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nerfstudio-project / nerfstudio

A collaboration friendly studio for NeRFs
https://docs.nerf.studio
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point cloud from RGB and depth #3440

Open Lizhinwafu opened 4 weeks ago

Lizhinwafu commented 4 weeks ago

I rendered RGB and depth, and generated point clouds from multiple views using the intrinsic and extrinsic parameters estimated by COLMAP. Why do the point clouds generated from multiple views not overlap with each other?

ZaychikLiu commented 3 days ago

In my opinion, COLMAP's reconstruction typically lacks a fixed scale, meaning the reconstructed scene doesn’t have an absolute size. As a result, point clouds generated from different viewpoints might have different relative scales. This discrepancy causes the point clouds to not align properly when combined, leading to misalignment or non-overlapping points in the 3D space.