-
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.
-
Patent Agency Ranking
公开(公告)号：US20220230347A1
公开(公告)日：2022-07-21
申请号：US17608975
申请日：2019-05-08
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hitoshi NIIGAKI , Masaki WAKI , Masaaki INOUE , Yasuhiro YAO , Tomoya SHIMIZU , Hiroyuki OSHIDA , Kana KURATA , Shingo ANDO , Atsushi SAGATA
Abstract: It is possible to estimate a slack level accurately in consideration of a shape of a deformed cable. A point cloud analysis device sets a plurality of regions of interest obtained by window-searching a wire model including a quadratic curve model representing a cable obtained from a point cloud consisting of three-dimensional points on an object, the region of interest being divided into a first region and a second region. The point cloud analysis device compares information on the first region with information on the second region based on the point cloud included in the region of interest and the quadratic curve model for each of the plurality of regions of interest, calculates a degree of division boundary representing a degree to which a division position between the first region and the second region of the plurality of regions of interest is a branch point of the cable, and detects a division boundary point that is a branch point of a cable represented by the quadratic curve model based on the degree of division boundary calculated for each of the plurality of regions of interest.
-
公开(公告)号：US20220172389A1
公开(公告)日：2022-06-02
申请号：US17437887
申请日：2020-03-18
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Masaaki INOUE , Tomoya SHIMIZU , Ryuji HONDA , Hiroyuki OSHIDA
Abstract: A structure detection device according to an embodiment includes: a reading processing unit that reads, as three-dimensional point group data on an object present in a three-dimensional space, data including three-dimensional position information and color information at a point on a surface of the object; a filtering processing unit that performs filtering processing for extracting three-dimensional point group data on a detection-target structure from the three-dimensional point group data on the object present in the three-dimensional space based on the color information; and a generation processing unit that generates three-dimensional model data in which the detection-target structure is represented as a three-dimensional model based on the three-dimensional point group data on the detection-target structure, the three-dimensional point group data being extracted by the filtering processing unit.
-
公开(公告)号：US20220215572A1
公开(公告)日：2022-07-07
申请号：US17608963
申请日：2019-05-08
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hitoshi NIIGAKI , Yasuhiro YAO , Masaaki INOUE , Tomoya SHIMIZU , Yukihiro GOTO , Shigehiro MATSUDA , Ryuji HONDA , Hiroyuki OSHIDA , Kana KURATA , Shingo ANDO , Atsushi SAGATA
Abstract: Provided is a point cloud analysis device that curbs a decrease in model estimation accuracy due to a laser measurement point cloud. A clustering unit (30) clusters a point cloud representing a three-dimensional point on an object obtained by a measurement unit mounted on a moving body and performing measurement while scanning a measurement position, within a scan line, to obtain a point cloud cluster. A central axis direction estimation unit (32) estimates a central axis direction based on the point cloud cluster. A direction-dependent local effective length estimation unit (34) estimates a local effective length based on an estimated central axis direction and an interval of scan lines, the local effective length being a length when a length of projection of the point cloud cluster in a central axis direction for each of the point cloud clusters is interpolated by an amount of a loss part of the point cloud.
-
公开(公告)号：US20220172114A1
公开(公告)日：2022-06-02
申请号：US17437168
申请日：2020-02-27
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Takashi GOTO , Tomoya SHIMIZU , Yukihiro GOTO
Abstract: A machine learning device, a deterioration estimation device, and a deterioration diagnostic apparatus capable of estimating a deterioration state of a non-inspected outside facility without dispatching a technician to the site are provided. A machine learning device 301 according to the present invention generates a learning model M1 by which a computer determines deterioration of an outside facility and includes an input unit 11 to which facility data D1 representing features and states of the outside facility and deterioration data D2 representing presence or absence of deterioration that has occurred in the outside facility are input, and an analysis unit 12 which generates the learning model M1 by performing supervised learning using the facility data of the outside facility in a deterioration state and the facility data of the outside facility that is not in a deterioration state as training data.
-
公开(公告)号：US20220327779A1
公开(公告)日：2022-10-13
申请号：US17634595
申请日：2019-08-19
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Masaaki INOUE , Hitoshi NIIGAKI , Yukihiro GOTO , Shigehiro MATSUDA , Toshiya OHIRA , Ryuji HONDA , Tomoya SHIMIZU , Hiroyuki OSHIDA
Abstract: An object of the present disclosure is to provide a technique for creating a three-dimensional model of a line-like structure from a point cloud obtained using three-dimensional laser measuring equipment and detecting a three-dimensional model of a cable. A detection apparatus according to the disclosure includes a point cloud data input unit 12 that reads point cloud data where a structure that is present in a three-dimensional space is represented by a point cloud that is present in the three-dimensional space, a rule-based three-dimensional model generation unit 15 that combines linearly disposed point clouds into a group and generates a three-dimensional model of a line-like structure using a direction vector configured with point clouds included in the group, a machine learning-based three-dimensional model generation unit 14 that generates a three-dimensional model of a line-like structure based on a database that links point clouds and line-like structures, and a three-dimensional model merging unit that selects one of a plurality of three-dimensional models of line-like structures generated at an identical position in the three-dimensional space as a three-dimensional model of a line-like structure that is present in the three-dimensional space and merges three-dimensional models of the line-like structures that are present in the three-dimensional space.
-
-
-
-
-
Search Results
6
records
(took 0.016 seconds)
