Questions about the camera-normalization step

[raynehe]

Hi! Thanks for the amazing work!

I've got a question and hope you could give me a hint. To my understand, the "camera normalization" step (as stated in Supplementary material B.1) is only used for placing the camera inside a sphere in the world coordinate. In the .conf file there is a parameter scene_bounding_sphere, and according to the class ImplicitNetwork, if scene_bounding_sphere is set to 0, the step "Clamping the SDF with the scene bounding sphere" would be ignored.

My question is I'm not sure if I could skip this step. In my experiment setting, the camera is placed on the surfce of a sphere (rather than at the center of the sphere). If I do not use normalize_cameras.py to undergo the data convention, and set the parameter scene_bounding_sphere to the radius of the sphere, I'm not sure whether it would effect the opacity approximation error bound.

Could you illustrate more about the function of the "camera normalization" step? Thank you very much! 😆