Vignetting correction

Hi Clotilde ,
Thanks a lot ! Actually I have learned a lot from this paper.

I have several relative questions about the experiment:

  1. Performing the experiment in the daylight room or electrical light one, which one is better? Cause that paper suggested keeping a stable lighting environment.
  2. How to find the coordinates of the center of the fisheye view? Cause the center of the image is probably not the true center.
    someone has noticed this question:
    https://discourse.radiance-online.org/t/vignetting-correction-on-a-fish-eye-image/4445/2?u=lee