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Calibrating Cameras

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  • Paul CarffP Offline
    Paul CarffP Offline
    Paul Carff
    Contributor
    wrote on last edited by
    #1

    I seem to have successfully calibrated the tracking camera and the front stereo cameras.

    However the rear stereo cameras are not so easy:
    This is on a sentinel wiht SDK 1.0.0

    voxl2:~$ voxl-calibrate-camera stereo_rear -s 6x9 -l 0.036
    Please open voxl-portal in a web browser to view the camera calibrator overlay stream
    Calibrating Left Camera
    Matrix
    [501.6341078021471, 0, 312.0570434152602;
    0, 501.6987891542731, 222.2877324066488;
    0, 0, 1]
    Distortion
    [-0.1502441527526627;
    0.03136514258800416;
    5.047978211251211e-06;
    0.0007012198359013242;
    0]
    distortion_model: plumb_bob
    Re-projection error reported by calibrateCamera: 0.339971
    Calibration Succeded!
    Calibrating Right Camera
    Matrix
    [499.4811952338386, 0, 314.4191622715103;
    0, 499.6489291511509, 227.6223607658805;
    0, 0, 1]
    Distortion
    [-0.1549310463664996;
    0.03293348747609434;
    -0.0007877854337037341;
    0.0003367908453812461;
    0]
    distortion_model: plumb_bob
    Re-projection error reported by calibrateCamera: 0.322899
    Calibration Succeded!
    Calibrating Extrinsics
    4 frames will be processed
    R
    [0.9986976114002246, -0.05097017966660664, -0.002263132395515557;
    0.05095755996436296, 0.9986866400336852, -0.005321851248074788;
    0.002531415802302149, 0.005199596424927816, 0.999983277925713]
    T
    [-0.08038782105206063;
    -0.005256904223362341;
    0.003021027838004832]
    Re-projection error reported by stereoCalibrate: 0.524123
    Detected horizontal stereo pair
    Distance between cameras: 0.0804
    Extrinsics Calibration Failed
    exceeded allowable max reprojection error: 0.5

    Saved intrinsics to: /data/modalai/opencv_stereo_rear_intrinsics.yml
    Exiting Cleanly
    voxl2:~$

    Paul CarffP 1 Reply Last reply
    0
    • Paul CarffP Paul Carff

      I seem to have successfully calibrated the tracking camera and the front stereo cameras.

      However the rear stereo cameras are not so easy:
      This is on a sentinel wiht SDK 1.0.0

      voxl2:~$ voxl-calibrate-camera stereo_rear -s 6x9 -l 0.036
      Please open voxl-portal in a web browser to view the camera calibrator overlay stream
      Calibrating Left Camera
      Matrix
      [501.6341078021471, 0, 312.0570434152602;
      0, 501.6987891542731, 222.2877324066488;
      0, 0, 1]
      Distortion
      [-0.1502441527526627;
      0.03136514258800416;
      5.047978211251211e-06;
      0.0007012198359013242;
      0]
      distortion_model: plumb_bob
      Re-projection error reported by calibrateCamera: 0.339971
      Calibration Succeded!
      Calibrating Right Camera
      Matrix
      [499.4811952338386, 0, 314.4191622715103;
      0, 499.6489291511509, 227.6223607658805;
      0, 0, 1]
      Distortion
      [-0.1549310463664996;
      0.03293348747609434;
      -0.0007877854337037341;
      0.0003367908453812461;
      0]
      distortion_model: plumb_bob
      Re-projection error reported by calibrateCamera: 0.322899
      Calibration Succeded!
      Calibrating Extrinsics
      4 frames will be processed
      R
      [0.9986976114002246, -0.05097017966660664, -0.002263132395515557;
      0.05095755996436296, 0.9986866400336852, -0.005321851248074788;
      0.002531415802302149, 0.005199596424927816, 0.999983277925713]
      T
      [-0.08038782105206063;
      -0.005256904223362341;
      0.003021027838004832]
      Re-projection error reported by stereoCalibrate: 0.524123
      Detected horizontal stereo pair
      Distance between cameras: 0.0804
      Extrinsics Calibration Failed
      exceeded allowable max reprojection error: 0.5

      Saved intrinsics to: /data/modalai/opencv_stereo_rear_intrinsics.yml
      Exiting Cleanly
      voxl2:~$

      Paul CarffP Offline
      Paul CarffP Offline
      Paul Carff
      Contributor
      wrote on last edited by
      #2

      @Paul-Carff OK I guess 4th time is a charm. I completed successfully on the 4th try.

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