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Published 20 hours ago • verified publisher icon graphdeco-inria

Question about the render function of inverse depth

Open RM-Zhang opened this issue 6 months ago • 4 comments
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Hi, thanks for your excellent work.

I noticed that the code computes the weighted average of the inverse depths of all Gaussians to get the rendered inverse depth value.

https://github.com/graphdeco-inria/diff-gaussian-rasterization/blob/9c5c2028f6fbee2be239bc4c9421ff894fe4fbe0/cuda_rasterizer/forward.cu#L374-L375

But from my understanding, it should first compute the weighted average of the depths, and then take the inverse. These two ways are not equivalent, so I’m wondering: is it a bug, or did I misunderstand something?

RM-Zhang avatar Apr 25 '25 08:04 RM-Zhang