GAP-LAB-CUHK-SZ / MVImgNet

CVPR2023 | MVImgNet: A Large-scale Dataset of Multi-view Images
https://gaplab.cuhk.edu.cn/projects/MVImgNet/
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Camera poses #15

Closed katjaschwarz closed 1 year ago

katjaschwarz commented 1 year ago

Hi, thank you for the fantastic dataset! I saw that sometimes there are multiple cameras for a sample (e.g. for mvi_30.zip 175/280142be/sparse/0/cameras.bin and 175/280142be/sparse/1/cameras.bin). They sometimes seem to correspond to the same images - which ones are the correct ones to use and what do the different cameras correspond to?

Larry-u commented 1 year ago

We enforce a single camera during COLMAP sparse reconstruction. However, if few images in a video contains less view-consistent features, they will be regarded as shot by another camera, and output a new camera pose, e.g. sparse/1. Usually, we use sparse/0 as the correct one and ignore the others.

katjaschwarz commented 1 year ago

Ok, got it! Thank you for the explanation.