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computational-imaging / GSM

Gaussian Shell Maps for Efficient 3D Human Generation (CVPR 2024)
https://rameenabdal.github.io/GaussianShellMaps/
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The scaling for gaussians #2

Open Xin-97 opened 7 months ago

Xin-97 commented 7 months ago

Hi authors, thanks for your great work. I want to ask why scaling is set around -5. Why is it a negative number? Thanks!

zjwfufu commented 7 months ago

The scaling is also activated by a exponential function as in the original 3DGS. exp(-5) corresponds to about 0.006. This activation is to map the scaling which has small order-of-magnitude into logarithmic coordinates, thus facilitating optimization.

Xin-97 commented 6 months ago

Hi @zjwfufu, thanks for your reply. I notice that in the paper, they calculate S_ref in Eq. 8, do you know how to do the calculation to get S_ref=-5.0? Thanks.