Question about the loss on SDF

vsitzmann / siren

Official implementation of "Implicit Neural Representations with Periodic Activation Functions"

MIT License

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Question about the loss on SDF #14

Open XLechter opened 4 years ago

XLechter commented 4 years ago

Thanks for your great work first. In the SDF experiments, I am confused about why the the norm of spatial gradients should to be 1 almost everywhere. Can you give me a Intuitive explanation? Thanks so much!

simesgreen commented 4 years ago

It's a property of signed distance fields that the gradient is always unit length, you can also think of this as the surface normal.