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tobias-kirschstein / nersemble

[Siggraph '23] NeRSemble: Neural Radiance Field Reconstruction of Human Heads
https://tobias-kirschstein.github.io/nersemble/
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Coordinate System of Camera Matrix #9

Closed JeremyCJM closed 3 months ago

JeremyCJM commented 3 months ago

Hi authors, in your dataset, the camera extrinsics are stored in camera_params.json. Could you share which coordinate system are those matrices in? Are they in OpenGL or OpenCV or Pytorch3D style?

JeremyCJM commented 3 months ago

I just found the answer in this file. It is OpenCV coordinate system. Thanks!

tobias-kirschstein commented 3 months ago

Yes, it is OpenCV. We also describe it in the README:

Extrinsics are given in world2cam format with the camera space following OpenCV convention (x -> right, y -> down, z -> forward).
The world space is metric.
The intrinsics are given wrt to the full image resolution (3208 x 2200) and are shared for all 16 cameras.