NeRF– Neural Radiance Fields without Known Camera Parameters

NeRF: camera parameters from COLMAP

• learned camera parameters?
  • jointly train parameters with MLPs
  • assumptions: principle points are at center
  • axis-angle representation of rotation
  • initialization matters: R=I, t=0
  • train and drop initial NeRF, keep camera
• drop hierarchical sampling: for a weaker baseline or stable training?
• 128 hidden size…