V100 optical center
Posted: Mon Dec 06, 2010 8:59 pm
Hey all.
I've got a question about the older v100 cameras and their optical center.
I just finished up writing my own distortion solver. And I'm finding that every lense I've got (I have a mixed system) has its optical distortion off center, about 40 pixels to the left and 20 pixels low.
Since all the lenses have been re-back focused a few times at least, by me, I know their current rotation is random. And therefore if the issue were with the lense, I'd expect to see erratic optical centers for the lense distoriton. Instead its consistent. So I'm guessing its either the lense mount or the sensor mount.
I'm moving into full camera calibration shortly. While its common for the optical center of the distoriton to also be the optical center of the image, its not a rule. And I'm curious if anyone has enough experience calibrating v100 cameras to know of this phenomenon.
My thesis, would be that all the v100 cameras are simply consistently optically centered down and to the left by design or by manufacturing process. This is of course, easy for the software to correct. I'm just looking for info.
Thanks.
-brad
I've got a question about the older v100 cameras and their optical center.
I just finished up writing my own distortion solver. And I'm finding that every lense I've got (I have a mixed system) has its optical distortion off center, about 40 pixels to the left and 20 pixels low.
Since all the lenses have been re-back focused a few times at least, by me, I know their current rotation is random. And therefore if the issue were with the lense, I'd expect to see erratic optical centers for the lense distoriton. Instead its consistent. So I'm guessing its either the lense mount or the sensor mount.
I'm moving into full camera calibration shortly. While its common for the optical center of the distoriton to also be the optical center of the image, its not a rule. And I'm curious if anyone has enough experience calibrating v100 cameras to know of this phenomenon.
My thesis, would be that all the v100 cameras are simply consistently optically centered down and to the left by design or by manufacturing process. This is of course, easy for the software to correct. I'm just looking for info.
Thanks.
-brad