Thin structures reproduction

Hello, I am trying to reproduce your results on the thin structures. I run the images through the COLMAP, calculate the camera_sphere.npz but the scale matrix is wrong. This is the scale matrix I get:

Scale matrix:
[[ 1.2317002e+03  0.0000000e+00  0.0000000e+00 -1.7486597e+02]
 [ 0.0000000e+00  1.2317002e+03  0.0000000e+00 -2.5129393e+01]
 [ 0.0000000e+00  0.0000000e+00  1.2317002e+03  1.0682924e+03]
 [ 0.0000000e+00  0.0000000e+00  0.0000000e+00  1.0000000e+00]]

I provide a visualisation of cameras in Unity3D. The cubes represent cameras, the rays from cubes outwards represent the camera direction where the blue rays are original cameras and the red rays are from the COLMAP. The XYZ cross represents world’s center (0,0,0).

Visualisation of not scaled cameras:

Visualisation of scaled cameras: red cameras are scaled down way too much

However, it works on the DTU and BMVS datasets. Could you please provide any details on how did you get your camera_sphere.npz for the thin structures, or any idea what could be wrong or how to set the preprocess_cameras.py?

[huizhang0110]

Thanks for your kind reply and looking forward to the code, and your work toward open code is important for this community.

[Totoro97]

@huizhang0110 @theFilipko Hi sorry for the late reply! I will sort out and clean the codes these days. The original calibration codes are written in c++.