Register 2 extra clouds

[Jacb1]

Hello new to cloud compare. What would be the best way to register a couple of extra scans scan to group of already registered scans? Can I do a cloud to cloud with the group scans holding position as they are georeferenced? Or should I look at picking points or using targets?

[daniel]

Well, targets are always a very robust solution (but CC only accepts spherical ones).

But otherwise, I would recommend using 'point pair based alignment' at least to roughly register the new scans to the group of already georeferenced ones, and then if necessary run ICP to refine the result (with the right 'overlap' setting, depending on how much of the new scan overlaps with the georeferenced ones).

[Jacb1]

Thank you Daniel, I will take a look. Ideally if I don't need to go back and introduce control for these new scans that will be easier so I will try this method first. I have found a few videos a few mention this method perhaps in different wording but will see how I get on.

Thank you