search

BaowenZ / RaDe-GS

RaDe-GS: Rasterizing Depth in Gaussian Splatting
Other
328 stars 7 forks source link

Question about depth computation #18

Closed LinzhouLi closed 1 week ago

LinzhouLi commented 1 week ago

Hi! Thanks for your great work. However I am confused with the depth computation in the CUDA code. The implenmentation seems quite different from the equations introduced in the original paper (Eq.13 - Eq.17). Can you please explain more about the code of function computeCov2D in file diff-gaussian-rasterization/cuda_rasterizar/forward.cu. Especially Line 165 - Line 168 and Line 180 - Line 184, what is the meaning of cov_cam_inv, uvh, uvh_m and nJ_inv?

BaowenZ commented 1 week ago

Hi! Thank you for your carefully reading. This is related to #11. cov_cam_inv is the inverse of Gaussian covariance in camera space, uvh is $(u,v,1)$, non-zero components of nJ_inv is the first two rows of inverse of Jn divided by a factor.

LinzhouLi commented 1 week ago

Thanks for your reply!