CloudCompare forum

Hello,

I am trying to learn about scale estimation of two point cloud with different scales. I found the relevent functions in cloudcompare (registration->match scales).

I'm interested in the algorithm of scale match with PCA, could you share me linked articles which you applied?

Thanks so much!

There's no particular article, it's pretty simple. You compute the PCA, deduce the main axis (for each cloud) and use the cloud extents along this axis to scale the cloud.

Thanks a lot for your in time reply! And is this scale estimation method with PCA only for those point clouds with fully overlap?

Well it works only if both clouds are 'complete' indeed. If you have missing parts, then the ICP and the Point-pair based alignment tools are much more robust.