Dec 31, 2023 · When you have a training image which captures a far-away gaussian, the world-space 3D mean's gradient of the far-away gaussian should be small because perturbing one unit of the GS …

# Extract points that satisfy the gradient condition selected_pts_mask = torch. where (torch. norm (grads, dim=-1) >= grad_threshold, True, False) selected_pts_mask = torch. logical_and …

Nov 18, 2023 · I face the same problem, by checking the code, I think the main reason leading to this problem is the "pruning". Sometimes, all Gaussians are pruned so that the number of gaussian is 0, …

I made a tiny change to the implementation of densify & prune process and now the new gaussians' gradient will be exactly zero while others remain the same, thus seperate the two.

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Dec 29, 2023 · Adaptive Gaussian control uses partial derivative (dL/du) to determine which Gaussian to be split/cloned. The function precomputes the gradient to every Gaussian in the visible frustum.

Nov 21, 2023 · I am recently looking at the backward pass of the gradient calculation. It seems to me that the gradient passed to the transmittance $T$ term is missing, which affects the calculation of the …

Jul 24, 2024 · I've been working on a point cloud densification process, and I noticed that during the cloning of points, the new points are not being moved along the gradient direction.

Oct 25, 2024 · Dear Author, Why is it said that the view-space positional gradients are calculated in the NDC coordinate system? I noticed in the backward.cu code that the distance d is calculated in the …

Nov 13, 2024 · Can't we use this function rasterize_gaussians to get the gradient of the pose of the view camera in raster_settings? If I want to do this, is it mathematically derivable?