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graphdeco-inria / gaussian-splatting

Original reference implementation of "3D Gaussian Splatting for Real-Time Radiance Field Rendering"
https://repo-sam.inria.fr/fungraph/3d-gaussian-splatting/
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Depth unit #1043

Open muriatec opened 3 weeks ago

muriatec commented 3 weeks ago

Hello, thanks for adding the new feature of depth rendering! I'm trying to render depth from Gaussian splats and create point cloud from depth images, and I found the rendered depths are in pixel values (0~255), therefore I'd like to know how to convert from pixel values to real-world units (e.g. meters) given camera intrinsic?

AsherJingkongChen commented 3 weeks ago

We don't have real-world scales in COLMAP, right?

Because the camera poses are estimated from pixels, we can not know the real-world scales of Gaussians easily. (2D images lose their z-axis)

I think you could try to parse LiDAR data instead.