How to do register stereo sequences captured by multi-view rig with COLMAP?

[Chonghyuk (Andrew) Song]

Hello,

first of all, thank you for releasing the amazing work that is Nerfies.
I was wondering what code / method was used to register the stereo RGB sequences captured by the multi-view camera rig in the quantitative evaluation portion of the paper.

It was mentioned in page 7 of the paper that "We register the images using COLMAP [48] with rigid relative camera pose constraints," but I couldn't find the piece of code in the nerfies codebase that carries out this left-right camera registration. I need this code to register my custom dataset captured by a multi-view camera rig.

I would really appreciate your help on this matter.
Best,
Andrew.