How can I get the correspondence indices between two point cloud after registrated by `small_gicp.align`?

[OuYaozhong]

Hi, @koide3,

Thank you for your great work.

In my application, I want to get the correspondence indices between two point cloud.

But I have walk through the manual, it seems that the return of small_gicp.align did not have the correspondence indices.

Is that right ? Or something I missing ?

If it is true that no correspondence indices will be returned, any suggestion for getting the correspondence indices? Just simply calculated the the point-pair whose distance is smaller than the max_correspondece_distance parameter ?

Thank you in advance.