Description
Is your feature request related to a problem? Please describe.
An early experiment showed that there was large speed-up using dense solvers #2161
The goal is to leverage GPU to speed up BA solving in general.
Describe the solution you'd like
Recently Ceres merged cuDSS support for sparse Cholesky ceres-solver/ceres-solver@6fb3dae and the unit tests show an example of CUDA sparse Bundle Adjustment: ceres-solver/ceres-solver@6fb3dae#diff-dc637bf6d41e3df3a877146387833e8147c045b9b0476a1c55b0f3f0ffc12a0fR49
Perhaps these new changes could be adopted into COLMAP
Additional context
Another PR aiming at faster BA: #2567
Am creating this GH Issue to track since it appears there is no other issue currently, but there are a few scattered related PRs / issues.