point group data while skipping the deleted scan lines which are stored.