Method and system for performing automatic camera calibration for a scanning system

    公开(公告)号:US11074722B2

    公开(公告)日:2021-07-27

    申请号:US16682560

    申请日:2019-11-13

    Applicant: MUJIN, INC.

    Abstract: A system and method for performing automatic camera calibration is presented. The system communicates with a first camera and a second camera, wherein a transparent platform is disposed between the two cameras. When a 3D calibration pattern is disposed on the platform, the system receives a first set of calibration images from the first camera, and a second set of calibration images from the second camera. The system determines, based on the first set of calibration images, a first set of coordinates for corners of the polyhedron. The system further determines, based on the second set of calibration images, a second set of coordinates for the corners. The system determines, based on the coordinates, a spatial relationship between the first camera and the second camera. The system further uses a description of the spatial relationship to generate a 3D model of an object other than the 3D calibration pattern.

    Method and control system for verifying and updating camera calibration for robot control

    公开(公告)号:US10562186B1

    公开(公告)日:2020-02-18

    申请号:US16525004

    申请日:2019-07-29

    Applicant: MUJIN, INC.

    Abstract: A robot control system and a method for camera calibration verification is presented. The robot control system is configured to perform a first camera calibration, and to control a robot arm to move a verification symbol to a reference location. The robot control system further receives, from a camera, a reference image of the verification symbol, and determines a reference image coordinate for the verification symbol. The robot control system further controls the robot arm to move the verification symbol to the reference location again during an idle period, receives an additional image of the verification symbol, and determines a verification image coordinate. The robot control system determines a deviation parameter value based the reference image coordinate and the verification image coordinate, and whether the deviation parameter value exceeds a defined threshold, and performs a second camera calibration if the threshold is exceeded.

    Method and system for performing automatic camera calibration for a scanning system

    公开(公告)号:US11967113B2

    公开(公告)日:2024-04-23

    申请号:US17350006

    申请日:2021-06-17

    Applicant: MUJIN, INC.

    CPC classification number: G06T7/85 G06T7/75 H04N13/246 G06T2207/10012

    Abstract: A system and method for performing automatic camera calibration is presented. The system communicates with a first camera and a second camera, wherein a transparent platform is disposed between the two cameras. When a 3D calibration pattern is disposed on the platform, the system receives a first set of calibration images from the first camera, and a second set of calibration images from the second camera. The system determines, based on the first set of calibration images, a first set of coordinates for corners of the polyhedron. The system further determines, based on the second set of calibration images, a second set of coordinates for the corners. The system determines, based on the coordinates, a spatial relationship between the first camera and the second camera. The system further uses a description of the spatial relationship to generate a 3D model of an object other than the 3D calibration pattern.

    Method and control system for verifying and updating camera calibration for robot control

    公开(公告)号:US11590656B2

    公开(公告)日:2023-02-28

    申请号:US17135261

    申请日:2020-12-28

    Applicant: MUJIN, INC.

    Abstract: A computing system and a method for calibration verification is presented. The computing system is configured to perform a first calibration operation, and to control a robot arm to move a verification symbol to a reference location. The robot control system further receives, from a camera, a reference image of the verification symbol, and determines a reference image coordinate for the verification symbol. The robot control system further controls the robot arm to move the verification symbol to the reference location again during an idle period, receives an additional image of the verification symbol, and determines a verification image coordinate. The robot control system determines a deviation parameter value based the reference image coordinate and the verification image coordinate, and whether the deviation parameter value exceeds a defined threshold, and performs a second calibration operation if the threshold is exceeded.

    Method and system for determining poses for camera calibration

    公开(公告)号:US11370121B2

    公开(公告)日:2022-06-28

    申请号:US16667170

    申请日:2019-10-29

    Applicant: MUJIN, INC.

    Abstract: A method and system for determining poses for camera calibration is presented. The system determines a range of pattern orientations for performing the camera calibration, and determines a surface region on a surface of an imaginary sphere, which represents possible pattern orientations for the calibration pattern. The system determines a plurality of poses for the calibration pattern to adopt. The plurality of poses may be defined by respective combinations of a plurality of respective locations within the camera field of view and a plurality of respective sets of pose angle values. Each set of pose angle values of the plurality of respective sets may be based on a respective surface point selected from within the surface region on the surface of the imaginary sphere. The system outputs a plurality of robot movement commands based on the plurality of poses that are determined.

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