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graphdeco-inria / hierarchical-3d-gaussians

Official implementation of the SIGGRAPH 2024 paper "A Hierarchical 3D Gaussian Representation for Real-Time Rendering of Very Large Datasets"
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Question on scene scaling #46

Closed Gaaaavin closed 2 months ago

Gaaaavin commented 2 months ago

I noticed that in auto_reorient.py, the scene is scaled so that the average point to camera-center distance is 20m. I'm curious what's the reason for this number. Is that purly based on experience?

ameuleman commented 2 months ago

Hi, Our datasets are scaled to metric using some measurements, such as car or road lengths. For our code release, we then estimated the median point-to-camera distance for one of our datasets (SmallCity) and found it to be roughly 20. We used it in the auto_reorient script to maintain a similar behaviour.

Gaaaavin commented 2 months ago

Thank you for the clarification!