Good afternoon,
I am working with images collected from a submersible to reconstruct an underwater scene. Sadly, there is no GCPs or navigational information available due to the sort of extreme environment, only scale. I am trying to calibrate a camera lens to help alleviate any potential doming effects - which so far doesn't appear (obviously), probably to many oblique camera angles.
We have images of a chess board pattern, however the program is not picking the pattern out. This is likely because the board is too far away from the camera - despite good image clarity. I do however have some valid calibration points from the same scene, but the camera was zoomed in at 24mm, rather than the 18mm used for the reconstruction. So I have two questions,
Is there a way to manually calibrate the lens - trying to place points at the cross points of the checkers board?
If not, can i use calibration information from a different zoom? (I suspect not...)
Finally, I guess one other question. I have read that the automatic "calibration" when optomizing the camera positions is very good - so is it OK to not manually calibrate the lens?
Kindest regards,
David