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Totoro97 / f2-nerf

Fast neural radiance field training with free camera trajectories
https://totoro97.github.io/projects/f2-nerf/
Apache License 2.0
933 stars 69 forks source link

Questions about the `frame_trans` #81

Closed s1752729916 closed 1 year ago

s1752729916 commented 1 year ago

hi, thanks for your excellent work!!! I am reading your codes and I encountered some issues:

  1. what does frame_trans represent? My understanding is to project the points in the world coordinate system to (u, v) space, frame_trans is the operation of projecting points from world space into (u, v) space?

  2. If the frame_trans does project the points from world space into (u, v) space, what does transed_vals mean in QueryFrameTransform? why transed_vals (i,0)= xz[0]/xz[1]?

I may have misunderstood something, thank you for your answer!