Relationship between density and sdf

zju3dv / neuralbody

Code for "Neural Body: Implicit Neural Representations with Structured Latent Codes for Novel View Synthesis of Dynamic Humans" CVPR 2021 best paper candidate

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Relationship between density and sdf #12

Closed ryancll closed 3 years ago

ryancll commented 3 years ago

Hi Sida @pengsida ,

Thank you for sharing the great work!

I'm confused about the strategy you used to extract mesh. According to your paper and code, you feed volume density to Marching Cubes algorithm, while we used to feed SDF values. Could you please explain the phyicial theories for replacing sdf with density in your work and how do you determine the threshold of the iso-surface?

Thank you so much!

Ryan

pengsida commented 3 years ago

Neural radiance fields use density for volume rendering. We manually determine the threshold of the iso-surface.