Correspondence View

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In the correspondence view, you can change the position of scans. This can be helpful to pre-align scans before running a cloud-to-cloud registration or to verify registration results.

To open the correspondence view, right-click the Cluster node in the structure view.
From the context menu select View > Correspondence View.

You can also open the correspondence view in the interactive registration.

If there are clusters that are not located in the center of their scans, a message is shown asking you whether you want to move the clusters to the center of their scans. You can also make this a default in the registration settings.

Now you can start placing the scans.

Click the scan tag.
Rotation and movement manipulators are shown on the scan.
Drag and drop the scans or use the keys described below to move the scans.
Look for unique points in the scans, e.g., trees or buildings and align them. To adjust the height, select the side view (front, back, left or right).

Keyboard Options for Positioning Scans

The following options are available on a keyboard with a number pad:

Change the size of the manipulators with the number pad + key (increase size) and - key (decrease size).
Use keys 8 and 2 to move the selected scan up and down.
Use keys 4 and 6 to move the selected scan to the left and to the right.
Use keys 9 and 7 to move the selected scan clockwise and counterclockwise.

Only a certain amount of pixels is moved when you use these keys. If you have zoomed in, the scan representation on the screen will move very slowly. If you want to go faster, zoom out before moving the scan representation.

Undo and Redo Changes

You may undo and redo your changes with the following buttons:
Undo the last transformation change with .
Redo the last transformation change with .
Restore the initial transformation with .

Note that this is only possible as long as the current scan is selected. When you select another scan, you can no longer undo and redo the changes of the previous scan.