Registering Scans
Scan points are identified by coordinates that locate them in 3D space. Scan registration adjusts coordinates to position scans correctly, relative to known reference coordinates.
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To register unregistered scans, ensure you have reference data that has overlapping areas with the unregistered scan.
Note: Best results are achieved with a minimum of 30% overlap.
Follow these steps to register the unregistered scans:
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Load the unregistered scan into a new view window.
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Load the reference data into a separate view window.
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Tile and tie the two windows. See Tying View Windows Together.
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Identify a common reference point between the scans.
Tip: To make the common point easier to track, identify it on the reference data with either a point (see Points > Points) or a marker (see Annotation > Marker). Ensure the identifying point or marker is loaded and visible in both view windows.
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Transform the unregistered scan so that it is in approximately the right position with respect to the reference data:
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Place the axes on the common reference point in the reference scan. See Camera > Set Centre of Rotation.
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Translate the unregistered scan so that the reference points coincide. See Transform > Translate.
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Rotate the unregistered scan into the same orientation as the reference scan. See Transform > Rotate.
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Run the global registration tool to register the unregistered scan. See Global.
Tip: If the scans do not appear to be correct after registration or if levelling issues occur, try connecting points between the scans, then running global registration again. Select overlapping points and connect using the smart connect tool. See Scan > Smart Connect.
Tip: You can display scanner level correction by selecting the scan in the project explorer and selecting Query > Properties > Properties twice. Level correction data is displayed in the report window.
