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公开(公告)号：US20220313075A1
公开(公告)日：2022-10-06
申请号：US17669388
申请日：2022-02-11
Inventor： Zaixing MAO , Kyoko OHNO-MATSUI , Hiroyuki TAKAHASHI , Noriko NAKAO
Abstract: A medical diagnostic apparatus includes a receiver circuit that receives three-dimensional data of an eye, and processing circuitry configured to segment the three-dimensional data into regions that include a target structural element and regions that do not include the target structural element to produce a segmented three-dimensional data set. The segmenting is performed using a plurality of segmentation algorithms. Each of the plurality of segmentation algorithms is trained separately on different two-dimensional data extracted from the three-dimensional data. The processing circuitry is further configured to generate at least one metric from the segmented three-dimensional data set, and evaluate a medical condition based on the at least one metric.
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公开(公告)号：US11460561B2
公开(公告)日：2022-10-04
申请号：US16205420
申请日：2018-11-30
Applicant: TOPCON CORPORATION
Inventor： You Sasaki
Abstract: A technique is provided to enable check of calibrated condition of a total station (TS) having a laser scanner at a surveying site. The TS includes an optical system, a laser positioning part, a plane equation calculator, a laser scanner, a separation amount calculator, and an exterior orientation parameter calculator. The laser positioning part emits laser light on an object via the optical system to position the object. The plane equation calculator calculates an equation of a specific plane on the basis of result from the laser positioning part. The laser scanner scans the specific plane with laser light to obtain scanning points. The separation amount calculator calculates a separation amount of the respective scanning points from the specific plane. The exterior orientation parameter calculator calculates exterior orientation parameters of one or both of the laser positioning part and the laser scanner so that the separation amount will be small.
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公开(公告)号：US11460548B2
公开(公告)日：2022-10-04
申请号：US16365243
申请日：2019-03-26
Applicant: TOPCON CORPORATION
Inventor： Fumio Ohtomo , Kaoru Kumagai
Abstract: A surveying device body includes a distance measuring section to measure a distance to the measurement target, an optical axis deflector that deflects distance measuring light with respect to a reference optical axis, a measurement direction imaging section that obtains an observation image, and an attitude detector that detects an incline of the surveying device body. A computation controller displays a portion of the observation image on the display unit, computes a direction angle of the distance measuring optical axis on the basis of a detection result of the attitude detector and a deflection angle of the distance measuring optical axis with respect to the reference optical axis, and measures the measurement target on the basis of the direction angle and a distance measurement result of the distance measuring section using a reference point as a reference.
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公开(公告)号：US20220299665A1
公开(公告)日：2022-09-22
申请号：US17654999
申请日：2022-03-16
Applicant: Topcon Corporation
Inventor： Takeshi SASAKI , Norikatsu SHIBATA , Nobuyuki FUKAYA
Abstract: A surveying information management system using an information display terminal and a surveying device configured to measure a point cloud in a three-dimensional space includes: a surveying information acquisition unit configured to acquire, from the surveying device, the surveying information including point cloud data associated with position information; an area setting unit configured to set a display area for the point cloud; a segment setting unit configured to divide the display area into predetermined unit segments; a point cloud amount calculation unit configured to calculate a point cloud amount in a space of each of the unit segments; and a point cloud amount display unit configured to display, on the information display terminal, information according to the point cloud amount calculated for each of the unit segments of the display area by the point cloud amount calculation unit.
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公开(公告)号：US20220291043A1
公开(公告)日：2022-09-15
申请号：US17653645
申请日：2022-03-05
Applicant: Topcon Corporation
Inventor： Akira TAKADA
Abstract: A wavelength-swept light source is configured to generate light to be measured that is wavelength-swept coherent light with a wavelength periodically changed. The light to be measured is separated into a measurement section and a reference section that have different optical path lengths, and is then coupled in an interference section to generate interfering light. An analyzer performs a Fourier transform of interference signals of the interfering light, and acquires an actual measured noise floor value for each of the optical path length differences based on a point spread function. An estimated coherence time is determined so that an actual measured amplitude value of the noise floor value and a calculated amplitude value coincide with each other. Linewidth of the light emitted from the coherent light source is measured based on the estimated coherence time.
