About colmap_id in camera class; Correspondence between colmap_id and order of images in SIBR Viewer.

[KenKobayashilax]

Thanks for your great job!

This is not a question but a suggestion of improvement about initialization of colmap_id in Camera class.

When I use COLMAP dataset of single intrinsic parameter (I used Deblur Nerf Dataset), all of colmap_id in scene.train_cameras and scene.test_cameras are set to 1.0.

This may cause a problem that we can't find the correspondences among viewpoints in code and those in SIBRviewer.

To solve this, I changed gaussian-splatting/scene/dataset_readers.py line 84 from uid = intr.id to uid = extr.id.

This change will enable to send information about image ids in colmap to Camera class as Camera.colmap_id.