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Scene Registration

Measuring the crane points only needs to be done once per crane/camera load combination to ensure correct beam deflection. If the crane encoders are zeroed out at the crane default position, the crane can then be registered into an existing LIDAR or surveyed scene with one total station measurement and a rotation.

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Registration Procedure:

  • Resection the total station so that it is operating in the same coordinate system as the survey markers.
  • Survey a couple of stakes or markers, and enter their locations into the survey marker list.
  • Orient the camera so that it is facing some of the surveyed points that have been entered into the survey marker list, as they will be used for the angular adjustment. Lock off the crane to prevent motion.
  • Make sure that all of the Camera Offsets (Position XYZ Offset, Pan Offset) in the Tracker tab are set to 0.
  • Check¬† that the correct sensor size is selected.
  • Check that the correct lens model and serial number is selected, that the motion of the zoom live action matches the CG zoom, and that the near/far focus values match using Screen Text¬† values to verify.
  • Click the Edit button in the highlighted Crane Offset area above.
  • Select the point on the crane in the UI that you will measure with the total station. The point should generally be the remote head pivot.
  • Shoot the remote head pivot on the crane with the total station.
  • Enter the northing, easting, and elevation of the surveyed point.
  • Adjust the Crane Pan value until the survey markers line up correctly laterally.
  • Deselect the Edit button.

There may still be some vertical misalignment (a couple of pixels) between the virtual survey markers and the live action points.

  • To correct small alignments, use the tilt and roll adjustments in the Technocrane configuration panel. The values should be less than a degree for both tilt and roll, especially roll.
  • This set of steps removes most of the possible errors. If the survey cone points do not line up pretty closely with the live action markers, double check the remote head pivot to sensor back measurements, whether the remote head reads 0 for tilt when it is physically leveled, and whether the survey cone points are correctly surveyed.