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Patent Agency Ranking
公开(公告)号：US20220276049A1
公开(公告)日：2022-09-01
申请号：US17667152
申请日：2022-02-08
Applicant: TOPCON CORPORATION
Inventor： Takeshi KIKUCHI
Abstract: A measuring system includes a surveying instrument including a distance-measuring section, an angle-measuring section, an imaging section, a drive section, and a communication section, a measuring marker to be carried by a worker, including a position sensor, a posture sensor, a laser emitting section, a laser light emission port, a distance meter, and a communication section, an eyewear device to be worn on the head of the worker, including a display, an imaging section, a position sensor, a posture sensor, and a communication section, and an arithmetic device configured to synchronize coordinate of the above devices, and calculate an identified three-dimensional position of the measurement point by image analysis from images imaged by the imaging sections of the surveying instrument and the eyewear device, and measures the identified three-dimensional positions of a plurality of the measurement points in the order in which measurement instructions were issued by the worker.
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公开(公告)号：US20220252396A1
公开(公告)日：2022-08-11
申请号：US17581308
申请日：2022-01-21
Applicant: TOPCON CORPORATION
Inventor： Takeshi KIKUCHI
Abstract: A three-dimensional position measuring system includes a surveying instrument including a distance-measuring section, an imaging section, an angle-measuring section, a drive section configured to drive the distance-measuring section to set angles, and a communication section, and a measuring marker including a position sensor, a posture sensor, a laser emitting section configured to emit laser light of visible light in an axial direction, an emission port for the laser light, and a communication section, wherein the measuring marker calculates position information and posture information of the emission port from the position sensor and the posture sensor and transmits the information to the surveying instrument, and the surveying instrument measures a three-dimensional position of the emission port, grasps the axial direction based on the posture information and searches for a measurement point in the axial direction by the imaging section, and measures a three-dimensional position of the measurement point.
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公开(公告)号：US20220244381A1
公开(公告)日：2022-08-04
申请号：US17580147
申请日：2022-01-20
Applicant: TOPCON CORPORATION
Inventor： Yasutoshi AOKI , Jun ABE
Abstract: Provided is an electro-optical distance meter includes a light transmitting unit configured to emit distance-measuring light along a collimation axis toward a measuring object; a light receiving unit including a light receiving element configured to receive reflected distance-measuring light and convert the reflected distance-measuring light into a distance-measuring signal, and a received light amount adjuster configured to adjust a light amount entering the light receiving element; an arithmetic control unit; and a storage unit. The arithmetic control unit calculates a true distance-measuring signal by subtracting an optical noise signal stored in advance in the storage unit and an electrical noise signal measured before a distance measurement from the distance-measuring signal, and calculates a distance to the measuring object based on the true distance-measuring signal.
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公开(公告)号：US11385337B2
公开(公告)日：2022-07-12
申请号：US15850212
申请日：2017-12-21
Applicant: Topcon Corporation
Inventor： You Sasaki , Tadayuki Ito
Abstract: A method for calibrating unevenness of a plurality of measuring elements in an apparatus for evaluating road surface property having a plurality of measuring elements repeats steps of computing separation quantities from a calibration reference plane on a reference area regarding all measuring elements; determining a measuring element where the separation quantity is maximum from among all the measuring element to calibrate the measuring element such that a difference between point cloud data produced from a measurement value of the measuring element where the separation quantity is maximum and the calibration reference plane becomes equal or less than a predetermined value, producing a new calibration reference plane from the measurement values of the measuring elements including the calibrated measuring element, until RMS of point cloud data does not change.
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80.发明授权公开(公告)号：US11341673B2
公开(公告)日：2022-05-24
申请号：US16850702
申请日：2020-04-16
Applicant: Topcon Corporation
Inventor： Gaku Takeuchi
IPC: G06V10/143 , G06V10/147 , G06V20/13 , G06T7/73
Abstract: In measurement using infrared images that are obtained by nighttime aerial photography, a correspondence relationship between the infrared images is determined with high accuracy by the following method. In this method, agricultural land is photographed from the air at night by using an infrared camera mounted on a UAV. In the state in which multiple infrared light emitting points are installed on agricultural land, the agricultural land is photographed multiple times by the infrared camera while the UAV flies at night in such a manner that a part of the agricultural land is commonly contained in multiple infrared photographic images. Then, a correspondence relationship between the multiple infrared photographic images is determined by using bright points of the infrared light emitting points in the part of the agricultural land commonly contained in the infrared photographic images.
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